What does below chemistry rebus means?

What does below rebus means ?

What is the fastest way to double your money?

Can you find the thief by just looking at the picture below?

What kind of band never plays music?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

In a town, there are over 100 flats.
Flat-1 is named first flat.
Flat-2 is named second flat.
Flat-3 is named third flat.

A visitors 'Victor' decides to walk through all the flats, he finds all the flats except flat-62.
Victor later founds that the local of the town have given it another name.

What is the name of the Flat?

what does the below rebus means?

When can we add 2 to 11 and get 1 as the correct answer?