Question # 1

When CO₂ is passed through the ammonical brine the only salt that precipitates is:

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NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

Which gas is in involved in ozone depletion?

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Nitrogen

CFC's

Chlorine

All of them

___________ is not green house effect.

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Increase of food chain

increase atmospheric pressure

Increase of sea level

Increase of flood risks

The range of temperature in burning solid waste burning in incinerators is.

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650 ^oC - 1000 ^oC

650^oC - 11000^oC

1000^oC - 2000^oC

650^oC - 1000^oC

5000^oC - 1000^oC

When Bronsted and Lowry put forward acid base concept?

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1913

1923

1933

1943

Swimming pools are cleaned by a process:

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Hydrogenation

Bromination

Chlorination

Nitration

Dehalogenation of Tetrahalides takes place in the presence of .

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K

Mg

Na

Zn dust

Condensed formula of ethane is.

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C₃H₈

C₂H_2n+2

C₂H_2n-2

C_nH_2n+1

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Eye inflammation is caused by the deficiency of vitamin.

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Vitamin D

Vitamin C

Vitamin B

Vitamin A

Which of the following is a secondary pollutant.

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CO₂

CO

SO₃

HF

Some organic compound are soluble in water due to the presence of .

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-OH

H⁺

Botha a and b

Covalent bond

Temporary hardness is due to the presence of bicarbonates of.

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Calcium

Magnsium

Both of them

None of them

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