Which of the following is used in normal pencils...? Mcqs

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Which of the following is used in normal pencils...?

(i) Graphite
(ii) Silicon

(iii) Charcoal
(iv) Slate

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Examples of magnetic materials are_______...?

(i) Iron, Nickel and Cobalt
(ii) Gold, Aluminum and Copper

(iii) Earth
(iv) All of these

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A matter can exist in which of the following forms...?

(i) Liquid
(ii) Solid

(iii) Gas
(iv) All of these

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Which gas is used in refrigerators for cooling...?

(i) Chlorofluorocarbon
(ii) Nitrogen

(iii) Helium
(iv) Tetrafluoroethene

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Soap and detergents remove the dirt from clothes due to...?

(i) Capillary action
(ii) Osmosis

(iii) Diffusion
(iv) Lowering of interfacial tension

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Low silicon, oxygen and High iron, magnesium are the characteristics ____of magma...?

(i) Mafic and Felsic
(ii) Felsic and Rhyoltic

(iii) Mafic and Basaltic
(iv) None of these

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Which of the following gases is most predominant in the Sun...?

(i) Helium
(ii) Hydrogen

(iii) Nitrogen
(iv) Ozone

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What makes a lemon sour...?

(i) Tartaric acid
(ii) Citric acid

(iii) Acetic acid
(iv) Hydrochloric acid

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What is the study of fossils called...?

(i) Paleontology
(ii) Archaeology

(iii) Geology
(iv) Anthropology

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What is Nuclear Fission...?

(i) Atom splits into two masses
(ii) Small atoms join each other

(iii) Helium broken into proton and electron
(iv) All of these

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