GS QUIZ

[1] Bromine is a
A. black solid
B. red liquid
C. colourless gas
D. highly inflammable gas
Ans - B

[2] The hardest substance available on earth is
A. Gold
B. Iron
C. Diamond
D. Platinum
Ans - C

[3] The variety of coal in which the deposit contains recognisable traces of the original plant material is
A. bitumen
B. anthracite
C. lignite
D. peat
Ans - D

[4] Tetraethyl lead is used as
A. pain killer
B. fire extinguisher
C. mosquito repellent
D. petrol additive
Ans - D

[5]  Which of the following is used as a lubricant?
A. Graphite
B. Silica
C. Iron Oxide
D. Diamond
Ans - A

[6] The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
A. Argon
B. Xenon
C. Helium
D. Krypton
Ans - C
 
[7] The gases used in different types of welding would include
A. oxygen and hydrogen
B. oxygen, hydrogen, acetylene and nitrogen
C. oxygen, acetylene and argon
D. oxygen and acetylene
Ans - D

[8] The property of a substance to absorb moisture from the air on exposure is called
A. osmosis
B. deliquescence
C. efflorescence
D. desiccation
Ans - B

[9] In which of the following activities silicon carbide is used?
A. Making cement and glass
B. Disinfecting water of ponds
C. cutting very hard substances
D. Making casts for statues
Ans - C

[10] The average salinity of sea water is
A. 3%
B. 3.5%
C. 2.5%
D. 2%
Ans - B