Substance in Common Use

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(1) Chemical name of common salt.

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(a) HCl

(b) NH₄Cl

(d) H₂SO₄

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2) The pH value less than 7 then it is …………in nature.

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(a) Acidic

(b) Basic

(d) None of these

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(3) Chemical formula of sodium bicarbonate is………

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(a) NaHCO₃

(b) NaCO₃

(d) NaOH

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(4) Common salt is…………

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(a) Gray colour

(b) Grey colour and amorphous nature

(d) Colourless and amorphous nature

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5) The common name of CaOCl₂ is

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(a) Baking soda

(b) Washing soda

(d) Bleaching powder

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6) The chemical formula of borax is

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(a) Na₂B₅O₇.10H₂O

(b) Na₂B₄O₇.10H₂O

(d) B₂Ca₄O₇.10H₂O

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(7) Glauber’s salt is also known as

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(a) Sodium chloride

(b) Barium chloride

(d) Calcium sulphate

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(8) ………. is a radioactive element.

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(a) Radium

(b) Nitrogen

(d) Magnesium

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(9) Scientist Willard discovered ………….. radiation

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(a) Alpha radiation

(b) Beta radiation

(d) Delta radiation

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(10) A charge on alpha rays is………….

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(a) +2

(b) -1

(d) -2

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