Question # 1

Molecular formula of butyne is .

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C₄H₆

C₃H₄

C₄H₇

C₄H₈

Normal rain water is:

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weakly acidic

strongly acidic

weakly basic

strongly basic

Arrhenius presented his concept about acids and bases in.

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1785

1787

1923

1930

Which one of the following salts makes the water permanently hard?

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

Soda time is a mixture of:

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CaO and NaOH

CaCI2 and NaOH

CaO and ca(OH)2

CaCI2 and KOH

Which one of the following is not a greenhouse Effect?

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Increasing atmosphere temperature.

Increasing food chains

increasing flood risks

Increasing sea-level

Specific Heat capacity of water is about.

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4.0 Jg^-1 K^-1

4.1 Jg^-1K^-1

4.2 Jg^-1K^-1

4.3 Jg^-1K^-1

Temporary hardness can be removed by__________.

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Quick lime

Slaked lime

Lime stone

HCl

Which one is triglyceride.

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carbohydrates

Proteins

Lipids

Vitamins

Lactose and maltose are;

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monosaccharides

disaccharides

trisaccharides

tetrasaccharides

Swimming pools are cleaned by a process:

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Hydrogenation

Bromination

Chlorination

Nitration

When crude oil is heated in the fractionating tower:

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Vapour of higher boiling point fraction condense first in the lower part of the tower.

Vapours of lower boiling point fraction condense first in the lower part of tower.

Vapour of higher boiling point condense lather in the upper part of tower.

Vapours of higher boiling point never condense.

_______ is the king of chemicals.

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Hydrochloric acid

Nitric Acid

Sulphuric acid

Phosphoric acid

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