1000 Best General Science MCQ-Questions
Q9). Quartz crystals normally used in quartz clocks etc. is chemically
a).silicon dioxide
b).germanium oxide
c).a mixture of germanium oxide and silicon dioxide
d).sodium silicate
Correct Answer:
silicon dioxide
Explanation:
Q10). Which of the gas is not known as green house gas?
a).Methane
b).Nitrous oxide
c).Carbon dioxide
d).Hydrogen
Correct Answer:
Hydrogen
Explanation:
Q11). Bromine is a
a).black solid
b).red liquid
c).colourless gas
d).highly inflammable gas
Correct Answer:
red liquid
Explanation:
Q12). The hardest substance available on earth is
a).Gold
b).Iron
c).Diamond
d).Platinum
Correct Answer:
Diamond
Explanation:
Q13). 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
Correct Answer:
peat
Explanation:
Q14). Tetraethyl lead is used as
a).pain killer
b).fire extinguisher
c).mosquito repellent
d).petrol additive
Correct Answer:
petrol additive
Explanation:
Q15). Which of the following is used as a lubricant?
a).Graphite
b).Silica
c).Iron Oxide
d).Diamond
Correct Answer:
Graphite
Explanation:
Q16). 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
Correct Answer:
Helium
Explanation: