What does below chemistry rebus means?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

You see me once in June, twice in November, and not at all in May. What am I?

what one word does the below rebus identifies?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?