What is both possible and impossible at the same time?

What is the word or phrase?

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

There is something which you can be arrested for attempting but not for successfully completing.

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

Find the hidden panda in the image below.

What is wrong in the below Picture?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

What has hands, but can’t clap?