Question # 1

75% atmosphere mass lies in how many kilometers.

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11 km

30 km

50 km

85 km

Which of the following is a secondary pollutant.

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CO₂

CO

SO₃

HF

The organic compound used as drugs to control bleeding are.

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Vitamins

Proteins

Lipids

Glycerides

The base which is used in alkaline batteries is.

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NaOH

Al(OH)₂

KOH

Mg(OH)₂

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

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

How many % age of nitrogen in urea fertilizers?

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40.6

45.6

46.6

50

Water is a;

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strong electrolyte

non-electrolyte

weak electrolyte

natural compound

Which one of the following is not faction of crude oil.

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Paraffin wax

Asphalt

Fuel oil

Petroleum coke

Extraction of metals from its ores is called.

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Metallurgy

Mining

Griding

All

Ozone depletion was first noticed is.

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1970's

1980's

1990's

1960's

The reaction in which the products do not recombine to form reactants are called.

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Inversible reactions

Reversible reaction

Decomposition

Addition

By which process alkenes are prepared from alcohols:

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Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

Which one of the following cannot by hydrolyzed?

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Polysacchrides

Monosacchrides

Oligosacchrides

All of these

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