Questions

Which of the following is usually not an air­pollutant?

What is the action of dry HCl gas on dry litmus paper?

 In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

At one time, the lock industry here flourished and locks (was exported) on a major scale.

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'.

We can make donations to NGOs (1)/ that are engaged in planting trees, (2)/ or in anyway work towards saving the environment. (3)/ No error (4)

Which of the following represents the most complex trophic level?

Which drug is used to cure Migraine?

The work done in one complete revolution of the moon around the earth is equal to

After a credit card transaction has been authorized by theissuing bank by sending an authorization code to themerchant, the settlement stage of the process begins. Whichof the following is a system type used to process suchstatements?