Chem 1st Paper Chap-3 (Test-2)
.
Questions and Answers
- 1.
নিচের কোনটি মেটালয়েড?
- A.
Mg
- B.
Sc
- C.
Si
- D.
Ar
Correct Answer
C. SiExplanation
Among the given options, Si (Silicon) is the only metalloid. Metalloids are elements that have properties of both metals and nonmetals. Silicon is a chemical element with atomic number 14 and it is a semiconductor, which means it can conduct electricity under certain conditions. Therefore, Si is the correct answer as it is the only metalloid among the given options.Rate this question:
-
- 2.
কোনটি আয়নিক যৌগের উচ্চ গলনাংক সহায়ক?
- A.
ক্ষুদ্র আয়নিক ব্যাসার্ধ
- B.
উচ্চ আয়নিক চার্জ
- C.
উচ্চ ফর্মুলা ওজন
- D.
উচ্চ চার্জ ঘনত্ব
Correct Answer
D. উচ্চ চার্জ ঘনত্বExplanation
The correct answer is "উচ্চ চার্জ ঘনত্ব" (High charge density). This is because a high charge density in an ionic compound indicates a greater concentration of charge per unit volume. This leads to stronger electrostatic attractions between ions, resulting in a higher melting point and boiling point for the compound.Rate this question:
-
- 3.
ছয় সন্নিবেশ সংখ্যার যৌগিক মুলকের জ্যামিতিক কাঠামো-
- A.
সরলরৈখিক
- B.
বর্গাকার
- C.
টেট্রাহেড্রাল
- D.
অক্টাহেড্রাল
Correct Answer
D. অক্টাহেড্রাল -
- 4.
CnH2n গোত্রীয় যৌগের H-C-H বন্ধন কোণ-
- A.
90
- B.
109.5
- C.
120
- D.
180
Correct Answer
B. 109.5Explanation
The correct answer is 109.5. The bond angle in a molecule with a general formula of CnH2n is approximately 109.5 degrees. This is because the carbon atom forms four sigma bonds, resulting in a tetrahedral geometry. In a tetrahedral arrangement, the bond angles between the carbon and hydrogen atoms are approximately 109.5 degrees.Rate this question:
-
- 5.
পারমাণবিক সংখ্যা বৃদ্ধির সাথে সাথে নিষ্ক্রিয় যৌগের স্ফুটনাংক-
- A.
হ্রাস পায়
- B.
বৃদ্ধি পায়
- C.
একই থাকে
- D.
হ্রাস পেয়ে বৃদ্ধি পাওয়া শুরু করে
Correct Answer
B. বৃদ্ধি পায়Explanation
পারমাণবিক সংখ্যা বৃদ্ধির সাথে সাথে নিষ্ক্রিয় যৌগের স্ফুটনাংক বৃদ্ধি পায়।Rate this question:
-
- 6.
কোনটি পানিতে অদ্রবণীয়?
- A.
Na2CO3
- B.
FeSO4
- C.
CaCO3
- D.
CaCl2
Correct Answer
C. CaCO3Explanation
CaCO3 is insoluble in water.Rate this question:
-
- 7.
কাঁচের সাথে বিক্রিয়াকারী মৌলের নাম-
- A.
Br
- B.
Na
- C.
F
- D.
Si
Correct Answer
C. FExplanation
The correct answer is F. This is because the question is asking for the name of the element that reacts with glass. The element that reacts with glass is fluorine (F).Rate this question:
-
- 8.
[Cu(en)2]2+ আয়নে তামার সন্নিবেশ সংখ্যা কত যেখানে en= ইথিলিন ডাইঅ্যামিন ?
- A.
1
- B.
2
- C.
4
- D.
6
Correct Answer
C. 4Explanation
The coordination number of [Cu(en)2]2+ ion is 4. This is because each ethylenediamine (en) ligand forms two coordinate bonds with the central copper ion, resulting in a total of four bonds. The coordination number represents the number of ligands directly bonded to the central metal ion in a complex.Rate this question:
-
- 9.
নিচের কোনটি f ব্লক মৌল নয়?
- A.
Ce
- B.
Th
- C.
Np
- D.
Sm
Correct Answer
B. ThExplanation
The element Th (Thorium) is not a f-block element. The f-block elements are also known as the inner transition metals and they consist of the lanthanides and actinides. Thorium is part of the d-block elements, specifically in Group 3. Therefore, it is not considered a f-block element and is not a part of the f-block series.Rate this question:
-
- 10.
SF4 অণুর সঠিক আকার-
- A.
দ্বিপিরামিড আকৃতির
- B.
বর্গাকার সমতলীয়
- C.
বিকৃত চতুস্তলকীয়
- D.
ত্রিকোণ পিরামিড আকারের
Correct Answer
C. বিকৃত চতুস্তলকীয়Explanation
The correct answer is "বিকৃত চতুস্তলকীয়" (distorted tetrahedral). This means that the molecule SF4 has a distorted tetrahedral shape. A regular tetrahedron has four identical bonds and no lone pairs, but in SF4, there is one lone pair of electrons on the central sulfur atom, causing the shape to be distorted.Rate this question:
-
- 11.
কোনটি নিরপেক্ষ অক্সাইড?
- A.
PbO2
- B.
BaO2
- C.
Fe2O3
- D.
None
Correct Answer
D. NoneExplanation
None of the given options are neutral oxides. PbO2 and BaO2 are both peroxides, which are considered as acidic oxides. Fe2O3 is an oxide of iron, which is a metal and generally forms basic oxides. Therefore, none of the options can be classified as a neutral oxide.Rate this question:
-
- 12.
লোহাকে মরিচার হাত থেকে রক্ষার জন্য কোন ধাতুর প্রলেপ দেয়া হয়?
- A.
Zn
- B.
Hg
- C.
Pb
- D.
Mn
Correct Answer
A. ZnExplanation
Zinc (Zn) is used as a protective coating for iron and steel to prevent corrosion. It acts as a sacrificial anode, meaning it corrodes in place of the iron or steel, thus protecting them from rusting. This process is known as galvanization. Therefore, applying a zinc coating or paste on iron or steel surfaces helps to protect them from corrosion, making it the correct answer.Rate this question:
-
- 13.
কোনটি বিরল মৃত্তিকা মৌল?
- A.
Zn
- B.
La
- C.
Cu
- D.
Ca
Correct Answer
B. LaExplanation
Among the given options, La (Lanthanum) is the rarest and most scarce mineral. It is a rare earth metal and is not commonly found in large quantities in nature. On the other hand, Zn (Zinc), Cu (Copper), and Ca (Calcium) are more abundant and commonly found minerals. Therefore, La is the rarest mineral among the given options.Rate this question:
-
- 14.
নিচের বন্ধনগুলার মধ্যে কোনটি শুন্য ক্রমের?
- A.
F2
- B.
N2
- C.
H-F
- D.
He2
Correct Answer
D. He2 -
- 15.
SF6 অণুতে S এর কোন ধরণের সংকরায়ন ঘটেছে?
- A.
Sp2d3
- B.
Sp3d2
- C.
D2sp3
- D.
Sp3
Correct Answer
B. Sp3d2Explanation
SF6 একটি হাইব্রিডাইজড মোলেকুল। এখানে, S অণুটি একটি কেন্দ্রীয় পাঁচটি p ওর্বিটাল এবং একটি d ওর্বিটাল ব্যবহার করে হাইব্রিডাইজড করে থাকে। সংকরায়নে, S অণুটির চারটি sp3 হাইব্রিড পাঁচটি p ওর্বিটালের সংকরায়িত ওর্বিটালের সাথে সংযুক্ত হয় এবং একটি d ওর্বিটালের সংকরায়িত ওর্বিটালের সাথেও সংযুক্ত হয়। সুতরাং, সঠিক উত্তরটি sp3d2।Rate this question:
-
- 16.
পর্যায় সারণির কোন ব্লকে অধাতুকে স্থান দেয়া হয়েছে?
- A.
S
- B.
P
- C.
D
- D.
F
Correct Answer
B. P -
- 17.
N,O, F এর ২য় আয়নীকরণ শক্তির সঠিক ক্রম-
- A.
N>O>F
- B.
O>F>N
- C.
F>O>N
- D.
N>F>O
Correct Answer
C. F>O>NExplanation
The correct order of the second ionization energy for N, O, and F is F > O > N. This means that it requires the most energy to remove a second electron from F, followed by O, and then N. This order is determined by the number of protons in the nucleus and the electron configuration of each element. F has the highest number of protons, making it the most difficult to remove an electron from. O has one less proton than F, making it easier to remove an electron. N has the least number of protons, making it the easiest to remove an electron.Rate this question:
-
- 18.
কোন ধাতুতে 4f বা 5f আংশিক ভাবে পূর্ণ নয়?
- A.
Cm
- B.
Cu
- C.
Am
- D.
Gd
Correct Answer
B. CuExplanation
The elements in the f-block of the periodic table, including the 4f and 5f series, have incomplete electron configurations. Copper (Cu) belongs to the d-block and has a completely filled 3d orbital. Therefore, it does not have any f-orbital electrons and is not considered as having partial or complete 4f or 5f electron configurations.Rate this question:
-
- 19.
বেনজিন অণুর সঞ্চারণশীল ইলেক্ট্রন কোন অরবিটাল থেকে আসে?
- A.
1s
- B.
2p
- C.
Sp2
- D.
Sp
Correct Answer
B. 2pExplanation
The correct answer is 2p. In the electron configuration of an atom, the first number represents the principal energy level (n) and the letter represents the sublevel. The sublevel 2p indicates that the electron is in the second principal energy level (n=2) and in the p sublevel.Rate this question:
-
- 20.
NH4+ আয়নের আকৃতি-
- A.
চতুস্তলকীয়
- B.
ত্রিভুজাকার
- C.
ত্রিকোণ পিরামিড
- D.
সরলরৈখিক
Correct Answer
A. চতুস্তলকীয়Explanation
The correct answer is "চতুস্তলকীয়" which means "tetrahedral" in English. This term refers to a molecular shape in which there are four atoms or groups of atoms bonded to a central atom, arranged in a tetrahedral shape. In the case of NH4+, the central nitrogen atom is bonded to four hydrogen atoms, forming a tetrahedral shape.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Aug 27, 2023Quiz Edited by
ProProfs Editorial Team -
Jul 23, 2020Quiz Created by
Shuvro Chakravorty
Hydrogen Valency Quiz: Test Your Chemical Bonding Knowledge
Hydrogen Valency Quiz: Test Your Chemical Bonding Knowledge
How Much Do You Know About Van der Waals Forces? Quiz
How Much Do You Know About Van der Waals Forces? Quiz
Hund's Rule Demystified: Electron Configuration Challenge
Hund's Rule Demystified: Electron Configuration Challenge
Simple Present Tense Quiz: Learn and Test Your Skills
Simple Present Tense Quiz: Learn and Test Your Skills
What Should I Get For Christmas? Take the Quiz Now
What Should I Get For Christmas? Take the Quiz Now
- Aeronautics Quizzes
- Aerospace Quizzes
- Agricultural Science Quizzes
- Astrology Quizzes
- Astronomy Quizzes
- Atom Quizzes
- Biochemistry Quizzes
- Biology Quizzes
- Biomechanics Quizzes
- Biostatistics Quizzes
- Biotechnology Quizzes
- Botany Quizzes
- Branches Of Science Quizzes
- Cytology Quizzes
- Easy Science Quizzes
- Ecology Quizzes
- Electrical Quizzes
- Embryology Quizzes
- Endocrinology Quizzes
- Engineering Quizzes
- Environmental Science Quizzes
- Epidemiology Quizzes
- Experiment Quizzes
- Forestry Quizzes
- Fossil Quizzes
- Gas Quizzes
- General Science Quizzes
- Genetics Quizzes
- Histology Quizzes
- Human Biology Quizzes
- Integrated Science Quizzes
- Invention Quizzes
- Library Science Quizzes
- Lighting Quizzes
- Liquid Quizzes
- Marine Biology Quizzes
- Microbiology Quizzes
- Molecular Biology Quizzes
- Nature Quizzes
- Neuroscience Quizzes
- Nuclear Science Quizzes
- Oceanography Quizzes
- Physics Quizzes
- Psychology Quizzes
- Science And Technology Quizzes
- Science Glossary Quizzes
- Science Knowledge Quizzes
- Science Practice Quizzes
- Scientific Method Quizzes
- Scientific Notation Quizzes
- Soil Science Quizzes
- Solar System Quizzes
- Solid Quizzes
- Toxicology Quizzes
- Zoology Quizzes