Question # 1

Ar has low critical temperature and pressure due to its

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small size

monatomic molecule

low polarizability

liquefaction temperature close to room temperature

The polymers which can be re-softened again and again are called

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Thermoplastic

Thermosetting

Both a and b

None

Which one of the following does not show isomerism?

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Propane

Hexane

Butane

Pentane

Pathogens in raw water are killed in step:

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aeration

coagulation

chlorination

treatment

A real gas obeying Vander Waal's equation will resemble ideal gas if

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Both a and b are large

Both a and b are small

a is small and b is large

a is large and b is small

In solid, the temperature is the measure of:

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Rotational kinetic energies.

Translational kinetic energies.

Vibrational kinetic energies.

None of above.

Which of the following is not a macromolecule?

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diamond

graphite

iodine

silica

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

Which alcohol is most reactive towards sodium metal?

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Ter Butyl alcohol

n-Propyl alcolol

Isopropyl alcohol

Have same reactivity

Oxidation of secondary alcohol produces

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Aldehyde

Ketone

Alkyl halide

Ester

When light is exposed to transtion element, then electrons jump from lower orbitals to higher orbitals in

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Orbitals of s-subshell

Orbitals of d-subshell

Orbitals of p-subshell

between different shells

Wohler succeeded in obtaining, urea from

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Cyanogen

Ammonium cyanate

Ammonium hydroxide

None of these

Carboxylic acids functional group is:

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----COOH

-----COH

----CO---

----OH

Pressure volume work is

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With the increase in size of halogen atom the reactivity of an alkyl halide

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Increases

Decreases

Remain constant

None of these

During electrolysis, the reaction that takes place at cathode is :

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Reduction

Both (a) and (c)

Oxidation

No reaction occurs

Which one is the most toxic?

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Carbon

CO

CO₂

SO₂

Molecular orbital picture of N₂indicates

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One unpaired electron

Two unpaired electron

No unpaired electron

None of these

(CH₂O)_nis general formula for

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Monosaccharides

Oiligosaccharides

Polysaccharides

None of these

Transition elements are called so because:

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Form interstital sompounds

have high m.p

In between 's' and' 'p' block elements

All of these

The reaction rate is expressed in the units of

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Mol dm^-3S^-

Mol dm^-3

Mol dm^-3N^-

dm^-3S^-

Which of the following oxides is unlikely to dissolve in aqueous hydroxide

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Al₂O₃

MgO

SO₂

SIO₂

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