Question # 1

The lives of aquatic plants and animals are indirectly related to concentration of dissolved gas in water.

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Nitrogen

Hydrogen

Oxygen

Carbon

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

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

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

If Qc = Kc the reaction goes in:

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Forward

Reverse

At equilibrium state

None

The strong heating of coal in the absence of air is called.

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Carbonization

Destructive distillation

Fractional distillation

All

Traces of acetylene are present in coal gas about.

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0.06 %

0.08%

1.1%

90%

The pH of acid rain.

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2

3

4

5

Vitamin B₁ (Thiamin) was discovered by.

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Hopkins

Funk

J.Watson

Davy

Open chain compounds are also called:

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aliphatic compounds

alicyclic compounds

aromatic compounds

hydrocarbons

Water dissolves Non-ionic compounds by:

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Ion-Ion forces

Dipole forces

Dipole - Dipole forces

Hydrogen Bonding

Major portion of ozone layer is foun in.

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Grease stains from clothes are removed by sing.

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Ammonium nitrate

Aluminium hydroxide

Ammonium hydroxide

Aluminum chloride

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