Question # 1

Which elements are deposited at the cathode during the electrolysis of brine in diaphragm cell

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H₂

Ba

Ra

Rn

The main pollutant of leather tanneries in the waste water is due to

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Lead

Chromium VI

Copper

Chromium III

Which of the following sulphates is not soluble in water.

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

Who gave the law of Triads in 1829?

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Dobereiner

Mosely

Newland

Mendeleev

Which one of the following elements has the largest second ionization energy.

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O

Na

F

Ne

Which one of the following is not a heterocyclic compound.

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Furan

Thiophene

Pyridine

Aniline

Elimination biomolecular reactions involve.

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First order kinetics

Second order kinetics

third order kinetics

Zero order kinetics

Hydrolysis of benzene sulphonic acid with superheated steam or by boiling with dil HCl gives.

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Toluene

Benzene

Xylene

Chlorobenzene

Which one of the following noble gases is least polarizable

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He

Ne

Ar

Kr

How much fresh water is used for domestic purpose

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8%

23%

69%

100%

Stainless steel is

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Compound

An element

Mixture

100% pure iron

Which one of the following is not steroid

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Cholesterol

Ergosterod

Female sex Harmons

Globulin

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

Arsenic impurities in contact process are removed.

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By prolong heating the gases

By treatment with Fe(OH)3

In scrubbing tower

In absorption tower

The brown gas formed when metal reduces HNO3 is

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N2O5

N2O3

NO2

NO

Malonic acid is

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Aromatic monocarboxylic acid

Aromatic dicarboxylic acid

Aliphatic monocarboxylic acid

Aliphatic di carboxylic acid

------------- metal is used in the Thermite process because of its reactivity

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Tron

Copper

Aluminium

Zinc

Cyclic structure of benzene was proposed by

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Dewar

Faraday

Down

Kekule

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