Question # 1

Litharge is chemically

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PbO

PbO2

Pb3O4

Pb(CH3COO)2

Wohler synthesized first organic compound in laboratory from

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Heating cyanogen's

Cyanogen and ammonium chloride solution

Cyanogen and HNO2

Heating ammonium cyanate

Which one is the heterocyclic compound of oxygen

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Pyrridine

Parrole

Furan

Thiophene

Which one is alcohol in the following

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CH₃.CH₂.OH

CH₃.O.CH₃

CH₃COOH

CH₃.CH₂.Br

Preparation of vegetable ghee involves

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Halogenation

Hydrogenation

Hydroxylation

Dehydrogenation

___________ is use as a cooling medium for nuclear reactors

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Ne

He

Ar

Kr

Acetaldehyde reacts usually with

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Electrophiles only

Nucleophiles only

Electrophiles and nucleophiles

Free radicals only

Cyanogen chloride reacts with ethyl magnesium bromide to give

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CH₃CH₂Cl

CH₃CH₂Br

C₄H₁₀⁺

CH₃CH₂CN

The carbon atom of carbonyl group is hybridized

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Sp

Sp²

Sp³

dsp²

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

Which one of the following compounds undergoes Cannizzaro's Reaction.

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Acetaldehyde

Benzaldehyde

Acetone

Propionaldehyde

Which enzyme is not involved in fermentation of starch.

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Diastase

Zymase

Urease

Invertase

Starch is

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Monosaccharide

Disaccharide

Polysaccharide

Oligosaccharide

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects

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eyes

ears

stomach

nose

In group V-A elements the most electronegative elements is

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Sb

N

P

As

Which raw material is used for preparation of bleaching powder.

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Cl2 and H2O

Cl2 and Lime

Cl2 and HOCl

HCl and Lime

Who gave the law of Triads in 1829?

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Dobereiner

Mosely

Newland

Mendeleev

Common names of aldehydes are derived from the common names of.

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Alcohol

Ketones

Carboxylic acids

Alkenes

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