Question # 1

Bister copper is pure about;

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70%

80%

90%

98%

Salt makes the water permanently hard.

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CaSO₄

Ca(HCO₃)₂

NaHCO₃

NaCO₃

In which of the following groups , oxygen is attached on both sides with carbon atoms.

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Ketone group

Ether group

Aldehyde group

Easter group

Stearic acid present in

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Apple

Fats

Urine

Grapes

Hard water can cause.

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Stomach disorder

Boiler blasts

Inefficiency of engine

All of them

Margarine is produced by adding hydrogen to vegetable oil at.

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2000 ^oC

100^oC

200^oC

1000^oC

Halogenation of methane on the presence of diffused sunlight takes place.

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Only in one step

Slowly in one step

Freshly in two steps

In a series of four steps

Molecular formula of butyne is .

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C₄H₆

C₃H₄

C₄H₇

C₄H₈

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

The ability of carbon atoms to form chains is called.

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Isomerism

Catenation

Resonance

Condensation

Acid means

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Sour

Bitter

Sweet

Salty

Which one of the following is not air pollutants?

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N₂

CO

NO₂

O₂

The alkanes consisting of C₅ to C₁₀

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gases

liquids

solid

plasma

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