Question # 1

What is the pOH of Ca(OH)2, 0.02 M Solution.

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1.698

1.397

12.31

12.61

The coal in which the percentage of carbon is 60%

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Peat

Lignite

Bituminous

Anthracit

What percentage of nitrogen and oxygen is in the atmosphere.

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69%

79%

9%

89%

Which contains sufficient amount of metal?

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Mineral

Ores

Rocks

Soil

The substances formed during the chemical reaction are called.

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Product

Reactants

Radicals

Element

Mesosphere has a temperature range.

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17 ^oC - 58^oC

58^oC - 2^oC

2^oC - 93^oC

- 93^oC

Molecular formula of stearic acid is.

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C₁₅H₃₁ COOH

C₁₂H₁₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

Which acid is present in our stomach.

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Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

Oxidation of Ethene with KMnO₄ produces.

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Oxalic acid

Glyoxal

Ethene Glycol

Propene glycol

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Which of following is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

Chemical formula of matte will:

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Cu2S.FeS

Cu2S

Cu2O

FeS

Which of following dehydration of alcohols take place:

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NaOH

KOH

H₂SO₄

HCl

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