The freezing point of water on a centigrade scale is...? Mcqs

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The freezing point of water on a centigrade scale is...?

(A) 0°C
(B) 1°C

(C) -1°C
(D) 5°C

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Cooking gas is mixture of which of the following two gases...?

(A) Methane & Carbon dioxide
(B) Oxygen & Nitrogen

(C) Butane & Propane
(D) Oxygen & Methane

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It is not advisable to sleep under a tree at night because of the release of:...?

(A) more oxygen
(B) less oxygen

(C) Carbon dioxide
(D) Carbon monoxide

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What makes a lemon sour...?

(A) Tartaric acid
(B) Citric acid

(C) Acetic acid
(D) Hydrochloric acid

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Diamond is an allotropic form of:...?

(A) Germanium
(B) Carbon

(C) Silicon
(D) Sulphur

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Exoskeleton of a marine snail is composed of...?

(A) Calcium Sulphate
(B) Calcium Carbonate

(C) Sulphur Dioxide
(D) None of these

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Bronze is an alloy of...?

(A) Copper and Bronze
(B) Lead and Tin

(C) Copper and Tin
(D) None of these

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Which of the following has the maximum density...?

(A) Water
(B) Ice

(C) Benzene
(D) Chloroform

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Solid can be converted directly to the gaseous state. This process is known as:...?

(A) Sublimation
(B) Evaporation

(C) Condensation
(D) Diffusion

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What is most common salt in sea water...?

(A) Calcium barbonate
(B) Potassium Chloride

(C) Sodium Chloride
(D) Magnesium Sulphate

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