Class 9 Atoms and Molecules MCQ Quiz Set 1

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

Atoms and Molecules Quiz – 1

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1. How many moles are present in 560 g of iron?

 
 
 
 

2. Which of the following has maximum number of atoms ?

 
 
 
 

3. According to the law of definite proportions, ________.

 
 
 
 

4. What is the mass of grams of 3 moles of N ?

 
 
 
 

5. All samples of carbon dioxide contain carbon and oxygen in the mass ratio 3:8 this is in agreement with the law of

 
 
 
 

6. The number of atoms present in a one molecule of a substance is called

 
 
 
 

7. The density of liquid mercury is 13.6 g/cm3  How many moles of mercury are there in 1 litre of the metal ? (atomic mass of Hg = 200)

 
 
 
 

8. The atomic mass of sodium is 23. The number of moles in 46 g of sodium is

 
 
 
 

9. Molecular mass is defined as the

 
 
 
 

10. How many times an atom of sulphur is heavier than an atom of carbon?

 
 
 
 

11. Which of the following represents 12 u?

 
 
 
 

12. What is the latin name of sodium?

 
 
 
 

13. The molecule having an atomicity of 4 is:

 
 
 
 

14. How many grams of sodium will have the same number of atoms as 6 grams of magnesium ? (Na =23 , Mg =24)

 
 
 
 

15. Identify the correct one from the following statements.

 
 
 
 

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