Questions

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Writing or drawings scribbled, scratched, or sprayed illicitly on a wall or other surface in a public place

Name the respiratory organs of insects

Which river does not form a delta?

On which river is the Tehri dam built?

What is the other name of sodium carbonate?

Ammonium nitrate, on thermal decomposition, produces :

What is the chemical formula of Ozone?

In the following question, a sentence has been given in Active/Passive voice. Out of the four alternatives suggested, select the one which best
expresses the same sentence in Passive/Active voice.
I have kept all your old letters.