Question # 1

Methanol is prepared from CO and H_{2 using catalyst:}

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ZnO

Cr₂O₃

Pt

Ni

The iron obtained from blast furnace is

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Pig iron

Wrought ion

Soft ion

Steel

In public urinals, we observe some nascent smell. This smell is due to

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Hydrolysis of urea of urine by urease of atmosphere into NH₃and CO₂

Formation of sulphonic acid by urea of urine

Reaction of CO₂of atmosphere with urea monoitrate in urine

Hydrogen present in air reacts with nitrogen forming NH₃

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

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Acetic acid

Acetaldehyde

Formaldehyde

Formic acid

How many molecules of chlorine adds in benzene in the presence of sunlight

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One

Two

Three

Four

Angle 120° is observed in molecules :

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CH₄

CH_3-CH₃

CH -CH

CH_{2 =}CH₂

[Zn(NH₃)₄]³⁺possess geometry

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Square plannar

Hexagonal

Tetrahedral

None of these

Among the following polymers, the strongest molecular forces are present in

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Elastomers

Fibres

Thermoplactics

Thermosetting polymers

All 3d series elements show variable oxidation states. The one shown by all 3d elements is

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+2

+3

+4

+5

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with

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Hund's rule

Markownikov's rule

Pauli's Exclusion principle

Auf ban principle

Which carbon is more electronegative?

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sp³- hybridized carbon

sp-hybridized carbon

sp²-hybridized carbon

always same irrespective of its hybrid state

Which one of the following substances is a synthetic polyester

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Cotton

Nylon

Rayon

Terylene

Which salt is used for preserving food

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CaCl₂

NaCl

Na₂SO₄

BaCl₂

The substance upon which an enzyme acts is known as its

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Domain

Field

Substrate

Reactant

Grignard's reagent on treatment with dry CO₂and HCI yields

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Ester

Alcohol

Carboxylic acid

Aldehyde

Alcohol can be denaturated by adding:

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Acetone

Methanol

Pyridine

All

Which is not a fossil fuel

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Petroleum

Coal

Natural gas

None of them

UV radiations bring about

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Skin cancer

Mouth cancer

Lung cancer

Liver cancer

When elements of group I react with the elements of group VIA theory form

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Ionic bond

Covalent bond

Polar bond

None

Which of the following has magnesium?

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Carbonic anhydrase

Haemocyanin

chlorophyll

Vitamin B₁₂

Sintered glass is porous material used for:

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Absorption

Decoration

Filtration

All of above

Monosaccharides are

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Aldoses

Ketoses

Either a and b

None of these

The limiting line of Blamer series in hydrogen spectrum lies in

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Visible regions

Ultraviolet region

Infrared region

x-rays region

Which of the following compound is industrially prepared by the electrolysis of solution of NaCl

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Na₂CO₃

NaHCO3

NaOH

NaOCl

Which of the following is not an example of addition polymer?

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Polyethene

Polystyrene

Neoprene

Terylene

Which compound will not dissolve in H₂O

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C₆H₆

C₂H₅OH

CH₃CH₂CH₂OH

CH₃- OH

Reductive ozonolysis of benzene produces

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Acetone

Maleic anhydride

Phthalic acid

Glyoxal

Ozone in most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Ethyl acetate is obtained when methyl magnesium iodide reacts with

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Ethyl formate

Ethyl choroformate

Acetyl chloride

carbondioxide

Caroxyl group has functional in it.

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one

two

three

four

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