Question # 1

The process used to improve quality of gasoline

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Thermal Cracking

Reforming

Combination

Steam Cracking

Which of the following gives acidic oxide

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N

As

Sb

Bi

Correct order according to atomic size in the following is

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Na > K

Be > Mg

O > N

Cl > F

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

Which nitrogen fertilizer make the soil acdic.

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Calcium nitrate

sodium nitrate

Potassium nitrate

Ammonium nitrate

Ozone depletion in stratosphere region is mainly due to the reaction of O3 with

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O2

SO2

CFCs

All of these

Methyl alcohol can be distinguished from ethyl alcohol by

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Action of Cl2

Action of NH3

Dissolving in H2O

NaOH +I2

The process in when alkene are converted into carboxylic acid is known as

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Oxidation

Reduction

Hydrolysis

Hydration

Bleaching powder contains available chlorine approximately

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100%

70-80%

35-40%

10-20%

Which one is primary pollutant.

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Peroxyacetyl nitrate

Sulphuric acid

Carbonic acid

Carbon monoxide

Iodine deficiency in diet is known to cause.

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Beri Beri

Goiter

Rickets

Night blindness

When methane reacts with Cl₂in the presence of diffused light the products obtained are

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Chloroform only

Carbon tetrachloride only

Chloromethane and dichloromethane

Mixture of a, b, c

Tincal is a mineral of

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Al

C

Si

B

Which of the following is a non typical transition element.

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Cr

Mn

Zn

Fe

Isopropyl alcohol on oxidation gives

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Acetaldehyde

Acetone

Ether

Propene

The electrophile in Aromatic sulphonation is

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H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Group VI B to transition elements contains

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Zn, Cd, Hg

Fe, Ru, OS

Cr, MO, W

Mn, Te, Re

Corundum is

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Al2O3

Na2AlF6

Quartz

Calcium

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