Question # 1

Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

a bleaching agent

A dehydration agent.

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

White lead is

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Basic lead acetate

Acidic lead carbonate

Basic lead carbonate

Basic lead hydroxide

In the manufacture of iron from haematite, limestone is added to act as.

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Flux

A reducing agent

Slag

An oxidizing agent

BiCl₃on hydrolysis forms a white precipitate of

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Bismuthio acid

Bismuth oxychloride

Bismuth pentachloride

Bismuth hydroxide.

Hypo is used to photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Setting of Plaster of Paris involves

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Oxidation with atmospheric

Combination with atmospheric CO₂

Dehydration

Hydration to yield another hydrate

Wholer prepared urea from

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Ammonia

NH₄CNO

NH₃

Uric acid

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

The rotation of two carbon atoms joined by double bond would happened only if

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P_ibond is broken

Sigma bond is broken

Both bonds are broken

None of above

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remain constant

Decreses for low value of Z and increases for higher value of Z.

Covalent compounds are soluble in

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Polar solvents

Non-polar solvents

Concentrated acids

All solvents

Formic acid is obtained when

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Calcium acetate is heated with conc. H₂SO₄

Calcium formate is heated with calcium acetate

Glycerol is heated with oxalic acid

Acetaldehyde is oxidized with K2Cr₂O₇ and H₂SO₄

The relative rates of diffusion of a gas (molecular weight = 128) as compared to oxygen is

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2 times

1/4

1/8

1/2

Aldehydes are produce in atmosphere by

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Oxidation of secondary alcohols

Reduction of alkenes

Reaction of oxygen atoms with hydrocarbons

Reaction of oxygen atoms with ozone.

Calcium cyanamide on treatment with steam under pressure gives NH₃and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

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