Question # 1

According to Lewis concept a base is a substance which can donate.

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Proton

Electron pair

Neutron

Electron

pH of neutral solution is always.

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6

5

7

10

Which one of the following is Lewis base?

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NH₃

BF₃

H⁺

AlCl₃

All acids turn blue litmus.

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Red

Blue

Pinck

White

Which acid is used for etching designs on copper plates?

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H₂SO₄

HNO₃

HCl

CH₃COOH

A base is a substance which neutralizes and acid. Which of these substances is not a base?

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aqueous ammonia

Sodium chloride

Sodium carbonate

Calcium oxide

When Bronsted and Lowry put forward acid base concept?

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1913

1923

1933

1943

Basic solution have pH value.

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Less than 7

Greater than 7

equal to 7

None of these

The product of Lewis acid-base reaction is called adduct. The bond between the adduct species is.

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Ionic

Covalent

Metallic

Co-ordinate covalent

The reaction between an acid and a base produces.

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Salts and water

Salt and gas

Salt and an acid

Salt and an base

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Chemistry 10th Class English Medium Unit 10 Online Test MCQs With Answers

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