Question # 1

Detergents are

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synthetic products

natural products

both a and b

none of the above

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

Which impurity makes the shape of NaCl crystal needle like

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MgSO4

urea

glucose

MgCO3

Electrons in 5d energy level are filled up in case of

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Lanthanides

Transition metals

Actinides

Rare gases

Which of the following may be called London dispersion forces

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dipole-dipole forces

ion-dipole forces

dipole-induced dipole forces

instantaneous dipole-induced dipole forces

The heat of hydrogenation of most of the alkene is about

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120 kJ/mol

100 kJ/mol

140 kJ/mol

105 kJ/mol

London dispersion forces are also called

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Ion-dipole forces

Dipole-induced dipole forces

Dipole-dipole forces

Instantaneous dipole induced dipole forces

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

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Blow air

Add Na₂CO₃

Use a specially made sorbent having fluorine trapped in it

Use a sorbent having Al₂O₃trapped in it

The number of molecules in one dm³of water is close to:

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6.02/22.4 x10²³

12.04/22.4 x10²³

18/22.4x 10²³

55.6x6.02x10²³

The particles in solids are

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widely separated and moving randomly

widely separated not moving

moving randomly but not separated

close together and vibrating slightly

The solid particles posses only ______ kinetic energy

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Translational

Rotational

Viberational

Circular

In its reaction with Na, 1 mol of X gives 1 mol of H_2(g). What is X

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CH₃CH₂CH₂CH₂OH

(CH₃)₃COH

CH₃CH₂CH₂CO₂H

CH₃CH(OH)CO₂H

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm, atomic weight

One gm, Equivalent

Eletrochemical equivalent

None of the above

β-D-glucose is a monomer for

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Strach

Cellulose

Glycogen

Protein

The factor which effect the rate of reaction

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Nature of reactants

Surface area

Light

All of the above

The ionic strength of a solution containing 0.1 mole/kg of KCl and 0.2 mole/kg of CuSO₄is

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0.3

0.6

0.9

0.2

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The value of K_pfalls with a rise in temperature

The value of K_pfalls with increasing pressure

Adding V₂O₅catalyst increase the equilibrium yield of sulphur trioxide equilibrium yield of sulphur trioxide

The value of K_pis equal to K_c

The rate of E₁reaction depends upon

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The concentration of substrate

The concentration of nucleophile

THe concentration of substrate as well as nucleophile

None of the above

The value of R (Rydberg's constant) is _______ m-1

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1.0974 x 107

1.0842 x 107

1.082 x 10-7

Both a and b

Which of the following compounds gives trichoromethane on distilling with bleaching power?

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Methanal

Phenol

Ethanol

methanol

______ is used in breathing equipments for mountaineers and in space craft

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Li₂O

BeO

N₂

KO₂

The maximum number of electrons in the outermost shall of s-black elements is

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One

Two

Three

Four

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