MEDIUM
7th CBSE
IMPORTANT
Earn 100

Is the equation: Na + H2O  NaOH + H2 balanced? Why?

Important Questions on Structure of Matter

MEDIUM
7th CBSE
IMPORTANT
Atoms of elements
MEDIUM
7th CBSE
IMPORTANT
A molecule of water
MEDIUM
7th CBSE
IMPORTANT
There are about 118 different
EASY
7th CBSE
IMPORTANT
If you heat a liquid, it will ultimately change into
HARD
7th CBSE
IMPORTANT
When two elements are brought together, they
MEDIUM
7th CBSE
IMPORTANT
Which of the following is not a mixture?
MEDIUM
7th CBSE
IMPORTANT

The valency of which of these elements is zero?

MEDIUM
7th CBSE
IMPORTANT
Which of these is the formula for calcium hydroxide?