Question # 1

The Catalyst used in the contact tower for the manufacture of H₂SO₄ is easily poisoned by:

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Nitrous oxide

Nitrogen gas

Arsenic oxide

Carbon dioxide

The graph between pressure and volume at constant temperature for gas is:

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Isobaric

Isothermal

Isotherm

None of above

The element which exhibits maximum catenation property is

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C

Pb

Ge

Sn

Paramagnetic behaviour is caused by the presence of

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Unpaired electrons

Paired electrons

Paired protons

Paired electrons in an atom. molecule or ion

Which one of the following elements is not an alkali metal?

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Na

Sr

Cs

Rb

Reaction of alcohol with hydrogen chloride, in the presence of Zinc chloride yields

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Ketone

Carboxylic

Alkyl halide

Ester

2-Propenol, on rearrangement, yields

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Propanal

Propanone

2-propano

Both A and B

During sudden expansion of a gas energy is needed to overcome the intermolecular:

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Vibrations

Attractions

Repulsions

All of above

The densities of two gases are in the ratio of 1 : 16.The ration of their rates of diffusion is

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16 : 1

4 : 1

1 : 4

1 : 16

Which of the following govern the diffusion of gases

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Dalton's law

Avogadro's law

Graham's law

Newton's law

Which of the following statement is not true?

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The pressure of a gas is due to collision of the gas molecules with the walls of the container.

The molecular velocity of any gas is proportional to the square root of the absolute temperature.

The rate of diffusion of a gas is directly proportional to the density of the gas at constant pressure.

Kinetic energy of an ideal gas is directly proportional to the absolute temperature.

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

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Acetic acid

Acetaldehyde

Formaldehyde

Formic acid

Identify the incorrect statement with respect to ozone

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Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen

Ozone is more reactive than diaoxygen

Ozone is diamagnetic whereas dioxygen is paramagnetic

Ozone protects the earth's inhabitants by absorbing gamma-radiations

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

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CHF Cl C FCl

CH Cl CF₂Cl

CHF CF₂Cl

C FCl CF₂Cl

XeF₄has shape of

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Sphere

Trigonal bipyramidal

Tetrahedral

Square planar

Which of the following is weakly acidic in nature

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Alcohol

Phenol

Aidehyde

Amide

The percentage of H is the highest in

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CH₄

NH₃

H₂SO₄

C₆H₁₂O₆

Which of the following is hypnotic?

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Acetaldehyde

Metaldehyde

Paraldehyde

None

Which of the following is a steroid

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Vitamin A

Vitamin B

Vitamin C

Vitamin D

The self linking of carbon atoms is called

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Chelation

Isomerism

Catenation

None of the above

Formic Acid is obtained from Red out by:

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Distillation

Crystallization

Filtration

sublimation

Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution

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White

Red

Yellow

None of these

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