Decode below rebus
D
N
A
T
S , D

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

What does below chemistry rebus means?

What demands an answer, but asks no questions

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A word I know has six letters it contains, remove one letter and 12 remain. What is it?

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?

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(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

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I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?