Solve below rebus puzzle?

Spot the cat in the picture below

John was drowned by he was not wet. How?

What does this rebus puzzle means ?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

I know a nine-letter word having only one vowel.
Do you ?

What does this rebus mean?

O
N
C
E
TIME

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Solve this riddle by finding the odd one out from the rest.