What is a mixture of potassium nitrate Charcoal and Sulphur called...? Mcqs

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What is a mixture of potassium nitrate Charcoal and Sulphur called...?

(A) Paint
(B) Aluminum

(C) Brass
(D) Gunpowder

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Examples of magnetic materials are_______...?

(A) Iron, Nickel and Cobalt
(B) Gold, Aluminum and Copper

(C) Earth
(D) All of these

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Which gas is used in refrigerators for cooling...?

(A) Chlorofluorocarbon
(B) Nitrogen

(C) Helium
(D) Tetrafluoroethene

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Which gas is used in fire extinguisher...?

(A) Nitrogen
(B) Carbon Dioxide

(C) Oxygen
(D) Nitrogen

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Which of the following gases is most predominant in the Sun...?

(A) Helium
(B) Hydrogen

(C) Nitrogen
(D) Ozone

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Which gas is used to make soda water...?

(A) Ammonia
(B) Hydrogen

(C) Nitrogen
(D) Carbon Dioxide

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Which is the hardest among following...?

(A) Radium
(B) Diamond

(C) Graphite
(D) Gold

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What type of acid is used in car batteries...?

(A) Hydrochloric acid
(B) Hydrofluoric acid

(C) Nitric acid
(D) Sulphuric acid

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What is the temperature of “Liquid Nitrogen”...?

(A) 0 °C
(B) 37 °C

(C) – 196 °C
(D) None of these

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The process by which a substance absorbs moisture upon exposure to atmosphere is called:...?

(A) Deliquescence
(B) Efflorescence

(C) Dehydrogenation
(D) Desalination

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