When blue litmus paper dipped acids, its colour change to ____...? Mcqs

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When blue litmus paper dipped acids, its colour change to ____...?

(A) Pink
(B) Blue

(C) Yellow
(D) Red

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Which is the best indication that a chemical reaction has taken place...?

(A) Blue powder turns water blue
(B) Metal budding when placed in an unknown liquid

(C) A white substance dissolving in water
(D) None

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For being able to see three-dimensional pictures we have to use___________...?

(A) A binocular
(B) A camera

(C) A epidiascope
(D) A stereoscope

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How many rows in the modern Periodic Table...?

(A) 5
(B) 6

(C) 7
(D) None of these.

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Which among the following waves is used for communication by artificial satellites ...?

(A) Micro waves
(B) Radio waves

(C) A. M.
(D) Infra-red waves

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What is the escape velocity on Earth...?

(A) 7.9 km/s
(B) 9.8 km/s

(C) 11.2 km/s
(D) 12.4 km/s

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Hypocotyl hook is formed during the germination of...?

(A) Bean Seed
(B) Maize Seed

(C) Apple Seed
(D) None

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What happens to the molecules of a gas when the gas changes into a liquid...?

(A) They move closer and lose energy
(B) They move closer and gain energy

(C) They move apart and lose energy
(D) They move apart and gain energy

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During the process, more water will also evaporate and convert to a gaseous state of water called the...?

(A) Water Liquid
(B) Water Solid

(C) Water Vapour
(D) Water Ice

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Naturally occurring enzyme used as a defense chemical by bacteria ______...?

(A) Defense protein
(B) Restriction enzyme

(C) Hydrolytic enzyme
(D) Ligase enzyme

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