what does this below rebus represent identXQQQQQME

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Buy me, smell me or deliver me, I do not change.

Who am I?

What can you see in the middle of March and April that you can never see in any other month?

How can you leave a room with two legs and return with six legs?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

What month of the year has 28 days?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

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