Question # 1

Acid means

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Sour

Bitter

Sweet

Salty

Which of the following statement s is not true about fossil fuels?

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they all contain carbon

They are renewable

they produce pollutants when burnt

they cause acid rain

Sodium zeolite is resin of:

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NaAl(SiO₃)₂

KAl(SiO₃)₂

LiAl(SiO₃)₂

RbAl(SiO₃)₂

When bones are heated they give.

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Starch

Gelatin

Fats

Oils

Global warming causes rising of the sea level. The cause of global warming is.

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

Bronsted and Lowry presented their theories of acids and bases in

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1785

1787

1923

1925

In the beginning the rate of reverse reaction is

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Negligible

Moderate

Very fast

Slow

Chemical formula of Stearic acid.

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C₁₅H₃₁COOH

C₁₇H₃₅COOH

C₁₅H₃₇COOH

None of them

Temporary hardness is removed by adding.

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Quick lime

Slaked lime

Lime stone

Lime water.

The percentage by volume of nitrogen in dry gas is.

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78.09%

20.94%

0.93%

0.03%

Water of crystallization is responsible for.

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Melting points of crystals2

Boiling point of crystal

Shape of crystal

Transition points of crystals

Which chemical is called king of chemicals?

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KNO₃

H₂SO₄

HCl

NHO₃

Coal is blackish complex mixture of compounds of

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Carbon

Hydrogen

oxygen

All

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