Question # 1

Ethyne on oxidation with strong alkaline KMnO4 changes to

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Ethyl alcohol

Acetaldehyde

Vinyl alcohol

Glyoxal

Ethanol on dehydration can be changed to

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Ethene

Diethyl ether

Both 'a' and 'b'

None of these

In unimolecular reactions, the reaction completes in

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_{One step}

Two steps

Three steps

None of these

Galvanized iron is protected by a thin layer of

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Cr

Zn

Sn

Pb

The oligosaccharides contain number of hexose unit.

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2 to 7

2 to 8

2 to 9

2 to 100

In which country first of all paper was invented

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USA

China

Egypt

Germany

The anhydride of HCIO₄is

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CIO₃

CIO₂

Cl₂O₅

Cl₂O₇

Which one of the following elements commonly exhibits oxidation states of +6 and +3 in aqueous solution.

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Na

Cr

Mg

C

Which of the following compounds will not give iodoform test on treatment with I2/NaOH

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Acetaldehyde

Acetone

Butanone

3-Pentaneone

SN₂reactions can be best carried out with

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primary alkyl halides

secondary alkyl halides

tertiary alkyl halides

All the three

Bakelite is obtained from phenol by reacting with

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Acetal

Ethanal

Formaldehyde

Methanol

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

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Toluene

Benzene

Nitro-benzene

Chloro-benzene

In IUPAC system, the name of K4[Fe(CN)6] is

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Potassium ferricynaide

Potassium ferrocynide

Potassium Hexacyanoferrate (II)

Poatssium hexacaynoferrate (III)

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects

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eyes

ears

stomach

nose

Which substances is called chrome yellow.

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Pb3O4

PbO

2PbCO3.Pb(OH)2

PbCrO4

Primary, Secondary and tertiary alcohols can be distinguish by.

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Iodoform test

Lucas test

Fehling solution

Ammoniacal silver nitrates

Aromatic compounds burns with sooty flame because.

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They have high percentage of hydrogen

The have a right structure

The have high percentage of carbon

The resist reaction with air

Which one of the following elements burns in air to form an oxide which, when shaken with water, give a solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

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