What does the below image rebus riddle means ?

I have branches, but no fruit, trunk or leaves. What am I?

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?

What country can make you shiver?

A man is found dead with a knife in his back When the investigation is done. A chair lays beside him and the forensic team finds moisture around the body.

If he committed suicide, how did he do it?

Which is the correct shadow of the bird?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.