What does below chemistry rebus means?

It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten-digit numbers.

But do you know how many of these numbers are prime?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

A farmer and his neighbour once went to Emperor Akbar"s court with a complaint. "Your Majesty, I bought a well from him," said the farmer pointing to his neighbour, "and now he wants me to pay for the water."
"That"s right, your Majesty," said the neighbour. "I sold him the well but not the water!"?
The Emperor asked Birbal to settle the dispute. How did Birbal solve the dispute?

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

Find the next number in the following series:
6, 14, 26, 98, __?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Can you tell a 3D object that has just two surfaces?