MEDIUM
7th CBSE
IMPORTANT
Earn 100

If a certain compound has a formula H2X, what is the valency of X?

Important Questions on Structure of Matter

MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q B
In a compound of two elements, the elements are combined in a certain fixed ratio that always remains the same.
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q B
MgO+HCl→MgCl2+H2O is a balanced equation. True or false?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q C
When will two elements on being mixed together form a compound? 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q C
Why are the properties of different compounds so different from each other? 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q C
Why are most elements not found in the free state in nature?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q C
How can you form iron sulphide from a mixture of iron and sulphur?
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7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q C
What does a formula represent?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 3 - Structure of Matter>EXERCISES>Q C
Define valency in terms of hydrogen.