Dioptre is a unit of measurement for __________ ...? Mcqs

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Dioptre is a unit of measurement for __________ ...?

(A) Current
(B) Lens

(C) Force
(D) Focal Length

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Organisms that eat all the dead and waste products and returning useful elements to soil and environment are known as...?

(A) Decomposers
(B) Producers

(C) Consumers
(D) None

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Main use of salt in diet is to : ___________...?

(A) ease the process of cooking
(B) increase the taste

(C) produce small amount of hydrochloric acid required for digestion
(D) inclease solubility of food particles in water

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Vector quantities have _____ along with magnitude and unit....?

(A) Magnitude
(B) Direction

(C) Both a and b
(D) None of them

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The smallest particle of any substance having all properties of that molecules is called...?

(A) An atom
(B) A molecule

(C) A compound
(D) An element

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Herbivores that eat only...?

(A) Plants
(B) Animals

(C) Both A and B
(D) None of these

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Light Emitting Diode (LED) is a ___ semiconductor device ....?

(A) 3 lead
(B) 4 lead

(C) 7 lead
(D) 2 lead

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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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Friction opposes motion between two bodies in contact because of ______...?

(A) Charges on bodies
(B) Weight of bodies

(C) Roughness of surfaces
(D) None of above

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Ozone is a gas found in the layer...?

(A) Troposphere
(B) Mesosphere

(C) Stratosphere
(D) Exosphere

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