Top 50 General Science GK Questions
General Science Questions
Q.61 Chemical formula for water is
(A) NaAlO2
(B) H2O
(C) Al2O3
(D) CaSiO3
Ans . B
Q.62 The gas usually filled in the electric bulb is
(A) nitrogen
(B) hydrogen
(C) carbon dioxide
(D) oxygen
Ans . A
Q.63 Washing soda is the common name for
(A) Sodium carbonate
(B) Calcium bicarbonate
(C) Sodium bicarbonate
(D) Calcium carbonate
Ans . A
Q.64 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
Ans . A
Q.65 Which of the gas is not known as a greenhouse gas?
(A) Methane
(B) Nitrous oxide
(C) Carbon dioxide
(D) Hydrogen
Ans . D[/correctAnswer
Q.66 Brass gets discolored in the air because of the presence of which of the following gases in air?
(A) Oxygen
(B) Hydrogen sulfide
(C) Carbon dioxide
(D) Nitrogen
Ans . B
Q.67 Which of the following is a non-metal that remains liquid at room temperature?
(A) Phosphorous
(B) Bromine
(C) Chlorine
(D) Helium
Ans . B
Q.68 Chlorophyll is a naturally occurring chelate compound in which central metal is
(A) copper
(B) magnesium
(C) iron
(D) calcium
Ans . B
Q.69 Which of the following is used in pencils?
(A) Graphite
(B) Silicon
(C) Charcoal
(D) Phosphorous
Ans . A
Q.70 Which of the following metals forms an amalgam with other metals?
(A) Tin
(B) Mercury
(C) Lead
(D) Zinc
Ans . B
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Rajesh Bhatia
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