Why normal rain is slightly acidic...? Mcqs

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Why normal rain is slightly acidic...?

(A) due to presence of dust in air
(B) carbon dioxide and water in clouds react to form carbonic acid

(C) Ozone depletion
(D) All of these

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In onion pink color is due_____ ...?

(A) anthocyanin
(B) Carotene

(C) Xanthophylls
(D) None of these

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The causes of the echo is _____...?

(A) Absorption
(B) Dispersion

(C) Reflection
(D) Refraction

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The amount of heat needed to convert a substance from liquid to gas is called...?

(A) Heat of vaporization
(B) Specific heat

(C) Latent heat of fusion
(D) All

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When in the part of its orbit closest to the Sun, Pluto has an atmosphere of nitrogen and methane similar to Triton’s, but what happens when it is farther from the Sun ...?

(A) These gases are not present
(B) These gases are like plasma

(C) These gases are frozen
(D) These gases are volatile

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How many joule are there in one calorie...?

(A) 2.6
(B) 2.8

(C) 4.2
(D) 3.4

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Non-metals of ____ group are gases....?

(A) VI-A
(B) VII-A

(C) VIII-A
(D) VIII-B

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The good sources of Vitamin-C are________...?

(A) green leafy vegetables
(B) seeds

(C) fresh vegetables and fruits
(D) sea foods

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Jupiter has ________ known moons....?

(A) 62
(B) 73

(C) 79
(D) 53

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Which of the following is a homo atomic...?

(A) H2
(B) NH3

(C) H2O
(D) CO2

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