Question # 1

Higher concentration of CO causes.

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Fatique

Headache

Both of them

None of them

Carbon monoxide is harmful to us because.

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It paralyses the lungs.

It damages lungs tissues.

It reduces oxygen carrying ability of haemoglobin

It makes the blood coagulate.

When HCl and KOH is reacted the salt formed is.

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Acidic

Basic

Normal

Complex

The reaction in which the products can recombine to form reactants are called.

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Reversible reaction

Irreversible reaction

Decomposition

Addition

Forest fires and burning of wood emit.

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CO₂

NO₂

SO₂

Cl₂

Ozone is beneficial for us as it

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Absorb infrared radiation.

Absorb Ultraviolet radiations.

Absorb Chlorofluorocarbons

Absorb Air pollulant

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

General formula of alkyl radical is

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C_nH_2n+2

C_nH_2n-2

C_nH_2n+1

C_nH_2n

The number of carbon atoms present in diesel oil.

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10-15

11-15

12-15

13-15

According to Bronsted and Lowry concept an acid is a substance that can donate.

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Proton

Electron pair

Neutron

Electron

Swimming pools are cleaned by the process.

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Chlorination

Hydrogenations

Saponification

None of them

75% atmosphere mass lies in how many kilometers.

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11 km

30 km

50 km

85 km

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

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