Question # 1

The molecular mass of a polymer is obtained by multiplying mass of the monomer unit with the degree of polymerization, The degree of polymerization of PVC is 1000.What is molecular mass?

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65000

63000

62000

60000

The products of electrolysis of which of the followings are known

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Fused electrolyte

Aqueous solution of eleetrolyte

Solid electrolyte

Solid metal

Which of the following alcohols is least reactive with respect to 0-H bond

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CH3OH

CH-CH2-OH

(CH3)2-CH-OH

(CH3)3OH

The attractive forces between molecules of a gas and their sizes can be ignored at

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high pressure

low temperature

low temperature and high pressure

low pressure and high temperature

When graph is plot between P and 1/V at constant temperature. A straight line obtains which move toward ______ when temperature increase

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Pressure axis

Volume axis

1/V axis

1/P axis

A mixture of H₂, H2 and CH₄has total number of 0.51 mole and total pressure of 1 atmosphere. If the mass of H₂is 0.8 gram, then its partial pressure is

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0.4 atm

0.6 atm

0.776 atm

0.667 atm

Buffer solutions are used in except

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Clinical analysis

Nutrition

Soil science

Qualitative analysis

Which one of the following is used as coagulant for purification potable water:

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copper sulphate

alum

barium

nicket sulphate

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called

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Fibre

Plastic

Varnish

Polyamide resin

Which type of motion is exhibited by gases?

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Vibrational

Transitional

Rotational

All of them

Which of these polymers is an addition polymer?

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nylon 6,6

polystyrene

terylene

epoxy resin

Which is the formula of tetra-ammine chloronitro platinum (VI) sulphate?

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[Pt(NH₃)₄(NO₂)]SO₄

[PtNO₂Cl(NH₃)₄]SO₄

[PtCl(NO₂)(NH₃)₄]SO₄

[Pt(NH₃)₄(NO₂)Cl]SO₄

Phenol is used in the preparation of

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Bakelite

Phenatherene

Cellulose

All of these

Which of the following elements is most metallic?

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P

As

Sb

Bi

Which of the statements given below concerning properties of solution, describe a colligative effect?

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Boiling point of pure water decreases by the addition of ethanol

Vapour pressure of pure water decreases by the addition of nitric acid

Vapour pressure of pure benzene decreases by the addition of naphthalene

Boiling point of pure benzene increases by the addition of toluene

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

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

Aldehydes can be distinguished from ketones by using

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Schiff's reagent

Conc. H₂SO₄

Anhy. ZnCl₂

Resorcinol

Which one of the following is a colligative property?

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Surface tension

Osmotic pressure

Viscosity

Refractive index

N₂3H₂⇌ 2NH₃

_{Which of the following change will favorthe formation of more}NH₃at equilibrium in above reaction :

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By adding NH_3.

By removingH_2.

By decreasing pressure.

By increasing pressure.

A buffer of a 0.09 molar acetic acid and 0.11 molar sodium acetate has pH = 4.83. If 0.01 mole NaOH in 1 dm³of the buffer solution is added, then pH of the buffer becomes

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4.74

4.92

5.0

4.0

Which element does not belong to 3d transition series

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Ti

V

Mn

Te

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