Elements And Metals : 3

Question 11 :

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

A). Radium
B). Zinc
C). Uranium
D). Mercury
Answer : Option D

Question 12 :

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
Answer : Option D

Question 13 :

Which of the following is an element?

A). Ruby
B). Sapphire
C). Emerald
D). Diamond
Answer : Option D