What does below chemistry rebus means?

Three friends named Mr. Black, Mr. Yellow and Mr. Green enter a pub on a weekend night. They are wearing either a Black, Yellow or Green shirt.

Mr. Yellow says to them, 'Did you notice that we all are wearing different color shirts than our names?'

To this, the man who was wearing the Green shirt said. 'Wow, thats right.'

Can you identify who is wearing which colour shirt ?

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

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?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

The cream is heavier than Milk. True or False?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?