Class 9 Atoms and Molecules MCQ Quiz Set 2

MCQ Quiz – 2 MCQ Quiz – 1 Notes Important Questions NCERT Solutions

Atoms and Molecules Quiz – 2

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1. Which of the following is not equal in mass to the 116th part of an oxygen atom?

 
 
 
 

2. Atomic radius is measured in nano-meters and

 
 
 
 

3. Neutron

 
 
 
 

4. In which of the following compounds, formula unit mass is considered instead of molecular mass ?

 
 
 
 

5. What is the latin name of iron ?

 
 
 
 

6. What is the valency of Ar?

 
 
 
 

7. Three-fourth mass of a substance contains the same number of molecules as in a certain mass of Sulphur dioxide. Identify the substance among the following.

 
 
 
 

8. What would be the gram molecular mass of solid sulphur?

 
 
 
 

9. 1 u or 1 amu means

 
 
 
 

10. The maximum number of electrons in L shell is

 
 
 
 

11. Which among the following formulae is wrong?

 
 
 
 

12. Which pairs of elements have gram molecular mass same as gram atomic mass?

 
 
 
 

13. Name the salts which contain the same number of ions per molecule as magnesium nitride.

(i) Aluminium phosphate

(ii) Potassium sulphite

(iii) Barium phosphate

(iv) Ferric chromate

 

 
 
 
 

14. Which among the following is not a postulate of Dalton’s atomic theory?

 
 
 
 

15. A metal can form two Sulphides. In one Sulphide, the metal and Sulphur atoms are in the ratio of 2:1. In the other, the metal and Sulphur atoms are in the ratio 2:3. The metal which complies with the above compounds is.

 
 
 
 

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