What does below chemistry rebus means?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

In The Image Below Which clock is the odd one out?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

Spot the cat in the picture below

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

What do you think with the below Picture ?