Elements and Metals


Chemical formula for water is

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


Which of the following is an element?

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


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


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

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


Which of the following is the lightest metal?

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