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?

What goes up but never comes down?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

By using 'because' continuously three times, can you make an English statement ?

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