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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

Temporary hardness is due to the presence of bicarbonates of.

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Calcium

Magnsium

Both of them

None of them

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Question # 3

Enzymes are proteins which have the following properties except.

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They catalyze reaction

They are highly non-spcific

They are highly efficient

They are pro

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Question # 4

Reactions which have comparable amounts of reactants and products at equilibrium state have:

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very small Kc value

Very large Kc value

Moderate Kc value

None of these

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Question # 5

General formula of alkyl radical is

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C_nH_2n+2

C_nH_2n-2

C_nH_2n+1

C_nH_2n

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Question # 6

Acids have taste

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Bitter

Seetish

Sour

Saltish

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Question # 7

The nature of enzyme is.

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Protein

Vitamin

Fats

Carbohydrate

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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

Olefins is a Latin word meaning:

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inert

less reactive

oil forming

most reactive

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Question # 10

Acetic acid is used for:

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Elching designs

Clearing metals

Flavouring food

Making explosives

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Question # 11

Depending upon temperature variation, atmosphere ins divided into how many regions?

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Question # 12

The process which convert vegetable oil into banaspati ghee called.

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Hydrogenation

Halogenation

a and b

None of these

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Question # 13

Which one of the following is polmerized to from benzene?

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ethane

ethene

methane

ethyne

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