Question # 1

Out of the elements of group VIA the highest melting and boiling points is shown by the element.

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Te

Se

S

Po

Which is the strongest acid

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HCIO

HCIO₂

HCIO₃

HCIO₄

Which one of the following compounds is a heterocyclic.

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Anthracene

Phenol

Pyridine

Aniline

Acetone reacts with HCN to form cyanohydrin it is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic subtitution

Which compound is called universal solvent

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CH₃OH

C₂H₅OH

CH₃O CH₃

H₂O

How much fresh water is used for domestic purpose

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8%

23%

69%

100%

The percentage of carbon is different types of iron products is in the order of.

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Cast iron > wrought iron > Steel

Wrought iron >Steel >Cast iron

Cast iron > Steel > Wrought iron

The presence of a double bond in a compound is the sign of.

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Saturation

Unsaturation

Substitution

None of these

Which element form an ion with charge +3

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Beryllium

Aluminum

Carbon

Sillicon

Which one of the followings is not a pollutant.

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CO2

NO2

CO

SO2

Which one is symmetrical ketone

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Acetone

Methyl ethyl ketone

Methyl n propyl ketone

2- pentonone

In which layer of atmosphere, ozone is present.

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Thermosphere

Mesosphere

Stratosphere

Troposphere

Aluminum reacts with nitrogen to form

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AIN

Al₂N

Al₂N₃

Al₄N₆

Banana flavour is given by the ester

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Octyl acetate

Amyl butyrate

Amyl acetate

Ethyl butyrate

Nylon 6,6 is obtained by the reaction of hexamethylene diamine with

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Acetic acid

Adipic acid

Viny chloride

Acetyl chloride

The word paper is derived from the name of which reed plant.

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Rose

Sun flower

Papyrus

Water Hyacinth

Which one of halogens is a liquid

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F₂

Cl₂

Br₂

I₂

Which of the following is not directly prepared from CH₃COOH

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Ethyl acetate

Acetyl chloride

Acetic anhydride

Acetamide

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