How can you make a TV, a bed, a dog, and a car liquid?

Spot 5 differences in two Christmas tree below:

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

What does this rebus means ?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

Can you count the number of quadrilaterals in the picture below?

Can you identify if it's a murder or a suicide ?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?