What has many keys but can’t open a single lock?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

What demands an answer, but asks no questions

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

I am white when I am dirty, and black when I am clean. What am I?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?