What does below chemistry rebus means?

A man dies of old age on his 25 birthday. How is this possible?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

What is red and smells like blue paint?

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

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

In the given picture, in how many ways can you read the word "Tiger"?

If an electric train is travelling south, then which way is the smoke going?

Solve the following series:
AZ, GT, MN, __, YB