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

I know a nine-letter word having only one vowel.
Do you ?

I am quite hot but become too cold if you remove the first two letters. What am I?

Give it food and it will live; give it water and it will die.

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

What does below chemistry rebus means?

Find the missing letter in the last circle logically in the given below picture.