What is the degree of rotation of the earth each hour...? Mcqs

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What is the degree of rotation of the earth each hour...?

(A) 1°
(B) 5°

(C) 7.5°
(D) 15°

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A _____ is used in submarines to monitor the surface of water....?

(A) Periscope
(B) Telescope

(C) Kaleidoscope
(D) Binoculars

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The height of the troposphere varies between ____________....?

(A) 7 km at equator and 17 km at poles
(B) 17 km at equator and 7 km at poles

(C) 18 km at equator and 8 km at poles
(D) 8 km at equator and 18 km at poles

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Which of the following phenomena occur when a small amount of acid is added to water...?

(A) Precipitation and Neutralization
(B) Evaporation and Condensation

(C) Sublimation and Deposition
(D) Dilution and Ionisation

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Glass is made of the mixture of______________...?

(A) Quartz and Mica
(B) Sand and Salt

(C) Sand and Silicates
(D) None of these

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The most abundant element in sea water is...?

(A) Chlorine
(B) Sodium

(C) Sulfur
(D) Magnesium

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One of the following is a water soluble vitamin...?

(A) Vitamin A
(B) Vitamin D

(C) Vitamin K
(D) None

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Huge cloud of gass and dust in the universe is called...?

(A) Constellation
(B) Satellite

(C) Meteorite
(D) Nebula

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A bacterium that lives in the intestines of human beings and animals is called...?

(A) Lactobacillus acidophilus
(B) Escherichia coli

(C) Staphylococcus aureus
(D) Bacillus subtilis

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What percentage of earth’s water supply is fresh water___________...?

(A) 3%
(B) 5%

(C) 21%
(D) None of these

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