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. Neutron

 
 
 
 

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

 
 
 
 

3. 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.

 
 
 
 

4. 1 u or 1 amu means

 
 
 
 

5. The maximum number of electrons in L shell is

 
 
 
 

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

 
 
 
 

7. Atomic radius is measured in nano-meters and

 
 
 
 

8. Which among the following formulae is wrong?

 
 
 
 

9. What is the latin name of iron ?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

12. 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

 

 
 
 
 

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

 
 
 
 

14. What is the valency of Ar?

 
 
 
 

15. 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.

 
 
 
 

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