What does below chemistry rebus means?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Using eight eights and addition only, can you make 1000?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

What is the next number in this series?

4,12,84,3612....

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

what does the below rebus means?