What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

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

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

The dirtier I get, the whiter I look. Who am I?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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

What Word am I Looking For ?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

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