Question # 1

Which one of the following will be required to form ethene from ethyl chloride.

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Alcoholic KOH

Aqueous KOH

Alkaline KMnO4

Bromine

During the manufacturing process of cement the temperature of the decomposition zone goes up to

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600°C

800°C

1000°C

1200°C

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

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Acetaldehyde

Acetone

Butanone

3-Pentanone

Iodine deficiency in diet is known to cause.

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Beri Beri

Goiter

Rickets

Night blindness

Which of the following species is ortho and para director.

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CHO

SO3H

NO2

Cl

Which noble gas is used in radiotherapy

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Neon

Argon

Krypta

Radon

Which of the following elements is not present abundantly in earth's crust

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Silicon

Aluminium

Sodium

Oxygen

Which one of the following metal cannot evolve hydrogen from acetic acid.

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Sodium

Potassium

Magnesium

Zinc

In group VA elements the most electronegative elements is.

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Sb

N

P

As

Venyl acetylene combines with HCl in

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Polyacetylene

Benzene

Chloroprene

divinyl acetylene

An ester can be prepared by the reaction of.

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Two alcohols

Alcohol and an aldehyde

An alcohol and an organic acid

an acid and a ketone

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

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Argon

Boron

Iodine

Sulphur

A polymeric substance that is formed in the liquid state and then hardened to a right solid is called a

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Fiber

Plastic

Varnish

Polyamid resin

The bond angle between any two SP²Hydridized orbitals is of

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180°

109.5°

120°

107.5°

The basis of modern periodic table is

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Electron affinity

Atomic mass

Ionization Potential

Atomic number

Which three elements are needed for the healthy growth of plants

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N,S,P

N,Ca,P

N,P,K

N,K,C

Zwitter ion is

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Dipolar ion

Amino acid with two amino groups

Amino acid with two carboxylic acid group

A synthetic amino acid

Chemical formula of stibnite on.

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BaSO4

Sb2S3

FeS2

ZnS

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