Question # 1

Matter having no definite shape and volume is called:

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gas

liquid

solid

plasma

Grey tin crystals belong to

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tetragonal

cubic

orthorhombic

rhomtrohedral

Theoretically, the temperature at which volume of gas become equal to zero is called

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Boiling point of water

Zero absolute

Zero Kelvin

both B and C

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

Variable Oxidation state of is related to transition elements

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empty d-subshells

Completely filled

Partially filled d-subshell

d-d transition

The isomerism in which the compounds differ with respect to functional group but have same molecular formula is called

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Metamerism

Functional group isomerism

Position isomerism

Chain isomerism

The reaction kinetics concerned with the

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Rate of reaction

Direction of reaction

Factor effecting rate of reaction

both a &b

Proteins have linkage between amino acids

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imide

amide

ester

ether

The highest temperature in which a substance can exist as a liquid is called its

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Absolute temperature

Critical temperature

Maximum temperature

Body temperature

Which reagent is responsible for the conversion of ketone to secondar alcohul

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NaAlH

NaBH4

Al

Red P

The rate of diffusion of a gas is inversely proportional to:

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Density of a gas

Velocity of the gas

Viscosity of the gas

All of above

When a compressed gas is allowed to pass through a nozzle of a jet into a region of low pressure, it produces

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cooling

vaporization

fusion

expansion

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

The forces which are present between the ions and the water molecules are known as

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

London dispersion forces

The non polar gases of low polarizability have a very:

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Low critical temperature

Stable critical temperature

High critical temperature

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

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 type of isomerism shown by alkyl halides is

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geometric

functional

positional

metamerism

When two ice cubes are pressed together they unite to form one cube. which of the following forces is responsible for holding them together?

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H-bonding

Covalent bonding

van der waal's forces

dipole-dipole interaction

Based on the physico-chemical properties, proteins may be classified into the following types

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Simple proteins

Compound proteins

Derived proteins

All of the above

According to Boyles law, at constant temperature the product of pressure and volume of a given mass of gas is

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whole number

a constant

fraction

a multiple

Which ion is most polarising?

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AI³⁺

Ba²⁺

Mg²⁺

Na⁺

Which one of the followings is resistant to oxidation under normal conditions

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Methyl alcohol

Acetaldehyde

Ethyl alcohol

Acetone

Absolute zero, the lowest temperature on kelvin scale lies at

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-273°C

273°

-100°C

100°C

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will

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remain unchanged

increase four times

reduce to 1/4

be doubled

Which if the following will have the same number of molecules at S.T.P?

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280cm³ of CO₂ and 280cm³ of N₂O

11.2dm³ of O₂and 32g of O₂

44g of CO₂and 11.2dm³ of CO

28g of N₂and 5.6dm³ of oxygen

One degree on Celsius scale is ______ time greater then Fahrenheit scale

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9/5

5/9

6/5

5/6

Coinage metals Cu, Ag and Au are the least reactive because they have

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Negative reduction potential

Negative oxidation potential

Positive reduction potential

Positive oxidation potential

Most reactive among the following

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Li

Mg

Ca

Na

d-d transition cannot be observed in

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Cr

Cu

Mn

Zn

The Sl mechanism for the hydrolysis of an alkyl halide to an alcohol involves the formation of

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Carbocation

Carbanion

Pentavalent carbon in the transition state

Free radical

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

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1

2

3

4

Ice floats on water because

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the hydrogen bonding in ice is stronger than that of in water

empty spaces are left in ice

ice has two-dimensional structure

the bond length of the oxygen and hydrogen bond is different in water and ice

H2O and HF are the hydrides of the second period. Fluorine is more electronegative than oxygen. Anyhow, the boiling point of water is greater than that of HF. This is due to:

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water is more polar than HF

water has a bent structure

HF has a zig zag structure after making hydrogen bonding

the number of hydrogen bonds produced by water are greater than that of HF

AgNO₃ is a polymorphic having two different crystalline forms which are

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cubic, tetragonal

monoclinic, hexagonal

cubic, orthorhombic

orthorhombic, rhombohedral

which one pair has the same oxidation state of-Fe?

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FeSO4 and FeCl4

FeCl4and FeCl3

FeSO4 and FeCl2

Fe2(SO4)3 and FeSO4

What are the conditions under which the relation between volume (V) and number of moles (n) of gas is plotted? (Pressure; T-temperature)

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constant P and T

constant P and V

constant T and V

constant n and v

There is more deviation in the behaviour of a gas from the ideal gas equation PV = nRT

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At high temperature and low pressure

At low temperature and high pressure

At high temperature and high pressure

At low temperature and low pressure

Alkanes do not show geometrical isomerism due to

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Hyperconjugation

Resonance

Rotation around single hond

Restricted rotation around doubled bond

The solubility of A2B3 is X mole dm-3. Its Ksp is?

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6X(5)

36X(5)

64X(5)

108X(5)

Which of the substance is not going to react the sodium metal:

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Acetic acid

Methanol

Di methyl ether

Ethanol

The nature of crystal of diamond is

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metallic

molecular

covalent

ionic

Which one of the following elements is most electropositive out of group I -A and II-A group?

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K

Mg

Na

Ca

Which is the incorrect value of gas constant R?

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2.987 cal k^-1 mol ^-1

3.313 Nmk^-1 mol^-1

62400dm³ atm k^-1 mol^-1

1.10821atm dm3k^-1 mol^-1

In which of the following molecules, strongest H-bond is shown?

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hydrogen fluoride

water

hydrogen sulphide

ammonia

The volume of given mass of gas is directly proportional to absolute temperature when pressure is kept constant this is called

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Boyle's law

Charles's law

Graham's law

Dalton's law

All gases can be compressed by:

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Keeping constant pressure

Decreasing pressure

Increasing pressure

None of above

Which of the following is not molecular crystal

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Sugar

Iodine

Ice

Graphite

NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called

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Enthalpy of reaction

Enthalpy of Neutralisation

Enthalpy of formation

Enthalpy of combustion

The compressibility factor of an ideal gas is

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0

1

2

4

The number of NaCI molecules in unit cell of its crystal is

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2

4

6

8

Zinc reacts with dilute acids to liberate hydrogen. This is because:

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Zn2+ ion is a powertul osidising agent than H' ion

H+ ion is a powerful oxidising agent than Zn ion

Zn2+ ion is a powerful reducing agent than H' ion

H+' ion is a powerful reducing agent than Zn- ian

Which of the following gives silver mirror with ammonicaT AgNO3

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Benzyl alcohol

Benzene

Benzoic acid

Benzaldehyde

In a given system, water and ice are in equilibrium, if the pressure is applied to the above system then

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Morc ice is formed

Amount of ice and water will remain the same

more ice is melted

both A and B

Hardness of diamond is attributed to the

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strength of the ionic bonds in the structure

three-dimensional network of covalent bonds

absence of valence electrons in carbon atoms

The elements of group I-A react violently with water and make the solution

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neutral

amphoteric

acidic

alkaline

Compressibility factor for an ideal gas is

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1.5

1.0

2.0

0.5

What forces operate between ethyl group of ethyl alcohol and oxygen of water

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H-bonding

attractive forces

repulsive forces

dipole forces

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

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373 cm3

646 cm3

Becomes 0cm3

746 cm3

The surface formed by the breakage of a crystal is called _____ plane

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Crystal

Unit

Cleavage

None

Which of the following has no hydrogen-bonding

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Diethyl ether

Water

Ethyl alcohol

Phenol