Question # 1

Substitution reaction is the characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

when a system is in equilibrium state or in dynamic equilibrium state.

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Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

Which gas is evolved when acids react with carbonates and bicarbonates?

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Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

Functional group of Alcohols is

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-COOH

-C=0

C-O-C

-OH

The number of carbon atoms present in petroleum ether.

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1-5

2-5

3-7

5-7

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

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-58°C

-93°C

-61°C

-49°C

A salt is not composed of

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A metallic cation

Non -metallic anion

an anion of a base

An anion of an acid

Methyl butanoate smell like.

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Apple

Mange

Lemon

Grapes

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

Bronsted and Lowry presented their theories of acids and bases in

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1785

1787

1923

1925

The molecular formula of the first three members of the alkane hydrocarbons are CH_4,C₂H₆ and C₃H₈. What is the molecular formula for the eight alkane member, octane, which is found is petrol?

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C₈H₈

C₈H₁₆

C₈H₁₈

C₈H₂₀

Global warming causes rising of the sea level. The cause of global warming is.

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

75% atmosphere mass lies in how many kilometers.

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11 km

30 km

50 km

85 km

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