NDA || 2012 II PYSP

Match List I with List II and select the correct answer using the code given below the Lists :

Code :

Which one among the following does not have an allotrope?

Match List I with List II and select the correct answer using the code given below the Lists :

Code :

Consider the following statements:

1) Diamond is hard, and graphite is soft.

2) Diamond is soft, and graphite is hard.

3) Diamond is a bad conductor, but graphite is a good conductor.

4) Diamond is a good conductor, but graphite is a bad conductor.

Which of the statements given above is/are correct?

The most important raw materials used in the manufacture of cement are

Which one among the following equations is correctly balanced?

Three elements Na, S and O combine to form a compound Na₂SO₃. What is the valency of S in this compound?

Which one among the following is the equivalent weight of sulphuric acid?

(Atomic weight: H = 1, S = 32, O = 16)

Deionised water is produced by

Which one among the following is a double salt?