Question # 1

DDT is formed from

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Benzene and Chlorobenzene

Chloral and Chlorobenzene

Chloral and benzene

Chlorobenzene and chlorine

Which of the following nitrogen fertilizer contain more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

The symbol of the element whose atoms have the outer most electronic configuration 2s²sp³is

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N

Li

P

Na

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH₄or LiAIH₄?

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1-Propanol

2-Propanol

2-Methyl-2-propanol

Ethanol

Which for the following has greatest reducing power?

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Hl

HBr

HCl

Hl

Which is the most amphoteric?

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Na₂O

MgO

Al₂O₃

CaO

The rate of reaction between A and B increases by a factor of 100, and when the concentration with respect to A is increased 10 folds, the order of reaction w.r.t. A is

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10

1

4

2

Which is not a a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

The essential component of organic compound is

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O

C

P

N

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

On heating acetaldehyde with ammonical silver nitrate solution, we get

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CH₃OH

Silver acetate

HCHO

Silver mirror

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

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.

An endothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products.

Maximum number of active hydrogens

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Acetic acid

Glycerol

Methane

Methanol

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