Question # 1

Which one of the following diseases severe diarrhea and can be fatal?

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Joundice

Cholera

Dysentery

Typhoid

How many atmospheric temperature increase every year due to accumulation of CO₂ in air.

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0.03 ^oC

0.05 ^oC

1^oC

2^oC

Which acid used for food preservation?

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H₂SO₄

HNO₃

HCl

CH₃COOH

The nitrogen present in urea is used by plants to synthesize.

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Sugar

Proteins

Fats

DNA

In shoe polished, which chemical is used.

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Ethanol

Methanol

Carbon black

Formaldehyde

PAN stands for

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Poly aniline nitrate

Proxy acetyl nitrate

Poly acetyl nitrite

Proxy acetyl nitrite

Permanent hardness is removed by adding.

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Na₂ zeolite.

Soda lime

Lime water

Quick lime

Ozone is beneficial for us as it

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Absorb infrared radiation.

Absorb Ultraviolet radiations.

Absorb Chlorofluorocarbons

Absorb Air pollulant

Chemical form of gypsum.

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MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

Temporary hardness in water can he removed by.

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Boiling Method

Using washing soda

Using sodium zeolite

All of them

The pH of acid rain.

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2

3

4

5

In laboratory urea was prepared by

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Wohler

Rutherford

Berzelius

Dalton

The body reactions are catalized by.

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Amino acids

Lipids

Enzymes

Fatty acids

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