Question # 1

Fluorine is in group VII A of periodic table. Its chemistry will most closely resembles that of.

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Argon

Boron

Iodine

Sulphur

A cyanohydrin is formed by the reaction of

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Alcohol and HCN

Ketone and NH3

Aldehyde and NH2OH

Aldehyde and HCN

Secondary alkyl halides are those in which halogen atom is attached with a carbon atom which is further attached to.

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One beta carbon

Two beta carbon

Three beta carbon

Four beta carbon

Mono saccharides contain carbon atoms.

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3 to 6

3 to 7

3 to 9

only six

Which substances is called chrome yellow.

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Pb3O4

PbO

2PbCO3.Pb(OH)2

PbCrO4

S_N2 mechanism involves

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1st order kinetics

2nd order kinetics

3rd kinetics

zero order kinetics

Refrigeration capacity of liquid neon is greater than liquid helium by

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80 times

50 times

40 times

10 times

The number of possible isomers of xylene are

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2

3

4

5

Which element burns in nitrogen atmosphere to form nitride.

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Mg

Al

Both a and b

None of these

The flavor of octylacetate is

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Orange

Apricot

Banana

Jasmine

All of the following tests are used to identify aldehydes except.

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Tollen's test

Fehling test

Baeyer's test

Benedict test

NO2 can be obtained by heating.

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NaNO3

KNO3

Pb(NO3)2

NH3NO3

Which is not used of Borax

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Softening of water

As medicine for washing eyes

As flux in metallurgical operations

To make quartz

Which one of the following products is not formed when acetic acid reacts with PCl5

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C2H5Cl

HCl

POCl3

CH3COCl

Water is disinfected by a substance to avoid toxification

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KMnO₄

Alums

O₃

Cl₂

Which type of coal has greater percentage of carbon.

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Peat

Lignite

Bituminous

Anthracite

In which compound, oxidation state of sulphur is +6

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H2S

H2SO4

H2SO3

SO3

The most electronegative element of group V-A is

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N

P

Sb

Bi

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