Elements and Metals

1

Chemical formula for water is

A. NaAlO2
B. H2O
C. Al2O3
D. CaSiO3

2

Which of the following is an element?

A. Ruby
B. Sapphire
C. Emerald
D. Diamond

3

Potassium Permanganate is used for purifying drinking water, because

A. it is a sterilising agent
B. it dissolves the impurities of water
C. it is a reducing agent
D. it is an oxidising agent

4

Which of the following metals remain in liquid for under normal conditions?

A. Radium
B. Zinc
C. Uranium
D. Mercury

5

Which of the following is the lightest metal?

A. Mercury
B. Lithium
C. Lead
D. Silver