Question # 1

Which of one the following is Lewis base?

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BF3

H+

NH3

Ag+

What is the POH of a 0.02 M Ca(OH)₂?

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1.698

1.397

12.31

12.61

In an irreversible reaction dynamic equilibrium:

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Never establishes

Established before the completion of reaction

Establishes after the completion of reaction

Establishes readily

The lives of aquatic plants and animals are indirectly related to concentration of dissolved gas in water.

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Nitrogen

Hydrogen

Oxygen

Carbon

Which one is not the fraction of residual oil?

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Paraffin wax

Asphalt

Fuel oil

Coke

The carbon contents in lignite is.

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80%

50%

60%

70%

Main component of natural gas is

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Methane

propane

Butane

Propene

The rate of reverse reaction in the beginning.

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Slow

moderate

Very fast

Low

Phenolphthalein produces red colour in

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Acid

Base

Both a and b

None of these

soap is the sodium salt of long chain.

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Amino acids

Fatty acids

Nucleotides

None of them

Which is not an air pollutant?

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CO₂

CO

SO₂

NH₃

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

Which is a Lewis base?

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H⁺

NH₄

BF₃

AlCl₃

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