Elements And Metals : 3

Question 6 :

Water is a good solvent of ionic salts because


A). it has a high specific heat
B). it has no colour
C). it has a high dipole moment
D). it has a high boiling point
Answer : Option C

Question 7 :

Which of the following is not an isotope of hydrogen?


A). Tritium
B). Deuterium
C). Protium
D). Yttrium
Answer : Option D

Question 8 :

The main constituents of pearls are


A). calcium oxide and ammonium chloride
B). calcium carbonate and magnesium carbonate
C). aragonite and conchiolin
D). ammonium sulphate and sodium carbonate
Answer : Option B

Question 9 :

Amalgams are


A). highly coloured alloys
B). alloys which contain mercury as one of the contents
C). alloys which have great resistance to abrasion
D). alloys which contain carbon
Answer : Option B

Question 10 :

Which of the following is the lightest metal?


A). Mercury
B). Lithium
C). Lead
D). Silver
Answer : Option B