Question # 1

The reason of acid rain is:

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release of CO in excess by in complete combustion

excess release of NO₂ and SO₂ from burning of fossil fuels

Formation of NH₃ in excess form industry and coal gas

Formation of excess CO₂ due to combustion and respiration

Which one of following statement about three about three states of matter is incorrect?

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in solids the particles vibrate about fixed positions

energy is released when a gas turns back to a liquid

particles in gases move in a random manner

the closer particles are together, smaller the force of attraction between them

Which of the following does not give yellow precipitate with I2+ NaOH

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Acetone

Benzaldehyde

Acetildehyde

Acetophenone

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

Coinage metals Cu, Ag and Au are the least reactive because they have

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Negative reduction potential

Negative oxidation potential

Positive reduction potential

Positive oxidation potential

Test of incomplete combustion of petrol in the presence of

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CO₂

SO₂

NO₂

Co

Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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The high molecular weight materials which yield on hydrolysis the amino acids is called:

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Carbohydrates

Lipids

Fatty acids

Proteins

The transition temperature of tin is

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95.5 C°

13.2 C°

13.2°C

128.5°

Part of fresh water consumed in domestic purpose:

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1%

2%

69%

8%

Covalent solids are composed of

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Ions

Different molecules

Neutral atoms

Diethyl ether

Acetic acid is manufactured by the fermentation of

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Ethanol

Methanol

Ethanal

Methanal

The bond order in No is 2.5 while that in NO⁺is 3.Which of the following statements is true for these two species?

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Bond length in NO⁺is greater than in NO

Bond length in unpredictable

Bond length in NO⁺is equal to that in NO

Bond length in NO is greater than in NO⁺

Which behaves ass insulator for animals body?

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Carbohydrates

Protiens

Fats

skin

Composition of clay in cement is:

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25%

50%

75%

80%

Which is not a fossil fuel

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Petroleum

Coal

Natural gas

None of them

Which three elements are needed for the healthy growth of plants?

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N,S,P

N,Ca, P

N,P,K

N,K,C

The natural fertilizers consist of

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Plants

Animals

Both plants and animals

Microorganisms

Strong oxidizing agents have

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Greater positive value of standard reduction potential

Lesser positive value of standard

Greater negative value of standard

None of these

Surfactants are organic compounds, used in detergents which reduce the

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Viscosity of water

Surface tension of water

Boiling point of water

Wetting ability of water

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2-bromonitrobenzene

2-nitrobromobenzene

1-bromonitrobenzene

1-nitrobromobenzene

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

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