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10th Class Chemistry English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

Ozone depletion was first noticed is.

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1970's

1980's

1990's

1960's

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Question # 2

General formula of Alkane is.

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C₁₀H_2n-2

C₆H₂₆

C₁₁H_2n-2

C_nH_2n-2

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Question # 3

Dehydrohalogenation take place in the presence of.

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Aqueous NaOH

Alcoholic KOH

Aqueous KOH

Alcoholic NaOH

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Question # 4

These are safe source of food and energy for body during emergency.

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Proteins

Vitamins

Carbohydrats

Lipids

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Question # 5

The base which is used in alkaline batteries is.

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NaOH

Al(OH)₂

KOH

Mg(OH)₂

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Question # 6

The process by which atmospheric nitrogen is turned into nitrates in the soil is called.

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Nitration

Fixing

Oxidation

Reduction

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Question # 7

A salt is not composed of

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A metallic cation

Non -metallic anion

an anion of a base

An anion of an acid

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Question # 8

Natural gas is 85% methane, It is used to make the follwing except.

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Carbon black

Ethane

Propane

Both b and c

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Question # 9

Incomplete combustion of alkanes produces.

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Carbon dioxide only

Carbon monoxide only

Carbon monoxide and carbon black

Carbon dioxide and carbon black

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Question # 10

Which one of these pollutants are not found in car exhaust fumes?

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CO₂

O₃

NO₂

SO₂

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Question # 11

On hydrolysis sucrose produces one unit of glucose and one unit of.

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Fructose

Starch

Cellulose

None of them

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Question # 12

The end product of oxidation of acetylene is.

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Propen glycol

Ethan glycol

Glyoxal

Oxalic acid

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Question # 13

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

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