Question # 1

Which of the following gas is used to destroy harmful bacteria in water.

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Iodine

Chlorine

fluorine

Bromine

Which of the following is reducing sugar.

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Glucose

Fructose

Sucrose

Starch

The general formula of carbohydrate is:

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C2n(H2O)

CN(H2O)n

Cn(H2O)2n

C2n(H2O)n

Which one of the following is not the characteristics of monosaccharide?

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White crystalline solids

Soluble in water

Hydrolysable

Reducing is nature

Jabir Bin Haiyan prepared.

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Nitric Acid

Hydrochloric acid

Sulphueric Acid

All of these

the removal of which ion causes water softening.

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Na⁺

Mg²

Li⁺

K⁺

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Which element do not causes toxicity in water?

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Lead

Arsenic

Sodium

Mercury

Protein is not found in:

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Muscles

Skin

Cotton

Hair

Molecular formula of butyne is .

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C₄H₆

C₃H₄

C₄H₇

C₄H₈

An equilibrium is achievable only in a:

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big system

small system

open system

closed system

If a liquid has a pH of 7 then it must.

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Be a colourless and odourless liquid

Freeze at 0 ^oC and boil at 100 ^oC

Be natural

Be a solution containing water

Which one of the following is polmerized to from benzene?

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ethane

ethene

methane

ethyne

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