Question # 1

According to charles law there will be a change in the volume of a given mass of a gas by 1/273 of its original volume at 0°C if the temperature of the gas is changed by

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10°

1°C

100°C

2°C

The rate of diffusion of two gases are inverselly proportional to the square roots of their densities or molecular weights, is a statement of

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Charle's Law

Boyle's Law

Graham's Law

Dalton's Law

Among the following the polycyclic aromatic compound is

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Styrene

Naphthalene

Toluene

Acetophenone

Which of the following configurations corresponds to alkaline earth metals?

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[Ar] 3d10, 4s2

[Ne] 3d2, 3p2

[Ar] 4s2

[Ar], 3d10, 4s1

The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives

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Ethene

Alcohol

Diethyl ether

Carboxylic acid

Which of the folowing compound is expected to be colored

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Na2SO4

ZnCl2

MgF₂

CuF₂

The volume of an ideal gas is decreased to half, What will happen to the force exerted on the walls of the container by the gas particles?

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the force is halved

the force increases by a factor of 4

the force remains constant

the force increased by a factory of 2

L-asparginase is helpful in treatment of

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skin disease

blood cancer

heart failure

obstructive jaundice

For a particular halogen, the reactivity of alkyl halides

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remains same with C-increase

decreases with C-increase

increases with C-increase

decreases with C-decrease

Which of the following does not give yellow precipitate with I2+ NaOH

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Acetone

Benzaldehyde

Acetildehyde

Acetophenone

Which ion has maximum number of unpaired electrons in 3d subshell and shows maximum paramagnetic behavior?

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Cr+3

Ni+2

Co+2

Fe+3

When wine is put in air, it becomes sour due to

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Oxidation of C2H5OH

Formation of C2H5NH2

Reduction of C2H5OH

Dissolution of CO2

According to Hess's law, the enthalpy change for a reaction

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Depends on path

Independent of the path

The sum of ∆E and ∆H

None of these

In Boyle's law which of the following pair is variable:

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Temperature and quantity of a gas.

Pressure and volume.

Volume and quantity of a gas.

Pressure and quantity of a gas.

The formation of ester from acetic aciad in presence of acid and ethanol is a

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Nucleophilic substitution reaction

Nucleophilic addition reaction

Electrophilic substituion reaction

Electrophilic addition reaction

Which one of the following has the lowest pH values

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0.1 M HCI

0.01 M HCl

0.1 M KOH

0.01 M KOH

Substance which is formed as well as consumed during a chemical reaction and have temporary existence.

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Reactant

product

Catalyst

Intermediate

Bragg's law is given by equation

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n λ = 2 θ sin θ

nλ = 2 d sin θ

2nλ = d sin θ

n λ= 1/2 d sin θ

Which one of the following statements about positive ions is incorrect?

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they are also known as cations

they are formed when electrons are removed from atoms

they are larger than the atom from which hay were formed

they are smaller than the atom from which they were formed

Density of H₂gas at 0°C is 0.09 under 1 atmospheric pressure. The density of O₂gas under the same conditions of temperature and pressure is

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0.36

1.00

1.44

1.18

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

Plastics are amorphous solids and

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have sharp melting points

undergo clean cleavage when cut with knife

do not undergo clean cleavage

possess orderly arrangement over long distances

The density of ice is 1.00gcm^-3.

What the volume of steam produced when 1.00-3 of ice is heated to 323^{∘C (596K) at a pressure of one atmosphere (101kPa)?}

[1 mol a gas occupies 24.0dm³ at 25a^∘C(295K)and one atmosphere.]

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0.267 dm³

1.33 dm³

2.67 dm³

48.0 dm³

Boiling point of water remains 100°C although heat is continuous supplied. it is because

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decomposition of water takes place

hydrogen bonding is increased

external atmospheric pressure is not changing

kinetic energy of H₂O molecules is increasing

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

Which of the following test is not given by aldehvde

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2. 4 DNPH test

NaHSO3 test

Tollen's test

Sodium nitroprusside test

Which of the following reactants will be required to form ethene from ethyl chloride

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_{Alcoholic KOH}

Alkaline KMnO4

Aqucous KOH

Aqucous NaOH

The energy difference of d-orbitals varies from

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Atom to atom

lon to ion

Electron to electron

proton to proton

Decomposition of H2O is

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Endothermic reaction

Nuclear reaction

Exothermic reaction

Zero nuclear reaction

The order of reaction provides valuable information about of reaction

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Condition

Concentration

Mechanism

Parameters

In which of the following Equilibria will Kc and Kp have not the same value

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2HI <--------> H2+I2

2SO2 + O2 <--------> 2SO3

N2 + O2 <---------> 2NO

All of these

The exothermic process is

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Evaporation

Sublimation

Respiration

Boiling

Half-lives required to convert 100% reactant to produet for a first order reaction are

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10

1000

100

Infinity

Which one is a non-polar compound?

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SnCl2

PH3

Gecl4

H2O

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

The cell which converts electrical energy to chemical energy is called

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Electrochemical cell

Voltaic cell

Galvanic cell

Down's cell

choose the temperature among the following at which real gas obeys ideal gas laws when pressure range is appreciable:

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critical temperature

boyle's temperature

inversion temperature

transition temperature

Formation of Picric acid from phenol needs heating, one possible reason for it is

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acidity of phenol

e- donating nature of-OH

acidity of picric acid

e- with drawing effect of- NO2

London dispersion forces are the only force present among the:

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molecules of water in liquid state

atoms of helium in gaseous state at high temperature

molecules of solid iodine

molecules of hydrogen chloride gas

What is the sequence of electron take up and removal from 4s orbital a transition metal in 3d series?

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Enters first, leaves after 3d electrons removal

Enters after 3d electrons, leaves after 3d electrons

Enters after 3d eleetrons, leaves first

Enters first and leaves first

Which of the following statement about graphite is not true?

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The coordination number of carbon atoms is 4.

the carbon atoms are arranged layers.

the layers in graphite are attracted to each other weak forces.

the corbon atoms use only three of their four outer electrons for covalent bonding.

An example of ion-dipole force is solution of

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NaCl in water

Glucose in water

Bromine in benzene

Ethanol in water

In which of the following compounds hydrogen bonding is not present

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water

ethanol

ether

ammonia

Which of the following is the simplest form of matter?

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Gaseous state

Liquid state

Solid state

All of above

250cm of 0.2 molar potassium sulphate solution is mixed with 250cm of 0.2 molar KCI solution. The molar concentration of K ions is:

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0.2 molar

0.25 molar

0.3 molar

0.35 molar

Liquids are less common than solids and gases because

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They exist in narrow range of temperature and pressure

They have definite volume

Liquid molecules can slide past each other

Molecules contain three type of motion

London forces are more affective at:

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high temperature

low temperature

low pressure

high pressure

Stronger the intermolecular forces

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Lower the Vapour pressure

Greater the Vapour pressure

May be smaller or greater

None

Propanoic acid is functional group isomer of

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Methyl acetate

Ethyl acetate

Propanal

Proparone

On the basis of intermolecular forces diamond is a

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ionic solid

covalent solid

metallic solid

molecular solid

Gases are good conductor of electricity at

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Low temperature

Low pressure

High pressure

Low temperature and high pressure

Which of the following has isomorphous structure with MgO

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NaF

S

Sn

N

Amount of heat absorbed when one mole of a solid melts into liquid form at its melting point is called:

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heat of vaporization

latent heat of fusion

molar heat of fusion

molar heat of sublimation

Which of the following equations represents the 2nd ionization energy of Na?

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Na(g) ---> Na²⁺ (g) + 2e^-

Na(s) ---> Na²⁺ (g) + 2e^-

Na⁺(s) ---> Na²⁺ (g) + e^-

Na⁺(g) ---> Na²⁺ (g) + e^-

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

In diamond, the carbon atoms are arranged in a

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tetrahedral manner

hexagonal manner

square planar manner

octahedral manner

Equal volume of all gases at same temperature and pressure contain number of molecules

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different

multiples

equal

in fractions

In solid, the temperature is the measure of:

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Rotational kinetic energies.

Translational kinetic energies.

Vibrational kinetic energies.

None of above.

The study of which one of the followings guides to the mechanism of the reaction

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Order of reaction

Rate of reaction

Half-life period of reaction

Rate determining step

Allotropic forms of carbon are:

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five

three

four

two

Which of the elements has seven electrons in d-subshell?

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Zn

Co

Cu

Fe