The ratio of pure gold in 18 carat gold is _______________...? Mcqs

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The ratio of pure gold in 18 carat gold is _______________...?

(A) 0.5
(B) 0.9

(C) 0.8.5
(D) 0.75

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The breakdown of food molecules to release energy is called...?

(A) Photosynthesis
(B) Fermentation

(C) Respiration
(D) Mitosis

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Rate of evaporation of petrol is greater than that of water at room temperature because:...?

(A) petrol molecules do not have any hydrogen bond
(B) petrol is an organic compound

(C) water molecules have small size
(D) petrol molecules have greater size

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The part of an eye acting as a aperture of camera is _____...?

(A) Iris
(B) Pupil

(C) Cornea
(D) Retina

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Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere...?

(A) Carbon dioxide
(B) Chlorofluorocarbons

(C) Nitrogen oxides
(D) Methane

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The process of making copies of DNA is called...?

(A) Transcription
(B) Replication

(C) Mutation
(D) Translation

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The example of stem which run horizontally on surface of soil to produce vegetatively...?

(A) Mint
(B) Ginger

(C) Onion
(D) Bryophyllum

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When a liquid is placed in a container, the pressure applied to the fluid by the container is equal throughout the container is the statement of _____...?

(A) Archimedes' Principle
(B) Bernoulli's Principle

(C) Boyle's Law
(D) Pascal's Law

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Which type of reaction produces the most harmful radiation...?

(A) Fusion reaction
(B) Fission reaction

(C) Chemical reaction
(D) Photo-Chemical reaction

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Sunlight is made of__________colours...?

(A) Seven colours
(B) Five colours

(C) Three colours
(D) Non of these

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