Question # 1

Mercury is the only metal which is liquid at 0°C. this is due to its

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Very high ionization energy and weak metallic bond

Low ionization potential

High atomic weight

High vapour pressure

When metallic sodium in ether is heated with ethyl chloride, which alkane is formed

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Propane

Ethane

Iso-butane

N-butane

Williamson's synthesis is used to prepare

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Diethylether

Phenolphthalein

Hydrogenation

Bakelite

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

Their e/m, ratio resembles with that of electrons

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Alpha rays

Beta rays

Gamma rays

X-rays

In H₂O molecule the bond angle is

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90°

109.5°

107°

104.5°

The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called

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Kolbe's reaction

Perkin's reaction

Sandmeyer's reaction

Schotten Baumann reaction

Which of the following charge

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Li

Be

H

He

Acetal is produced by reacting alcohol in the presence of dry HCl with

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Acetaldehyde

Ketone

Ether

Carboxylic acid

If acetyl chloride is reducing in the presence of BaSO₄and Pd, then

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CH₃CHO is formed

CH₃CH₂OH is formed

CH₃COOH is formed

CH₃COCH₃is formed

Equal volumes of ethylene glycol (molar mass = 62) and water (molar mass = 18) are mixed. The depression in freezing point of water is (given K_rof water = 1.86 K mol^-1kg and specific gravity of ethylene glycol is 1.11)

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0.003

3.33

0.333

33.3

Which of the following reactions occur at moderate rate :

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Rusting of iron

Chemical weathering of stone work of buildings by acidic gases in atmosphere.

Hydrolysis of an ester

Fermentation of sugars

The number of subatomic particles in atoms sidcovered is more than:

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110

100

125

90

The rate determining step is the :

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Slowest step.

Fastest step.

Moderate step.

Both (a) and (b).

Shape of CIO₃is

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Triangular pyramidal

Tetrahedral

Triangular planar

Triangular bipyramidal

The sum of mole percent of all the components of solution is always equal to :

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Less than 100

One

100

10

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Essentialα-amino acids are those which are necessary in the diet

Which one is an essentialα-amino acids

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Alanine

Aspartic acid

Glycine

Tryptophan

Preparation of vegetable ghee involves:

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Halogenation

Hydrogenation

Hydroxylation

Dehydrogenation

When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as

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Cannizaro reaction

Sabatier-secderens reaction

Alkylation

Kolbe's reaction

Domestic waste mostly constitutes

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Non-biodegradable pollution

Biodegradable pollution

Effluents

Air pollution

Organic compounds generally react at ______ rates

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Slow

Fast

Moderate

None of them

Rutherford's model of atom failed because:

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The atom did o have a nucleus and electrons

It did not account fro the attraction b/w protons and neutrons

It did no account for the stability of the atom.

There is actually no space b/w the nucleus ad the electrons.

The elements of f-block are also known as

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Inner-transition

Outer transition

Normal elements

Alkaline earth metals

One mole of SO₂contains

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6.02 x 10²³atoms of oxygen

18.1 x 10²³, molecules of SO₂

6.02 x 10²³atoms of sulphur

4 gram atoms of SO₂

Vegetable oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

The osmotic pressure of a dilute solution is directly proportional to the

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Diffusion rate of the solute

Ionic concentration

Elevation in boiling point

Flow of solvent from a concentrated to a dilute solution

Synthetic rubber is made by polymerization of

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Chloroform

Acetylene

Divinlacetylene

Butene

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There is no change in temperature

No change in volume

Heat is absorbed

Heat is released

3-d series elements are present in:

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First period

Second Period

Third period

4th period

Chief source of water and soil pollution is

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Mining

Thermal power plant

Agro-industry

All the above

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