Question # 1

Which one of the following disease causes severe diarrhea and can be fatal:

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Jaundic

Dysentery

Cholera

Typhoid

Salt makes the water permanently hard.

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CaSO₄

Ca(HCO₃)₂

NaHCO₃

NaCO₃

Carbon monoxide is harmful to use because it:

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Paralyses lungs

Damages lungs

Reduce oxygen carrying ability of hemoglobin

Make the blood coagulate

Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of

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Sodium metal

Zinc metal

Magnesium metal

Potassium metal

Which of the following is a poisonous gas.

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Oxygen

Ozone

Nitrogen

Carbon dioxide

_______ is the king of chemicals.

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Hydrochloric acid

Nitric Acid

Sulphuric acid

Phosphoric acid

The green house effect is proportional to the amount of which gas in air.

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CO₂

O₂

N₂

All of them

The functional group -COOH is found in.

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Aldehydes

Esters

Carboxylic acids

alcohols

Photosynthesis process produces.

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Starch

Cellulose

Sucrose

Glucose

Which one is homocyclic compound?

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Benzene

Cyclobutane

Cyclohexane

All

conjugate base of HCl is:

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HCl^-

CH

Cl

NH₃

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

The strong heating of coal in the absence of air called.

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Fractional Distilation

Destructive Distiation

Carbonization

Catenation

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