What is always in front of you but can’t be seen?

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?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?