What does below chemistry rebus means?

I look at you, you look at me, I raise my right, you raise your left. What am I?

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

Find the last number in the series below:

voN luJ yaM raM ---

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

No matter how little or how much you use me, you change me every month. What am I?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

What is next number in the pattern below:

131 517 192 123 ?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.