What does below chemistry rebus means?

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?

Out of four images which one is the odd one out?

what does the below rebus mean?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

What goes up but never comes down?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

What month of the year has 28 days?