The change from liquid to solid, or the reverse of melting, is called...? Mcqs

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The change from liquid to solid, or the reverse of melting, is called...?

(A) Melting
(B) Freezing

(C) Evaporation
(D) Condensation

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Which of the following gas mainly responsible for ozone layer depletion...?

(A) Chlorofluorocarbon
(B) CO2

(C) Nitrogen oxide
(D) Sulphur dioxide

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Cell organelle found in animal cell and help intracellular digestion...?

(A) Lysosome
(B) Ribosomes

(C) Mitochondria
(D) Golgi apparatus

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About ______ of the body weight of a mammal is water....?

(A) 70%
(B) 75%

(C) 80%
(D) 90%

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Plants do exchange of gases through ______...?

(A) Roots
(B) Stomata

(C) Stem
(D) All of these

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1 tonne = _____ kg...?

(A) 100
(B) 400

(C) 1000
(D) 4000

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Star gets denser and hotter ultimately changing into helium by process of ____...?

(A) Nuclear fusion
(B) Nuclear Fission

(C) Radioactive decay
(D) Chemical reaction

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Scientific reasoning based on “if-then” statement called...?

(A) Inductive reasoning
(B) Deductive reasoning

(C) Scientific reasoning
(D) None

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In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called ...?

(A) Chemical Reaction
(B) Nuclear reaction

(C) Fission nuclear reaction
(D) Fusion nuclear reaction

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In what year did Galileo first use an optical telescope to study the moon...?

(A) 1492
(B) 1609

(C) 1212
(D) 1743

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