Questions

Which of the following green house gases has the greatest heat-trapping ability?

Iron and manganese present as pollutants in water cannot be removed by_____

The common name of lead (II) sulphide is

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

To let someone off

Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it.

The philosophy of putting another's welfare above one's own.

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

Radium is so expensive that you (1)/ could be a millionaire if you own (2)/ only half a pound of it! (3)/ No error (4)

In the following question, four words are given out of which one word is correctly spelt. Select the correctly spelt word.

The World Braille Day is observed across the world every year on ______.