Question # 1

The oxidation of NO in air produces

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N₂O₃

NO₂

N₂O₃

N₂O₄

Which one of the following species is not an electrophile.

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HN3

Br

H+

BF3

Typical transition element is

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Sc

CO

Ra

Y

Group VI B of transition elements contains.

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Zn, Cd, Hg

Fe, Ru,Os

Cr, Mo, W

Mn, Te, Re

Absolute alcohol can be obtained from rectified spirit by

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By adding sodium metal

By extraction

By predistillation in the presence of CaO

Not possible because of azeotropic mixture

Which is the longest periodic table

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4

5

6

7

Ketones are prepared by the oxidation of.

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

When ethyl alcohol is heated with conc. H2SO4 it produces ethene. The temperature required is as proximately

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100 ^oC

78 ^oC

Above 200 ^oC

140- 170 ^oC

Which form interstitial compounds.

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Fe

Ni

CO

All of those

Which sugar is called milk sugar

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Glucose

Fructose

Lactose

Maltose

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

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Hund's rule

Markownikov's rule

Pauli's Exclusion Principle

Aufbau Principle

Which one of the following compounds will form red precipitate with ammoniacal cuprous chloride

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Acetylene

Ethylene

Benzene

Methane

Which substance is used for silvering of mirror.

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Acetaldehyde

Ethanol

Ethylene glycol

Acetone

All of the followings react with Fehling solution except

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CH2CH2CHO

CH3-CH2COCH3

HCHO

CH3-CHO

Which one is not an argillaceous material.

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Clay

Shale

State

Gypsum

The conversion of ethanol to ethene is an example of.

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Dehydration

Hydration

Hydrogenation

Fermentation

Which is a secondary pollutant

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Carbonic acid

CO₂

SO₂

CO

Which is most difficult to be oxidized

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CH₃CHO

CH₃COCH₃

HCHO

C₂H₅CHO

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