MCQ Atomic and Molecular Mass Chapter 4 Class 9 Science

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MCQ’s For All Chapters – Science Class 9th

1. There will be total 14 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Which of the following is correct pair of elements and its symbol?

Your comments:

Question 1 of 14

2. Valency of hydrogen is 1 and that of sulphur is 2. What should be the formula of hydrogen sulphide?

Your comments:

Question 2 of 14

3. One atomic mass unit is a mass unit equal to exactly one twelfth (1/12th) the mass of one atom of ___________.

Your comments:

Question 3 of 14

4. Which of the following is the correct IUPAC symbol for the element Cobalt?

Your comments:

Question 4 of 14

5. Which one of the following is the modern symbol of Gold?

Your comments:

Question 5 of 14

6. A particle M has 18 electrons, 20 neutrons and 19 protons. This particle must be a:

Your comments:

Question 6 of 14

7. NaCl molecule is made of which of the following ions?

Your comments:

Question 7 of 14

8. Valency of Calcium element is:

Your comments:

Question 8 of 14

9. Chemical formula of a compound is A2B3. The valency of A is:

Your comments:

Question 9 of 14

10. What is the atomic mass of nitrogen?

Your comments:

Question 10 of 14

11. Assertion : One mole of SO2 contains double the number of molecules present in one mole of O2
Reason : Molecular weight of SO2 is double to that of O2

Question 11 of 14

12. Assertion : Law of conservation of mass holds good for all the reactions.
Reason : It states that energy can neither be created nor destroyed in a chemical reaction.

Question 12 of 14

13. Assertion: Carbonates are polyatomic ions.

Reason: The carbonate ion consists of one carbon atom and three oxygen atoms and carries an overall charge of -2.

Question 13 of 14

14. Assertion : All noble gases are monatomic.
Reason : Noble gases are highly stable and unreactive.

Question 14 of 14


 

Comments

  1. Varenyan Garg says:
    February 24, 2025 at 1:29 am

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    Reply
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    January 26, 2025 at 1:41 am

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    January 20, 2025 at 6:10 pm

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