MEDIUM
6th ICSE
IMPORTANT
Earn 100

The formula of a molecule of oxygen is

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Important Questions on Elements and Compounds

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6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>Exercise For Revision>Q 3
The valency of an element is always
EASY
6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>Exercise For Revision>Q 4
The valency of an inert gas is
MEDIUM
6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>Exercise For Revision>Q 5
Which of the following information do we not get from the chemical formula of a compound?
HARD
6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>Exercise For Revision>Q 1

Complete the table given below:

S.No. Compounds Formula Elements present
1. Water    
2. Common salt    
3. Ammonia    
4. Vinegar    
5. Hydrochloric acid    
6. Sulphuric acid    
7. Nitric acid    
8. Sodium hydroxide    
9. Calcium hydroxide    
MEDIUM
6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>EXERCISE>Q 1
Define metalloids, noble gases and atomicity.
MEDIUM
6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>EXERCISE>Q 2

Classify the following elements as metals, non-metals, and metalloids:

oxygen, arsenic, mercury, sodium, antimony, carbon, silicon, zinc, silver, nitrogen

MEDIUM
6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>EXERCISE>Q 3
List any five uses of elements.
MEDIUM
6th ICSE
IMPORTANT
Exploring Chemistry-6>Chapter 3 - Elements and Compounds>EXERCISE>Q 4
Give reason argon or neon is filled in electric bulbs.