General Science Trivia Questions And Facts! Knowledge Test

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  • 1/50 Questions

    Which of the following vitamin is essential for eyes? 

    •  Vitamin C 
    •  Vitamin B 
    •  Vitamin A 
    •  Vitamin D
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About This Quiz

How big of a science geek are you? Do you think that you are almost at the genius level? Below is a general science trivia quiz that is designed to see if you are indeed as you think you are when it comes to this field. Do give it a shot and see how well you will do. Have fun!

General Science Trivia Questions And Facts! Knowledge Test - Quiz

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  • 2. 

    Which among the following is a carbohydrate ?

    • Nylon

    • Cane-sugar

    • Turpentine

    • Hydrogen peroxide

    Correct Answer
    A. Cane-sugar
    Explanation
    Cane-sugar is a carbohydrate because it is a type of sugar made up of carbon, hydrogen, and oxygen atoms. Carbohydrates are organic compounds that serve as a major source of energy for living organisms. Nylon, turpentine, and hydrogen peroxide are not carbohydrates as they do not contain the necessary elements or have the chemical structure characteristic of carbohydrates.

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  • 3. 

    The organisms that cause disease are called 

    • Vectors 

    • Pathogens 

    • Reservoirs 

    • Symptoms

    Correct Answer
    A. Pathogens 
    Explanation
    Pathogens are microorganisms such as bacteria, viruses, fungi, or parasites that can cause disease in their host organisms. They invade the body and disrupt normal bodily functions, leading to symptoms of illness. Vectors, on the other hand, are organisms that transmit pathogens from one host to another, while reservoirs are natural habitats where pathogens can live and multiply. Therefore, the correct answer is pathogens as they directly cause disease in their host organisms.

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  • 4. 

    Which of the following vitamin helps in coagulation of blood? 

    • Vitamin A 

    • Vitamin C 

    • Vitamin K 

    • Vitamin D

    Correct Answer
    A. Vitamin K 
    Explanation
    Vitamin K helps in the coagulation of blood. It plays a crucial role in the production of several proteins that are involved in the blood clotting process. These proteins are responsible for forming a clot to stop bleeding when there is an injury or damage to blood vessels. Without sufficient vitamin K, the blood clotting process may be impaired, leading to excessive bleeding or difficulty in stopping bleeding. Therefore, vitamin K is essential for maintaining normal blood clotting and preventing excessive bleeding.

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  • 5. 

    Which of the following Vitamin deficiency causes Pellagra? 

    • Vitamin K 

    • B3 (Niacin) 

    • Vitamin D 

    • Vitamin A

    Correct Answer
    A. B3 (Niacin) 
    Explanation
    Pellagra is caused by a deficiency of Vitamin B3, also known as Niacin. Pellagra is a condition characterized by the "3 D's" - dermatitis, diarrhea, and dementia. Niacin is essential for the body's metabolism and plays a crucial role in the production of energy from food. A deficiency in niacin leads to a lack of energy production, resulting in the symptoms of pellagra. Vitamin K is not related to pellagra, and deficiencies in Vitamin D and Vitamin A cause different health conditions.

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  • 6. 

    Which one of the following is viscous? 

    •  Alcohol

    • Water

    • Honey

    • Gasoline

    Correct Answer
    A. Honey
    Explanation
    Honey is viscous because it has a high viscosity, meaning it is thick and resistant to flow. This is due to its high sugar content, which gives it a syrup-like consistency. Unlike alcohol, water, and gasoline, which have low viscosity and flow easily, honey is thick and sticky.

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  • 7. 

    Which of the following vitamins are fat soluble? 

    • Vitamin A and D 

    • Vitamin E 

    • Vitamin K 

    •  All the above

    Correct Answer
    A.  All the above
    Explanation
    All of the above vitamins (A, D, E, and K) are fat soluble. Fat soluble vitamins are those that can dissolve in fat and are stored in the body's fatty tissues. They are absorbed along with dietary fats and can be stored in the body for longer periods of time compared to water soluble vitamins. Vitamin A is important for vision and immune function, vitamin D is crucial for bone health, vitamin E is an antioxidant that protects cells from damage, and vitamin K is necessary for blood clotting.

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  • 8. 

    Which of the following vitamins are water soluble? 

    • Vitamin A 

    • Vitamin E and K 

    • Vitamin B and C 

    • Vitamin D

    Correct Answer
    A. Vitamin B and C 
    Explanation
    Vitamin B and C are water soluble vitamins because they dissolve in water and are easily excreted from the body through urine. Water soluble vitamins are not stored in the body for long periods of time, so they need to be consumed regularly through diet. Vitamin A, E, K, and D are fat soluble vitamins, which means they are absorbed and stored in the body's fat tissues.

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  • 9. 

    Vitamin B1 is called 

    • Pyridoxin 

    • Rationol 

    • Niacin 

    • Thiamine

    Correct Answer
    A. Thiamine
    Explanation
    Thiamine is the correct answer because it is commonly known as Vitamin B1. It is an essential nutrient that plays a crucial role in converting food into energy and maintaining the health of the nervous system. Thiamine deficiency can lead to various health issues, including beriberi and Wernicke-Korsakoff syndrome. Therefore, Thiamine is the correct term for Vitamin B1.

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  • 10. 

    Which of the following Vitamin Causes Beri-Beri? 

    • Vitamin C 

    •  Vitamin B1 

    • Vitamin E 

    • Vitamin K

    Correct Answer
    A.  Vitamin B1 
    Explanation
    Vitamin B1 causes Beri-Beri. Beri-Beri is a condition caused by a deficiency of thiamine (Vitamin B1). Thiamine is essential for the proper functioning of the nervous system and the metabolism of carbohydrates. A deficiency in thiamine can lead to symptoms such as muscle weakness, fatigue, and nerve damage. Therefore, Vitamin B1 is the correct answer for the question.

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  • 11. 

    What are vitamins? 

    • Organic compound 

    • Inorganic compound

    • Living organism

    • None of these

    Correct Answer
    A. Organic compound 
    Explanation
    Vitamins are organic compounds that are essential for the proper functioning of the body. They are required in small amounts and play a crucial role in various bodily processes, such as metabolism, growth, and immunity. Organic compounds are characterized by the presence of carbon atoms, which are found in vitamins. Inorganic compounds, on the other hand, do not contain carbon atoms. Therefore, vitamins are correctly classified as organic compounds.

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  • 12. 

    Vitamin is Vitamin B5 (Pantothenic acid) available in 

    • Meat 

    • Broccoli 

    • Avocados 

    •  All the above

    Correct Answer
    A.  All the above
    Explanation
    Vitamin B5, also known as Pantothenic acid, is available in meat, broccoli, and avocados. Therefore, the correct answer is "All the above" as all of these food sources contain Vitamin B5.

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  • 13. 

    When eno salt is poured into the water, bubbles forms, which is due to- 

    • O₂ gas

    •  CO₂ gas

    •  CO gas

    • H₂ gas

    Correct Answer
    A.  CO₂ gas
    Explanation
    When eno salt is poured into water, bubbles form due to the release of carbon dioxide gas. Eno salt contains sodium bicarbonate and citric acid. When these two compounds come into contact with water, a chemical reaction occurs, resulting in the formation of carbon dioxide gas. The release of this gas creates bubbles in the water.

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  • 14. 

    Vitamin B1 (Thiamine) is available in 

    • Brown rice 

    • Potatoes 

    • Liver, eggs 

    • All the above

    Correct Answer
    A. All the above
    Explanation
    Vitamin B1, also known as Thiamine, is found in all the options mentioned - brown rice, potatoes, liver, and eggs. Brown rice is a good source of Thiamine as it contains the outer bran layer, which is rich in this vitamin. Potatoes also contain Thiamine, especially in their skin. Liver and eggs are also sources of Thiamine, making them suitable options for obtaining this vitamin. Therefore, all the options listed above provide Vitamin B1 (Thiamine).

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  • 15. 

    Which of the following Vitamin Causes Ariboflavinosis ? 

    • Vitamin B2 

    •  Vitamin D 

    • Vitamin C 

    • Vitamin A

    Correct Answer
    A. Vitamin B2 
    Explanation
    Vitamin B2, also known as riboflavin, causes a condition called Ariboflavinosis. This condition is characterized by symptoms such as sore throat, swollen and cracked lips, and red, itchy eyes. Vitamin B2 deficiency can occur due to poor diet, alcoholism, or certain medical conditions that affect the absorption of nutrients. Adequate intake of Vitamin B2 is essential for maintaining healthy skin, eyes, and nervous system, as well as for the production of red blood cells.

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  • 16. 

    Vitamin B5 is called? 

    • Pantothenic acid

    • Folic acid

    • Ratinol

    • Tocopherol 

    Correct Answer
    A. Pantothenic acid
    Explanation
    Pantothenic acid is the correct answer for the name of Vitamin B5. Pantothenic acid is a water-soluble vitamin that is essential for the metabolism of carbohydrates, proteins, and fats. It is involved in the synthesis of coenzyme A, which is necessary for the production of energy in the body. Pantothenic acid is found in a variety of foods, including meat, eggs, whole grains, and legumes. A deficiency of this vitamin can lead to symptoms such as fatigue, numbness, and tingling in the hands and feet.

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  • 17. 

    What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?

    • Radium dating

    • Uranium dating

    • Carbon dating

    • Deuterium dating

    Correct Answer
    A. Carbon dating
    Explanation
    Carbon dating is the correct answer because it is a method used to determine the age of organic materials from prehistoric periods. This technique relies on the measurement of the radioactive isotope carbon-14, which is present in the atmosphere and absorbed by living organisms. As the organism dies, the carbon-14 begins to decay at a predictable rate, allowing scientists to estimate the age of the material by comparing the remaining carbon-14 levels to those found in the atmosphere. This method is commonly used in archaeology and paleontology to determine the age of fossils, artifacts, and other remains.

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  • 18. 

    Vitamin A is called 

    • Thiamine 

    • Ratinol 

    • Riboflovin 

    • Pyridoxin

    Correct Answer
    A. Ratinol 
    Explanation
    Vitamin A is commonly known as Retinol, which is a type of retinoid. It plays a crucial role in maintaining good vision, promoting healthy growth and development, and supporting the immune system. Retinol is derived from animal sources, such as liver, fish oil, and dairy products, and is essential for normal functioning of the eyes, skin, and mucous membranes.

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  • 19. 

    Which of the following vitamin is essential for the development of red blood cells? 

    • Vitamin A 

    • Vitamin B12 

    •  Vitamin C 

    • Vitamin K

    Correct Answer
    A. Vitamin B12 
    Explanation
    Vitamin B12 is essential for the development of red blood cells. It plays a crucial role in the production of DNA and RNA, which are necessary for the formation of new red blood cells in the bone marrow. Without sufficient levels of vitamin B12, red blood cells may not mature properly, leading to a condition called megaloblastic anemia. Vitamin A is important for vision, Vitamin C is necessary for collagen production, and Vitamin K is involved in blood clotting, but they do not directly contribute to the development of red blood cells.

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  • 20. 

    Which of the following endocrine gland secretes Progesterone Hormone? 

    • Hypothalamus 

    • Anterior Pituitary 

    •  Parathyroid 

    • Ovary

    Correct Answer
    A. Ovary
    Explanation
    The correct answer is Ovary. The ovary is an endocrine gland that secretes the hormone progesterone. Progesterone plays a crucial role in the menstrual cycle and pregnancy. It helps prepare the uterus for implantation of a fertilized egg and maintains the uterine lining during pregnancy. Progesterone also regulates the menstrual cycle and is involved in the development and maturation of the female reproductive system.

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  • 21. 

    Which of the following endocrine gland secretes Adrenaline Hormone? 

    •  Hypothalamus 

    • Adrenal Medulla 

    • Anterior Pituitary 

    • Parathyroid

    Correct Answer
    A. Adrenal Medulla 
    Explanation
    The correct answer is Adrenal Medulla. The adrenal medulla is part of the adrenal glands, which are located on top of the kidneys. It is responsible for producing and secreting adrenaline hormone, also known as epinephrine. Adrenaline is a stress hormone that helps the body respond to stressful situations by increasing heart rate, blood pressure, and energy levels. It also plays a role in the fight or flight response.

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  • 22. 

    Which of the following lens is used to minimize Myopia? 

    •  Convex lens

    • Concave lens

    • Cylindrical lens

    • None of these

    Correct Answer
    A. Concave lens
    Explanation
    A concave lens is used to minimize myopia, also known as nearsightedness. Myopia occurs when the eyeball is too long or the cornea is too curved, causing light to focus in front of the retina instead of directly on it. A concave lens is thinner in the center and thicker at the edges, causing light rays to diverge before entering the eye. This helps to correct the focal point, allowing the light to focus directly on the retina, resulting in clearer distance vision for individuals with myopia.

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  • 23. 

    Cement is made hard with

    • Dehydration

    • Hydration and dissociation of water 

    • Dissociation of water

    • Polymerisation

    Correct Answer
    A. Hydration and dissociation of water 
    Explanation
    Cement is made hard through the process of hydration and dissociation of water. When cement is mixed with water, a chemical reaction occurs where water molecules react with the compounds in cement, forming new hydration products. This reaction leads to the formation of a solid matrix, making the cement hard and strong.

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  • 24. 

    The temperature of the sun is measured with 

    • Platinum thermometer

    • Pyrometer

    • Gas thermometer

    • Vapour pressure thermometer

    Correct Answer
    A. Pyrometer
    Explanation
    A pyrometer is used to measure the temperature of the sun because it is specifically designed to measure high temperatures. It works by measuring the intensity of thermal radiation emitted by an object. Since the sun is extremely hot, a pyrometer is the most suitable instrument to accurately measure its temperature. A platinum thermometer, gas thermometer, or vapor pressure thermometer would not be able to withstand the intense heat of the sun and provide an accurate measurement.

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  • 25. 

    Which of the following is the common disease in ground nut? 

    • Red Rot 

    • Tikka disease 

    • Wheat rust 

    • Blast of rice

    Correct Answer
    A. Tikka disease 
    Explanation
    Tikka disease is a common disease in groundnut. This fungal disease is caused by the pathogen Rhizoctonia bataticola. It primarily affects the leaves and stems of the groundnut plant, causing small, dark spots or lesions known as "tikka" on the plant's surface. These lesions can enlarge and coalesce, leading to defoliation and reduced yield. Tikka disease can be managed through cultural practices such as crop rotation, seed treatment, and maintaining proper plant spacing to reduce humidity and promote airflow. Fungicides can also be used as a control measure.

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  • 26. 

    How much carbon does steel contain? 

    • 0.1% – 1.5%

    •  7 – 10%

    • 10 – 50%

    • Zero

    Correct Answer
    A. 0.1% – 1.5%
    Explanation
    Steel typically contains carbon in the range of 0.1% to 1.5%. This percentage of carbon is added to improve the strength and hardness of the steel. The exact amount of carbon added depends on the desired properties of the steel and the specific manufacturing process used. Higher carbon content generally results in a harder and stronger steel, while lower carbon content makes the steel more ductile and easier to work with.

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  • 27. 

    The disease carrying agents are called

    • Vectors 

    • Pathogens 

    • Symptoms 

    • Reservoirs

    Correct Answer
    A. Vectors 
    Explanation
    Vectors are organisms that transmit diseases from one host to another. They can be insects, such as mosquitoes or ticks, or other animals like rodents. These organisms act as carriers of pathogens, which are the disease-causing agents, and can spread them to humans or other animals. Vectors play a crucial role in the transmission of many diseases, such as malaria, dengue fever, and Lyme disease. Understanding and controlling vectors is essential in preventing the spread of these diseases.

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  • 28. 

    Funk invented- 

    • Vitamins

    • Hormones

    • Proteins 

    • Enzymes

    Correct Answer
    A. Vitamins
    Explanation
    Funk is credited with discovering vitamins. In 1912, he isolated a substance from rice bran that was able to prevent a disease called beriberi. He named this substance "vitamine" (later changed to "vitamin") because he believed it was vital for life. This discovery led to the identification of other essential nutrients, known as vitamins, which are necessary for the proper functioning of the body.

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  • 29. 

    The animals which do not affected by the pahtogen carry pathogens for a long time are called 

    • Pathogens 

    • Symptoms 

    • Vectors 

    • Reservoirs

    Correct Answer
    A. Reservoirs
    Explanation
    Reservoirs refers to animals that carry pathogens for a long time without being affected by them. These animals act as a source of infection, as they can transmit the pathogens to other susceptible organisms. Reservoirs play a crucial role in the transmission and persistence of diseases, as they provide a continuous supply of pathogens. By understanding which animals act as reservoirs for specific pathogens, public health measures can be implemented to control the spread of diseases.

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  • 30. 

    Fertiliser having high nitrogen content is :

    •  Urea

    •  Ammonium sulphate 

    • Ammonium nitrate 

    • Calcium citrate

    Correct Answer
    A. Ammonium nitrate 
    Explanation
    Ammonium nitrate is a fertiliser that contains a high nitrogen content. It is commonly used in agriculture because nitrogen is an essential nutrient for plant growth. Nitrogen helps in the development of leaves and stems, and it is a crucial component of proteins, enzymes, and chlorophyll. Ammonium nitrate is highly soluble in water, making it easily absorbed by plants. Its high nitrogen content makes it an effective fertiliser for promoting healthy plant growth and increasing crop yields.

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  • 31. 

    Brass gets fade colour in air due to the presence of- 

    • Oxygen

    • Hydrogen Sulphide

    • Carbon dioxide

    • Nitrogen 

    Correct Answer
    A. Hydrogen Sulphide
    Explanation
    Brass gets faded color in air due to the presence of hydrogen sulfide. When brass comes into contact with hydrogen sulfide, a chemical reaction occurs, resulting in the formation of a thin layer of tarnish on the surface of the brass. This tarnish gives brass a faded or dull appearance. Hydrogen sulfide is commonly found in the atmosphere, especially in areas with high levels of pollution or near industrial areas.

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  • 32. 

    Mercury thermometers can be used to measure temperature up to 

    • 260°C

    •  100°C

    • 360°C

    • 500°C

    Correct Answer
    A. 360°C
    Explanation
    Mercury thermometers can be used to measure temperature up to 360°C because mercury has a high boiling point of 357°C. This means that the mercury inside the thermometer will not evaporate or expand significantly at temperatures below its boiling point, allowing for accurate temperature measurements up to 360°C.

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  • 33. 

    Which of the following elements is not essential for plant growth? 

    • Sodium

    • Potassium

    • Calcium

    • Magnesium

    Correct Answer
    A. Sodium
    Explanation
    Sodium is not essential for plant growth because it is not required for any vital plant processes. While other elements like potassium, calcium, and magnesium are essential for functions like photosynthesis, nutrient absorption, enzyme activation, and cell wall formation, sodium does not play a significant role in these processes. In fact, high levels of sodium can be toxic to plants and hinder their growth. Therefore, sodium is not considered an essential element for plant growth.

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  • 34. 

    The chemical used as a ‘fixer’ in photography is- 

    • Sodium sulphate

    • Sodium thiosulphate

    • Ammonium persulphate

    • Borax

    Correct Answer
    A. Sodium thiosulphate
    Explanation
    Sodium thiosulphate is used as a 'fixer' in photography because it is able to dissolve and remove any remaining silver halide crystals from the film or paper after development. This fixing process is important because it prevents further exposure to light, which could cause the image to darken or become discolored over time. Sodium thiosulphate is chosen for its ability to effectively remove the silver halide without damaging the image, making it an essential chemical in the development process.

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  • 35. 

    The speed of light will be minimum while passing through- 

    • Glass

    • Vacuum

    • Water

    •  Air

    Correct Answer
    A. Glass
    Explanation
    The speed of light is slower in a medium compared to vacuum. This is due to the interaction of light with the atoms or molecules of the medium, causing it to be absorbed and re-emitted multiple times. Glass is a denser medium compared to air, water, and vacuum, so the speed of light is further reduced when passing through it. Therefore, the speed of light will be minimum while passing through glass.

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  • 36. 

    For shaving, one uses- 

    • Concave mirror

    • Plain mirror

    • Convex mirror

    • None of these

    Correct Answer
    A. Concave mirror
    Explanation
    A concave mirror is used for shaving because it can produce magnified and virtual images. When a person stands in front of a concave mirror, the mirror reflects light rays in such a way that they converge at a point called the focal point. This creates a magnified image of the person's face, making it easier to see and shave small details. A plain mirror would not provide the magnification needed for precise shaving, while a convex mirror would produce a smaller and distorted image. Therefore, the correct answer is a concave mirror.

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  • 37. 

    “All the four quantum numbers of two electrons in an atom are not the same.” It is the law of —

    • Hund’s  

    • Exclusion Principle of Pauli

    • Uncertainty Principle of Hiesenberg

    • Avogadro’s Law

    Correct Answer
    A. Exclusion Principle of Pauli
    Explanation
    The correct answer is the Exclusion Principle of Pauli. This principle states that no two electrons in an atom can have the same set of four quantum numbers. These quantum numbers include the principal quantum number (n), azimuthal quantum number (l), magnetic quantum number (m), and spin quantum number (s). This principle helps to explain the organization of electrons in atomic orbitals and the filling of electron shells.

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  • 38. 

    What among following is used to produce artificial rain ?

    • Copper oxide

    • Carbon monoxide

    • Silver iodide

    • Silver nitrate 

    Correct Answer
    A. Silver iodide
    Explanation
    Silver iodide is used to produce artificial rain. When silver iodide is dispersed into the atmosphere, it acts as a cloud condensation nuclei, providing a surface for water vapor to condense around. This leads to the formation of clouds and eventually precipitation in the form of rain. Silver iodide has a similar crystal structure to ice, making it an effective catalyst for the formation of ice crystals in the clouds, which then grow and fall as raindrops.

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  • 39. 

    Which one of the following groups of compounds is called ‘accessory dietary factor”? 

    •  Fats

    • Hormones

    • Proteins

    • Vitamins

    Correct Answer
    A. Vitamins
    Explanation
    Vitamins are called "accessory dietary factors" because they are essential for the proper functioning of the body, but are required in small amounts compared to macronutrients like fats, proteins, and carbohydrates. They do not provide energy directly but play a crucial role in various physiological processes such as metabolism, growth, and immunity. Vitamins are not synthesized in sufficient quantities by the body, so they need to be obtained from the diet.

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  • 40. 

    The fungus produces small spores known as 

    •  Fronds 

    • Calyx 

    •  Conidia 

    • Ranvier

    Correct Answer
    A.  Conidia 
    Explanation
    Conidia are small spores produced by fungi. These spores are a means of reproduction and dispersal for the fungus. They are typically single-celled and can be produced in large numbers. Conidia are often carried by wind or water to new locations where they can germinate and grow into new fungal colonies. Therefore, the correct answer is Conidia.

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  • 41. 

    Which one of the following is the correct sequence of the given substances in the decreasing order of their densities? 

    • Steel > Mercury > Gold 

    • Gold > Mercury > Steel

    • Steel > Gold > Mercury

    • Gold > Steel > Mercury

    Correct Answer
    A. Gold > Mercury > Steel
    Explanation
    Gold has the highest density among the given substances, followed by mercury, and then steel. Therefore, the correct sequence in decreasing order of their densities is Gold > Mercury > Steel.

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  • 42. 

    Commercial nitric acid is coloured because it contains dissolved

    • Oxygen

    • Nitrous oxide

    •  Nitrogen dioxide

    • Coloured impurities

    Correct Answer
    A.  Nitrogen dioxide
    Explanation
    Commercial nitric acid is colored because it contains dissolved nitrogen dioxide. Nitrogen dioxide is a reddish-brown gas that dissolves in nitric acid, giving it a characteristic color. The presence of nitrogen dioxide in commercial nitric acid is due to impurities in the production process. These impurities can be caused by the reaction of nitrogen oxides with other compounds present in the production environment. The color of the nitric acid can vary depending on the concentration of nitrogen dioxide and other impurities present.

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  • 43. 

    The wave length extension of visible light is- 

    •  Between 200–900 nm

    • Between 250–850 nm

    • Between 300–800 nm 

    • Between 390–780 nm

    Correct Answer
    A. Between 390–780 nm
    Explanation
    The correct answer is "Between 390–780 nm." This is because the visible light spectrum ranges from approximately 390 nm (violet) to 780 nm (red). Within this range, different wavelengths correspond to different colors that can be perceived by the human eye.

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  • 44. 

    Leaf Blight in Rice is caused by 

    • Virus 

    • Bacteria 

    • Fungus 

    • Protozoa

    Correct Answer
    A. Bacteria 
    Explanation
    Leaf Blight in Rice is caused by bacteria. Bacterial leaf blight is a common disease in rice plants and is caused by the bacterium Xanthomonas oryzae. This bacterium infects the leaves of the rice plant, causing characteristic symptoms such as water-soaked lesions, yellowing, and wilting. Bacterial leaf blight can significantly reduce rice yields if not properly managed. Control measures include the use of resistant rice varieties, crop rotation, and proper sanitation practices.

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  • 45. 

    The temperature of a gas is measured with a 

    • Platinum resistance thermometer 

    • Pyrometer 

    • Gas thermometer

    • Vapour pressure thermometer

    Correct Answer
    A. Pyrometer 
    Explanation
    A pyrometer is used to measure the temperature of a gas. Unlike a platinum resistance thermometer, which is used to measure the temperature of solids and liquids, a pyrometer is specifically designed to measure the temperature of gases. A gas thermometer is also used to measure gas temperature, but a pyrometer is a more commonly used instrument for this purpose. A vapour pressure thermometer, on the other hand, is used to measure the temperature of substances based on their vapor pressure, and is not specifically designed for measuring gas temperature.

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  • 46. 

    What happens when a chemical bond is formed ?

    • Energy is always absorbed 

    • Energy in always released

    • More energy is released than is absorbed

    • Energy is neither released nor absorbed

    Correct Answer
    A. Energy is always absorbed 
    Explanation
    When a chemical bond is formed, energy is always absorbed. This is because the process of bond formation requires energy input to overcome the attractive forces between atoms and allow them to come closer together. This energy is absorbed from the surroundings, leading to a decrease in the overall energy of the system.

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  • 47. 

    Human eye is most sensitive to visible light of the wavelength 

    • 655nm

    • 555nm

    • 455nm

    • 755nm

    Correct Answer
    A. 555nm
    Explanation
    The human eye is most sensitive to visible light of the wavelength 555nm. This wavelength corresponds to the color green, which is why humans perceive green light more easily than other colors. The sensitivity to 555nm light is due to the distribution of photoreceptor cells in the retina, particularly the cone cells responsible for color vision. These cone cells are most responsive to green light, allowing humans to see this wavelength with greater clarity and sensitivity compared to other wavelengths.

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  • 48. 

    Baryllium Sulphate is less soluble in water due to

    • High inflammable energy

    • Low Energy of dissociation

    • Low inflammable energy

    • Lonic band

    Correct Answer
    A. High inflammable energy
    Explanation
    Baryllium sulfate is less soluble in water due to its high inflammable energy. This means that it requires a significant amount of energy to break the bonds between the beryllium and sulfate ions in the solid crystal lattice and allow them to dissolve in water. As a result, the solubility of beryllium sulfate in water is limited, making it less soluble compared to other compounds.

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  • 49. 

    Which of the following endocrine gland secretes Thyrotropin releasing hormone? 

    • Hypothalamus 

    • Parathyroid 

    • Posterior Pituitary 

    • Anterior Pituitary

    Correct Answer
    A. Posterior Pituitary 
    Explanation
    The correct answer is Posterior Pituitary. The hypothalamus secretes thyrotropin releasing hormone (TRH), which then stimulates the anterior pituitary to release thyroid-stimulating hormone (TSH). TSH, in turn, stimulates the thyroid gland to produce and release thyroid hormones. The posterior pituitary, on the other hand, does not directly secrete TRH.

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