Question # 1

Boiling point range of petroleum ether.

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5- 20 ^oC

10- 30^oC

20- 60^oC

30- 90^oC

Which one is not use of lime

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Extraction of metals

Ceramic industry

Preparation of bleaching powder

Preparation of gypsum

When methane reacts with Cl2 is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Photochemical smog mainly consist of

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Higher hydrocarbons

Oxidising agnts

Reducing agent

All of these

The conversion of benzene to chlorobenzene is a

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Addition reaction

Elimination reaction

Substitution reaction

Dehydration process

The oxides of metal sare generally

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Acidic

Basic

Neutral

Amphoteric

Which of the following hydrogen halide is the weakest acid in solution

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HF

HBr

HI

HCl

Which one of the following pairs of metal reactive directly with nitrogen

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Na and Mg

Li and Mg

Mg and Ca

Li and Be

Which substance reacts with sodium nitroprusside.

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Ethanol

Acetaldehyde

Dimethyl ketone

Methanol

Essential amino acids are those which

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Are present in every protein

Must be supplied to body through diet

Contain two carbocyclic acid and one amino group

Is syntherised by our body

Sodium is collected over molten sodium chloride in Down's cell, because.

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It does not react with NaCl

It is lighter in weight and floats on molten NaCl

Its reactivity is greater than NaCl

None of these

Which on eof the following alkaline earth metal form peroxide when heated with oxygen at 600 ^oC

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Magnesium

Calcium

Strontium

Barium

NH4NO3 on heating at 200 ^oC changes to

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N2O

NO

NO2

N2O4

Which one of the following gases is prepared by heating a mixture of sodium acetate and sodium hydrozide.

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CH4

CH2-CH3

CO2

CO

When ethyl alcohol is heated, with NH3 in presence of ThO2 then

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O-H bond is broken

C-O bond is broken

Ethene is formed

Ethane is formed

When ethyl bromide is heated with Ag2O the product formed is.

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Ethanol

Ethene

Ethanol

Di ethyl ether

Which oxide is amphoteric in nature.

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BeO

MgO

CaO

BaO

Which one of the following is not steroid

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Cholesterol

Ergosterod

Female sex Harmons

Globulin

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