Why Aeroplane windows are round?

Which famous Hollywood movie name is hidden in the below rebus?

Why do we preferably have round manhole covers and not square ones?

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

Can you count the number of squares in the given picture?

What is at the end of a rainbow?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

A woman shoots her husband.

Then she holds him under water for over 5 minutes.

Finally, she hangs him.

But 5 minutes later they both go out together and enjoy a wonderful dinner together.

How can this be?

What does Alexander the Great and Winnie the Pooh have in common?