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Chemistry 10th Class English Medium Online Test MCQs With Answers

Question # 1

Which one of the following compounds is an aldehyde?

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CH₃-CH₂-OH

CH₃-COOH

CH₃CHO

CH₃COCH₃

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Question # 2

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 # 3

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.

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C₃H₈

C₆H₁₂

C₄H₁₀

C₇H₁₆

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Question # 4

The product of any Lewis acid-base reaction is a single specie called:

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free radical

adduct

molecular ion

conjugate

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Question # 5

Temporary hardness is because of .

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Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

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Question # 6

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

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Question # 7

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

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Question # 8

Urea is nitrogenous fertilizer. It consist of nitrogen.

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26.6 %

36.6%

46.6%

56.6%

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Question # 9

Which is used for cleaning agent for domestic and commercial purpose?

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NaCl

Na₂CO₃

NaHCO₃

Na₂SiO₃

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Question # 10

The general formula of alkane is

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C_nH_2n+2

C_nH_2n-2

C_nH_2n

C_nH_2n+1

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Question # 11

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

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Question # 12

A strange bitter smell noticed near photo copier machine is of.

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H₂S

SO₂

O₂

O₃

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Question # 13

Which one is a pentahydroxy ketone?

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sucrose

glucose

fructose

lactose

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