Question # 1

Which one of the following does not contain starch

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Sugar cane

Maize

Barley

Potatoes

Which type of reactions take place in both directions?

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Addition reactions

Reversible reactions

Irreversibel reactions

Decomposition reactions

The strong heating of coal in retoris in the absence of air is called.

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Fractional distillation

Sublimation

Roasting

Destructive distillation

Which is not a part of flue gas?

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Furans

Dioxins

HCl

H₂SO₄

The number of carbon atoms present in petroleum gas.

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1-2

1-3

1-4

1-5

The percentage of protein in dry weight of cell.

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20%

40%

50%

70%

Which hydrocarbon decolorizes the pink colour of acidic solution of potassium permanganate?

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CH₄

C₂H₄

C₂H₆

C₂H₅

The reaction goes from left to right , if:

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Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

Which gas saves the surface of earth from ultra violet radiation?

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CO₂

CO

N₂

O₃

Which pollutant is not found in car exhaust gases?

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CO

O₃

NO₂

SO₃

Which is used to manufacture of soap?

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NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Which of one of the following is used as as fumigant:

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Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

____________ use for ripening of fruits.

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Ethene

Ethane

Ethyne

Propane

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