What is at the end of a rainbow?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I have eight fingers and two thumbs but I do not live. What Am I?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

What English word has three consecutive double letters?

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

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

I taste better than I can smell. Who am I?