__________ gas is released when coal is burnes in ln lack of Oxygen...? Mcqs

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__________ gas is released when coal is burnes in ln lack of Oxygen...?

(A) Carbon Dioxide
(B) Methane

(C) Ethene
(D) Carbon Monoxide

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which type of rock is made from molten(Fire) material within the earth surface...?

(A) Sedimentary rock
(B) Schist rock

(C) Igneous rock
(D) Metamorphic rock

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The distance between the optical centre of a convex lens and its principal focus is called its_______...?

(A) Focal Length
(B) Radius of Curvature

(C) Power
(D) Magnification

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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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The soapy touching property of substance are known as ____...?

(A) Acids
(B) Bases

(C) Salts
(D) Oxides

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If zero line of Vernier scale coincides with zero of main scale, then zero error is ______...?

(A) Positive
(B) Zero

(C) Negative
(D) One

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Chiken egg is composed of _______ cells...?

(A) One cell
(B) 100 cells

(C) 1000 cells
(D) One million cells

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What happens when two same poles of magnets are brought close to each other...?

(A) They attract
(B) They make an electric current flow

(C) They repel
(D) None

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1 nanometer = ...?

(A) 10-3 meter
(B) 10-6 meter

(C) 10-9 meter
(D) 10-12 meter

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Which group of animals has heterogametic females...?

(A) Domestic fowl
(B) Earthworm

(C) Rabbit
(D) None

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