What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

A bomb exploded in a room full of married couples and no one died. How?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

What is black when you buy it, red when you use it, and gray when you throw it away?

Solve the mathematical equation in the picture below.

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

When can we add 2 to 11 and get 1 as the correct answer?

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