Question # 1

Down's cell is used to prepare.

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Sodium carbonate

Sodium bicarbonate

sodium metal

Sodium hydroxide

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

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic subtitution

What are the total numbers of periods in the modern periodic table.

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3

5

7

8

An atom or group of atoms, which confers characteristic properties to organic compounds, are called.

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Isomerism

Metamerism

Ligands

Functional groups

Which one of the following has highest melting and boiling points.

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HF

HBr

HCl

HI

Amongst the following, the compound that can be most readily sulphonated is

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toluene

benzene

nitrobenzene

chlorobenzene

Aluminium does not corrode because.

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It is a semi metal

It is a silver shining metal

It does not react with O2

It forms a protective layer of Al2O3

On heating aldehydes with Fehling's solution we get a precipitate whose colour is

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Pink

Black

Yellow

Brick red

Glycoside linkage is present in

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Proteins

Nylon -6,6

Starch

DNA

The IUPAC name of CH3OCH6H5 is

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Methyl phenyl ether

Methaoxy benzene

Phenoxy methane

methoxy phenyl

Benzene can not undergo.

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Substitution reactions

Addition reactions

Oxidation reactions

Elimination reactions

Aluminum oxide is

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acidic oxide

basic oxide

amphoteric oxide

none of these

Which one of the following group of Periodic table called chalcogen family.

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Group III A

Group VA

Group VI A

Group VII A

Grignard's reagent is reactive due to

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the presence of halogen atom

the presence of Mg atom

the polarity of C-Mg bond

none of the above

Which one of the following elements has the same oxidation number in all its known compounds.

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Beryllium

Nitrogen

Sulphur

Chorine

The percentage of clay and liem stone in cement is in the ratio of.

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1 : 1

1 :2

1:3

3:1

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

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