Question # 1

In which of the following compounds hydrogen bonding is not present

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water

ethanol

ether

ammonia

The rate of reaction between A and B increases by a factor of 100, when the concentration of A is increased 10 folds, the order of reaction with respect to A is

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10

1

4

2

How many isotopes are present in palladium

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Two

Four

Six

nine

Charle's law only obeys when temperature takes in ______ scale

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Celsius

Fahrenheit

Kelvin

Rickey

Plaster of Paris is obtained from

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marble

bauxite

gypsum

limestone

The reagent used to distinguish between ethanol and propanal is

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I2/ NaOH

Benedict's reagent

LiAIH

sodium nitroprusside

Which of the following metal oxides is antiferromanetic in nature?

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MnO₂

TiO₂

NO₂

CrO₂

Solids in which atoms, ions or molecules are not regularly arranged are

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crystalline solid

amorphous solids

liquid crystals

low melting points

What can be deduce about two gases which have the same molecular mass:

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They have same numbers of atoms in a molecule

They have same rate of diffusion

They have same boiling points

They have equal solubility in water at room temprature

Deep sea divers breath air under increased pressure, therefore they use a mixture of

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96% N₂and 4% O₂

96% O₂and 4% N₂

94% N₂and 6% O₂

94% 0₂and 6% N₂

Which of the following tests helps to distinguish between alkyne and alkene?

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Lucas test

Tollen's reagent test

Baeyer's test

Fehling's solution test

Critical temperature of argon's gas is low. the reason is that

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it contains four lone pairs

it is mono atomic gas

it has as smell signed

its polarizability is low

Which one the following gases is ideal at -200°C?

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N₂

He

both

none

Under which condition CO has the maximum molar volume

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high T and P

Low T and High p

high T and low P

Low T and low P

In order to determine ∆H (latt) of ionic compound which is correct relationship

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∆H latt. = ∆Hf - ∆Hx

∆H latt. = ∆Ha + ∆Hv

∆H latt. = ∆Hf + ∆Hx

∆H latt. = ∆Hf - ∆H sol.

Halogens form halogen acids. HF is the weakest among all of them This is due to the reason that

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fluorine is a very small-sized atom

fluorine is highly electronegative atom

there is strong hydrogen bonding in HF

the polarity of HF bond is less

Which is correct?

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1 mm Hg = 1 torr = 1 atm

1 mm Hg = 760 torr = 1 atm

760 mm Hg = 760 torr = 1 atm

760 mm Hg = 1 torr = 1 atm

Enthalpy of neutralization (∆H°n) per mole of H2SO4/ Ba(OH)2 is

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+57.4 kJmol-1

-114.8 kJmol-1

-57.4 kJmol-1

Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0°C

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546°C

200°C

546 K

273 K

The conversion of molecules of A to B follows a second order kineties. Doubling the concentration of A will inerease the rate of formation of B by a factor of

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2

4

1/2

1/4

Which one of following property is not true about alkali metals?

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Strongest bases due to their hydrides

Low ionization energy

Oxidation number more than +1

Form acidic oxides

Oils and fats belong to the class of

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Alcohols

Hydrocarbons

Acids

Esters

At which oxidation state Cu achieves electronic configuration of Zn+2

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0

+2

+1

+3

The most unsymmetrical one in crystal system is

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triclinic

Li, Na, K

monoclinic

hexagonal

Which of the following decides the reactivity of alkyl halides?

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C-C bond strength

C-H bond strength

C-X bond strength

Electronegativity difference

Choose the correct equation among the following given by clauslus to understand to behaviour of molecules:

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PV =nRT

C_r.m.s= √3RT/M

d = PM/RT

PV = 1/3mnc^-2

The question vapour cause by heating a liquid is due to:

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increase of intermolecular interactions

increase of K.E of molecules

decrease of surface tension

increase in potential energy of molecules

Velaric acid is obtained from a herb velarian, its IUPAC name is

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Propionic acid

Pentanoic acid

Butyric acid

Caporic acid

Which pair of molecules have debye force

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Ne and Ne

Argon and water

Na⁺ion and water

Water and water

One dm3 of H2 and O2: has different masses but no. of particles are

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same

H2 has greater

different

O2 has greater

Among the following molecules, which one has coordinate covalent (dative) bond?

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CCI4

CO2

CO

CH4

If volume of an ideal gas at 0C° 536cm3, what is volume at 1°C

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373 cm3

646 cm3

Becomes 0cm3

746 cm3

Keeping the temperature constant, if the gas is expended:

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Kinetic energy of molecules will increase.

Number of gas molecules increases.

Temperature will increase.

Pressure will decrease.

If the energy of the activated complex lies close to energy of reactants, it means that reaction is

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Slow

Exothermic

Endothermic

Exothermic and fast

The standard reduction potential of Zinc is

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0.76V

0.34

-0.34V

-0.76V

The maximum possible number of hydrogen bonds in which a H₂O molecule can participate is

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1

2

3

4

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

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Ketone

Carboxylic

Alkyl halide

Ester

NH³ shows a maximum boiling point among the hydrides of V-A group elements due to :

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very small size of nitrogen

lone pair of electrons present on nitrogen

enhanced electronegative character of nitrogen

pyramidal structure of NH³

At STP,a container has 1 mole of Ar,2 moles of CO₂,3 moles of O₂ and 4 moles of N₂.Without changing the total pressure if one mole of O₂ is removed,the partial pressure of O₂

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Is changed by about 26%

Is halved

Is unchanged

Change by 33%

NaNO₃and CaCO₃crystals are Rhombohedral isomrophism is due to

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both soluble in water

their cations belong to S block element

same shape of NO₃^-1and CO₃^-2ions which is triangular planar

same number of O atoms

Freshly cut metals have a shining surface because

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electrons excited, then excited electrons release energy as light

metals have brittle nature

metals conductivity increases

metals are malleable and ductile

If allowed to expand, the gases suddenly

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heat up

move randomly

react

cool down

The product of pressure and volume remains constant when temperature and quantity of gas is:

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Zero

Variable

Kept constant

None of above

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

Which attractive forces cause molecular solids to be formed?

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lonic

Metallic

Covalent

van der Waals

A teacher told his student that air is a mixture. This is due to the reason that suddenly a student raised his hand and said:

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it has different properties from its constituents

oxygen can be removed from it

it is colourless

its composition is different at different altitudes.

If a gas expands at constant temperature

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The pressure decreases

The Kinetic energy of the molecules remains the same

The kinetic energy of the molecules decreases

The number of molecules of the gas increase

Glycerin boil at 290°C under normal atmospheric pressure. If the pressure is reduced to 50 mm of Hg, it will boil

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above the given temperature

below the given temperature

at the same temperature

at 25°C

In a saturated solution of AgCl, the molar concentration of Ag+ and Cl- is 1.0x10(-5)M each. What is the value of Ksp

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1.0x10(-5)

1.0x10(-15)

0.1x10(-5)

1.0x10(-10)

The attractive forces which exist between ionic compounds and water molecules are

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dipole-dipole forces

ion diopole forces

istantaneous dipole-induced dipole forces

dipole-induced dipole forces

The energy difference of d-orbitals varies from

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Atom to atom

lon to ion

Electron to electron

proton to proton

Ionic solids are characterized by

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low melting points

good conductivity in solid state

high vapour pressure

solubility in polar solvents

Temperature at which molecular motion ceases is called

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Absolute zero

Absolute temperature

Critical temperature

Difficult to predict

The volume of gas depends upon the------- moleules

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Size of

Space between

Molecular weight

both a and b

If increase in temperature and volume of an ideal gas is two times, then the initial pressure P changes to

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4P

P

2P

3P

In crystal of sodium chloride, a Cl-1 ion present at the corner of cube is shared between how many cubes?

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8

4

6

10

Under which condition CO has the maximum molar volume.

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high T and P

Low T and High p

high T and low pressure

Low T and low P

At same temperature which substance has high kinetic energy:

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Liquid water

N₂gas in a container

Solid piece of iron

Solution of alcohol and water

How many kinds of space lattices are possible in a crystal?

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23

7

230

14

The unit of R depends on

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Mole

Pressure volume

Temperature

None of these

Which of the following enthalpy change always have a negative value

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∆Hf

∆H sol

∆Hc

∆Hat