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

John is the son of Jacob.
So,
Jacob is the_____of John's father?

What do you call a fish without an eye?

what's the probability of getting a king or a queen from a pack of 52 cards?

What does below chemistry rebus means?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

What has lots of eyes, but can’t see?

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