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

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Do You See It?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I make two people out of one. What am I?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?