Question # 1

In the troposphere (lowest layer), the temperature decreases form 17°C to;

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-58°C

-93°C

-61°C

-49°C

Which one contains double covalent bound?

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Pentane

Ethylene

Acetylene

All

Sodium carbonate is manufactured by.

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Haber's process

Ostwald's process

Solvay's process

All

The pH of water containing CO₂ is

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4-6

5.6-6

6-7

7-8

Raw materials used in Solvay's process.

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Brine

Lime stone

Ammonia gas

All

When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of:

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Cu2S + Cu2O

Cu2O +FeS

Cu2S + FeS

FeO + SO2 + Cu2S

Main component of natural gas is

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Methane

propane

Butane

Propene

Dehydrohalogenation take place in the presence of.

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Aqueous NaOH

Alcoholic KOH

Aqueous KOH

Alcoholic NaOH

Which contains sufficient amount of metal?

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Mineral

Ores

Rocks

Soil

Rapid growth of algae in water bodies in because of detergent having.

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Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

Law of Mass Action was put forward by:

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G.N.Lewis

Lowry

Arrhenius

Gulbderg and Waage

Tetra saccharides are classified under.

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Monosaccharides.

Oligosaccharides

Polysaccharides

All of them

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

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