What does below chemistry rebus means?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

What does a man do only once in his lifetime, but women do once a year after they are 29?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

Through your logical capabilities, can you make 7 an even?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?