What can you catch but never throw?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

What number divided by 4 is the same as that number minus 4?

Which alphabet letter is a question?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

Can you divide the below-given shape into four equal and identical pieces?

Can you count the number of lines in the below picture?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

John was piloting a plane behind a car but was never able to overtake it. Why?