What can you catch but never throw?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Why is it against the law for a man living in Delhi to be buried in Mumbai?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

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?

What is so fragile that saying its name breaks it?

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

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?