What does below chemistry rebus means?

The dirtier I get, the whiter I look. Who am I?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

Which country gets ill every time?

Which city is three-fifths chick two third cat and 50% goat?