What does below chemistry rebus means?

Remove two matchsticks to make the below equation correct.

John was drowned by he was not wet. How?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

what does the below rebus mean?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Which is the correct shadow of the bird?

500 women soldiers are arranged in an array of ten rows and fifty columns in accordance with their respective heights. Now, the tallest woman from each row is asked to move out in the front. From them, the shortest one is labelled as Alpha. They are then asked to resume their original position.

Now, the shortest woman in each column is asked to come out in front. The tallest among them is labelled as Beta.

Can you find out if Alpha will be taller or Beta?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?