Question # 1

Why does a mixure of zinc and hydrochloric acid acts as a reducing agent.

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Because zin acts as a reducing agen

Because molecular hydrogen is produced

Becuse atomic hydrogen is produced

Becuse chloride ions are produced with zn HCl which act as a reducing agent

The most essential element for organic compound is.

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Nitrogen

Oxygen

Hydrogen

Carbon

Alkanes are least reactive compounds beacuse they are.

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Unsaturated hydrocarbons

Saturated hydrocarbons

Both a and b

None of these

If an organic compund has 4 carbon atoms . All singly bonded. It will have the following characteristics except one.

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It will be saturated hydrocarbon

It will be least reactive

It name will be n-butane

It will have 8 hydrogen atoms

The valancey of carbon is

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1

2

3

4

Alkynes are produced in large amounts by cracking of

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Xylol

Petroleum

Natural gas

Benzene

Which hydrocabon is responsible for exlosions in coal mines.

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Methane

Butane

Pentane

Ethene

Which of the following is not a process of halogenation of alkanes.

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Chlorination

Iodination

Cracking

Bromination

How many mols of oxygen will be reuired to completely burn propane.

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4 moles

3 moles

5 moles

6 moles

Which of the following is considered a parent organic compound.

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Alkenes

Alkanes

Alkynes

Aromatics

Which carbon compunds are not considered organic compound

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Carbonates

Cyanides

Carbides

All of these

If naphtha undergoesa combustion reactin what products do yu expect to form

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Alkanes

Alkenes

CO2 and H2O

Both alkanes and alkenes

Alkanes give eaction only

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Addition

Decomposition

Displacement

Substitution

Th breakdown of naphtha produce

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Alkane

Alkenes

Both a and b

Aromatic

What percent of natural gas consists of methane

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81%

84%

85%

83%

The catalyst used for cracking of naphtha is

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Common salt

Ni

Washing soda

Zeolite

The branch of chemistry which deals with the study of hydrocarbons and their drivatives is known as

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Inorganic chemistry

Nuclear chemsistry

Organic chemistry

Biochemistry

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