Question # 1

The general formula of carbohydrate is:

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C2n(H2O)

CN(H2O)n

Cn(H2O)2n

C2n(H2O)n

Carbohydrates are synthesized by plants through.

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Respiration

Photosynthesis

Dehydrateion

Evaporation

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

Chemical form of gypsum.

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MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

The substances formed during the chemical reaction are called.

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Product

Reactants

Radicals

Element

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

The % age of carbon is bituminous is

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60

70

80

90

Which one of these protects us against the disease;

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Carbohydrates

Lipids

Proteins

all of these

Molecular formula of butane is

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C₄H₈

C₄H₁₀

C₄H₁₂

C₄H₆

Ethyne is oxidized by alkaline KMnO₄ then ....... hydroxyl group add to the triple bond.

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Two

Three

Four

Five

pH of acid rain is:

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7-5

6-7

1-2

4-5

Which gas protects the Earth's surface from ultraviolet radiations?

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CO₂

CO

N₂

O₃

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

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-OH

H⁺

Botha a and b

Covalent bond

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