Question # 1

Acetic acid reacts with thionyl chloride to form acetyl chloride, which species acts as nucleophile in the reaction

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SO3

SO2

Cl-

No nucleophile is formed

The substances which soften the polymer are called

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stabilizers

plasticizers

retarders

pigments

Which pair of the gases doesn't obey Dalton's Law of partial pressures

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H₂and O₂

N₂and O₂

H₂S and H₂

NH₃and HCl

On hydrolysis sucrose gives

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Glucose and maltose

Fructose and lactose

Fructose and maltose

Glucose and fructose

Purines include

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Adenine

Guanine

Both a and b

None

The ratio of most probable velocity to that of average velocity is

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π/2

2/π

√π/2

Crystal lattice of the substances can be categorized into

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five types

seven types

six types

none of these

The process of effusion is best understood by law

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Grahams

Boyle s

Charles s

Avogadro s

Doubling the pressure in a liquid phase reaction

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Will double the rex

Will increase the rex

Will decrease the rex

Will not alter the concentration of reactant

Ketones are less reactive than aldehydes because:

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alkyl groups electorn donation

steric hindrance is greater in ketone

both a and b

ketones are non-polar

Which noble gas is used in mixture used for breathing by divers?

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Ge

Ar

Kr

He

The colour of transition metal complexes is due to

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d-d transitions of electrons

Para magnetic nature of transition elements

Ionization

Loss of s-electrons

For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their

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Activation energy

Average energy

Potential energy

Collisions frequency

A special application of the Hess's law to binary ionic compounds of M⁺X^-type in calculation of their lattice energies is

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Enthalpy of reaction

Born-haber cycle

First law of thermodynamics

Enthalpy of combustion

Metals which are above SHE in electrochemical series

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Can liberate H₂from acid

Cannot liberate H₂from acid

Cannot always liberate H₂from acid

None of these

Cotton is ______% cellulose

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90

100

99

30

Iodoform test is given by:

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Formaldehyde and Higher ketones

Formaldehyde

Acetaldehyde and methyl ketones

Acetaldehyde

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

The gasoline having octane No. 100 has ______

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More knocking

Less knocking

No knocking

Only knocking

The liquid obtained after passing the mixture through filter paper is termed as :

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Extract.

Residue.

Filtrate.

Sample.

In electrolytic cells, the chemical changes may be :

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Either spontaneous or non-spontaneous

Always spontaneous

Always non-spontaneous

More spontaneous and less non-spontaneous.

The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits

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Metamerism

Tautomerism

Enatiomerism

Geometrical isomerism

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