Building blocks of matter that join to form molecules

Building blocks of matter that join to form compound

Elements carrying positive charged ion

Elements carrying negative charged ion

Hardest Trivia Questions On Chemistry For 11th Grade

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Quizzes Created: 1462 | Total Attempts: 834,384

Questions: 10 | Attempts: 401 | Updated: Oct 22, 2024

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Hardest Trivia Questions On Chemistry For 11th Grade - Quiz

Chemistry is study of matter:it's composition, properties, and reactivity. It is the science that involve elements and compound composed of atoms, molecules and ions. Many people think of chemist as being white coated scientists mixing strange liquids Ina laboratory but the truth is we are all chemist. Try out this quiz. Good luck!

Questions and Answers

1.

What is an atom?
- A.
  
  Building blocks of protein
- B.
  
  Building block of calcium
- C.
  
  Building blocks of matter that join to form molecules
- D.
  
  Building blocks of matter that join to form compound
Correct Answer
C. Building blocks of matter that join to form molecules

Explanation
Atoms are the smallest units of matter that retain the chemical properties of an element. They are the building blocks of matter and join together to form molecules through chemical bonds. Molecules, in turn, can be simple or complex and can include elements from different atoms. Therefore, the correct answer is "Building blocks of matter that join to form molecules."

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2.

Which of the following is not part of the component of Atom?
- A.
  
  Proton
- B.
  
  Neuron
- C.
  
  Electron
- D.
  
  Ion
Correct Answer
D. Ion

Explanation
An ion is not a part of the components of an atom. Atoms are made up of three main components: protons, neutrons, and electrons. Protons and neutrons are found in the nucleus of the atom, while electrons orbit around the nucleus. Ions, on the other hand, are formed when an atom gains or loses electrons, resulting in a positive or negative charge. While ions are related to atoms, they are not considered a fundamental component of an atom itself.

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3.

Which one does proton carry?
- A.
  
  Positive electric charge
- B.
  
  Negative electric charge
- C.
  
  Neutral charge
- D.
  
  Semi positive charge
Correct Answer
A. Positive electric charge

Explanation
Protons are subatomic particles found in the nucleus of an atom. They carry a positive electric charge, which is equal in magnitude to the negative charge carried by electrons. This positive charge of protons is essential for maintaining the overall electrical neutrality of an atom, as the number of protons in an atom determines its atomic number and defines its identity as a specific element.

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4.

What does electron Carry?
- A.
  
  Positive electric charge
- B.
  
  Negative electric charge
- C.
  
  Neutral charge
- D.
  
  Semi positive charge
Correct Answer
B. Negative electric charge

Explanation
Electrons carry a negative electric charge. This is a fundamental property of electrons, which are subatomic particles that orbit the nucleus of an atom. The negative charge of electrons is equal in magnitude to the positive charge of protons, which are also present in the nucleus. This charge difference between electrons and protons creates the electrical forces that hold atoms together and allow for the flow of electric current in conductors.

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5.

Which of the following can cause changes in atomic nucleus?
- A.
  
  Physical reaction
- B.
  
  Chemical reaction
- C.
  
  Nuclear reaction
- D.
  
  Fission reaction
Correct Answer
C. Nuclear reaction

Explanation
Nuclear reactions can cause changes in the atomic nucleus. Unlike physical and chemical reactions, which involve changes in the arrangement of electrons or the physical state of matter, nuclear reactions involve changes in the nucleus itself. These reactions can result in the release of large amounts of energy and can lead to the formation of different isotopes or even different elements. Fission reactions, a type of nuclear reaction, involve the splitting of a heavy nucleus into two smaller nuclei, releasing a significant amount of energy in the process.

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6.

What determines the number of an element in the period?
- A.
  
  Number of electron in its atom
- B.
  
  Number of proton in it's atom
- C.
  
  Number of neuron in its atom
- D.
  
  Non of the above
Correct Answer
B. Number of proton in it's atom

Explanation
The number of an element in the period is determined by the number of protons in its atom. This is because the number of protons in an atom, also known as the atomic number, determines the element's identity. Each element has a unique number of protons, which determines its place in the periodic table and its position in a specific period. Therefore, the correct answer is the number of protons in its atom.

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7.

Which are cations?
- A.
  
  Elements carrying positive charged ion
- B.
  
  Metals
- C.
  
  Elements carrying negative charged ion
- D.
  
  Non of the above
Correct Answer
A. Elements carrying positive charged ion

Explanation
Cations are ions that have a positive charge. In chemistry, ions are formed when atoms gain or lose electrons. When an atom loses one or more electrons, it becomes positively charged and is called a cation. Therefore, elements carrying positive charged ions are cations. Metals are often cations because they tend to lose electrons and form positive ions. On the other hand, elements carrying negative charged ions are called anions. None of the above options mentioned in the question are anions, hence the correct answer is "Elements carrying positive charged ion."

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8.

Which of the following is a cation?
- A.
  
  O2-
- B.
  
  He2+
- C.
  
  Cl-
- D.
  
  Fl-
Correct Answer
B. He2+

Explanation
He2+ is a cation because it has a positive charge. Cations are formed when an atom loses electrons, resulting in a net positive charge. In the case of He2+, helium (He) has lost two electrons, leaving it with a +2 charge. The other options, O2-, Cl-, and Fl-, are anions because they have negative charges, indicating that they have gained electrons.

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9.

Which of the following is an anion?
- A.
  
  He2+
- B.
  
  Na+
- C.
  
  K+
- D.
  
  Cl-
Correct Answer
A. He2+
10.

What determines the isotope of am element?
- A.
  
  Number of electron
- B.
  
  Number of proton
- C.
  
  Number of neurons
- D.
  
  Non of the above
Correct Answer
C. Number of neurons

Explanation
The correct answer is "Number of neurons." Isotopes are variants of an element that have the same number of protons but different numbers of neutrons. Therefore, the number of neutrons in an element's nucleus determines its isotope. The number of electrons and protons remains the same for all isotopes of an element.

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