Question # 1

Which of the following is a secondary pollutant.

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CO₂

CO

SO₃

HF

Traces of acetylene are present in coal gas about.

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0.06 %

0.08%

1.1%

90%

The base which is used in alkaline batteries is.

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NaOH

Al(OH)₂

KOH

Mg(OH)₂

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

A reaction between an acid and base produce.

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Salt and water

Salt and gas

Salt and acid

Salt and bases

Methyl butanoate smell like.

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Apple

Mange

Lemon

Grapes

The percentage of water in human body is about:

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60%

50%

70%

80%

The earth atmosphere is getting hotter because of :

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SO₂

O₃

CO₂

CO

Water has a maximum density at .

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10^oC

0^oC

4^oC

100^oC

When the magnitude of Kc is very large in indicates.

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Reaction never go to completion

Reaction is in equilibrium state

Reaction will complete after some time

Reaction has almost to completion

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

The ability of carbon atoms to form chains or ring called.

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Hydrogenation

Chlorination

Cantenation

Halogenation

Chemical formula of Stearic acid.

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C₁₅H₃₁COOH

C₁₇H₃₅COOH

C₁₅H₃₇COOH

None of them

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