Question # 1

The product of any Lewis acid-base reaction is a single specie called:

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free radical

adduct

molecular ion

conjugate

The recombination of O and O₂ in mid stratosphere is an

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Exothermic reaction

Endothermic reaction

Heat absorbing process

None of these

Which gas saves the surface of earth from ultra violet radiation?

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CO₂

CO

N₂

O₃

Which is the major effect of global warming?

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Increase in temperature.

Rise in sea level

Melting of glaciers

All of them

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

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Joundice

Cholera

Dysentery

Typhoid

Petroleum is refined by:

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destructive distillation

fractional distillation

simple distillation

dry distillation

Which one is used for alkaline batteries?

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NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Fertilizers are used to make up the deficiency of;

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oxygen and carbon

iron and magnesium

nitrogen and phosphorus

hydrogen and calcium

These are safe source of food and energy for body during emergency.

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Proteins

Vitamins

Carbohydrats

Lipids

When a reaction ceases to proceed further , it is called.

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Chemical states

Static state

Physical state

Dynamic equilibrium state

Pitch is black residue of.

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Coke

Coal tar

Coal

Coal gas

When the number of moles of both sides are equal in a reaction then the unit of Kc will be:

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no unit

mol-2 dm6

mol dm3

mo-2 dn

Mg²⁺ and Ca²⁺ ions react with soap to form calcium and magnesium salts of fatty acids called.

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Gelatin

Scum

Paste

None of them

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