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Top 50 General Science GK Questions

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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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