Match list (i) with list (ii) and select the chemicals found in the products using the code given below the lists:

List (i) Products - List (ii) Chemicals

I. Gypsum - 1) Silicon Dioxide

II. Cement - 2) Calcium Sulphate

III. Pyrex Glass - 3) Iron and Carbon

IV. Steel - 4) Boron

The Soda-acid fire extinguisher contains

Consider the following statements.

1) The element carbon forms a very large number of compounds.

2) Air holes of a gas burner have to be adjusted when the heated vessel get blackened by the flame.

3) Use of synthetic detergents does not cause pollution of water.

Which of the above statements are true?

Which one of the following is not a periodic property i.e. does not show any trend on moving from one side to the other in the periodic table?

Pentanoic acid is commonly called ________.