Question # 1

Dehydration means removal of.

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Water

Halogen

Hydrogen

All above.

Amont the followign substitution reaction is characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

Ethen is prepared by heating a mixture of ethanol and excess of concentrated sulphuric acid at:

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150°C

180°C

250°C - 300°C

400°C - 450°C

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

Which of one of the following is used as as fumigant:

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Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

Which one of the following is polmerized to from benzene?

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ethane

ethene

methane

ethyne

The end product of oxidation of acetylene is.

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Propen glycol

Ethan glycol

Glyoxal

Oxalic acid

Traces of acetylene are present to coal gas about.

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0.06 %

0.08%

1.1 %

90%

The alkanes consisting of C₅ to C₁₀

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gases

liquids

solid

plasma

The order of reactivity of hydrogen halides with alkenes is.

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HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

Dehydrohalogenation take place in the presence of.

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Aqueous NaOH

Alcoholic KOH

Aqueous KOH

Alcoholic NaOH

The reduction of alkyl halides takes place in the presence of.

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Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

If an organic compound 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 hav 8 hydrogen atoms

Its name will be n-butane.

It will be least reactive.

Alkanes do not react in

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Diffused sunlight

Dark

Bright sunlight

None of these

Oxidation of alkenes produce.

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Glyoxal

Glycol

Oxalic acid

Formic acid

Dehydrohalogenation takes place in the presence of .

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NaOH aqueous

Alcoholic KOH

Aqeous KOH

Alcoholic NaOH

Which of following dehydration of alcohols take place:

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NaOH

KOH

H₂SO₄

HCl

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