Question # 1

Which of the following shows group IIIB

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Zn, Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

ΔH° represent the enthalpy change at

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0°C and 1 atm pressure

25°Cand 1atm

0K and I atm pressure

25°C and 2 atm pressure

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

According to Boyle's law, which parameters give a straight line parallel to x-axis, when we plot a graph between:

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V and T

P and V

P and 1/V

P and PV

Propanone does not undergo

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Oxime formation

Reduction of Fehling solution

Hydrazone formation with hydrazine

Reaction with HCN

Phenol can be diatingushed from ethyl alcohol by all of the following reagents except

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lodoforrn test

Na

Br2 /H2O

NaOH

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

Which of the following is exact relationship between °F and C°

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°F= 5/9[°C-32]

°C = 5/9 [°F]+32

°F = 9/5°C+32

All

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.

2-propanol on Oxidation gives

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Aldehyde

Carboxylic Acid

Ketone

Alcohol

What will be the pH of 1.0 mol dm-3 of NH4OH, which is 1% dissociated

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2

12

0

2.7

Which ion is most polarising?

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AI³⁺

Ba²⁺

Mg²⁺

Na⁺

Acetone and Chloroform are soluble in each other due to

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intermolecular hydrogen bonding

ion-dipole interaction

instantaneous dipoles

dipole-induced dipole interaction

Meniscus is the shape of the surface of a liquid in a cylindrical container:

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meniscus may be convex

meniscus is concave

meniscus may be convex or concave depending upon the nature of metal

meniscus is plane

Ionic solids are characterized by

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low melting points

good conductivity in solid state

high vapour pressure

solubility in polar solvents

Doubling the pressure in a liquid phase reaction

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Will double the rex

Will increase the rex

Will decrease the rex

Will not alter the concentration of reactant

Reaction of acetic acid with LiAIH4 gives

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Ethanol

Ethanal

Ethane

Ethyl acetate

The most complex strueture a single polypetide can assume is

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1° structure

2°structure

3° structure

4° structure

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

Chloroform (CHCl3) is?

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

a liquid

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

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1

2

3

4

The amount of heat required to convert one mole of solid into liquid is called

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molar heat of fusion

heat of fusion

heat of vaporization

heat of liquefaction

Highest oxidation state af the transition elements is

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+8

+7

+5

+1

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 is a non-typical transition element?

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Cr

Zn

Mn

Fe

Which of the following will undergo nucleophilic addition reaction more easily?

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Aldehyde

Alkene

Aldehyde and ketone equally

Neither aldehyde nor alkenes

Keeping in view the charge density select the compound amoung the following having highest lattic energy:

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LiBr

KCI

MgO

NaF

Which of the following statement about the order of reaction is true?

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The order of reaction can only be determined by experiment

a second order reaction is also bimolecular

The order of reaction is always non-zero

The order of reaction increases with increasing temperature

When a metal rod is dipped in its one molar ionie solution

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Electricity is produced

Electricity is consumed

Redox reaction occurs

Potential difference is set up

Vapour pressure of a liquid

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increasing with increase of temperature

increases with decrease of temperature

increases with size of container

increases with volume of liquid

The nature of crystals formed due to London forces of interaction are

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molecular

metallic

ionic

covalent

Born-Haber cycle is an application of

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Hess's law

1" law of thermodynamics

Avogadro's law

1law of thermochemistry

Lactoglobulin is found in

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nucleus

nerve cells

Plants only

muscles and in plants

The vapour density of a gas is 11.2.The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 litres

11.2 litres

1 litre

2.24 litres

The amount of energy released when gaseous ions of opposite charges combine to give one mole of a crystalline ionic compound is called

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bond energy

heat of formation

lattice energy

ionization energy

In crystal structure of sodium chloride,the arrangement of CI^- ions is

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Fcc

Both fcc and bcc

Bcc

None of these

Ethyl alcohol reacts with PCL and produces:

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Haloalkane

Alkyl halide & H3PO3,

Alkyl halide & POCl3

Alkyl halides &H3PO4.

Ethene C₂H₄and N₂gases diffuse at the same rate at room temperature. it is due to the reason

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these are non polar gases

their molecular masses are same

both are covalent molecules

both have multiple bonds

Intermolecular forces are _________ than binding forces

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stronger

Equal

Weaker

None

Glucose and fructose are isomers

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Chain isomers

Position isomers

Functional group isomers

Metamers

Oxygen molecule is 16 times heavier than:

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Helium

Hydrogen

Neon

Aluminium

Under what conditions do real gases show close to ideal gas behavior?

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low pressure, low temperature

high pressure, low temperature

low pressure, high temperature

high pressure, high temperature

The curve which is obtain from Boyle's law is called as

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Isochoric

Isotherm

Adiabatic

All of these

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

By increasing pressure two times and decreasing temp. two times the volume of gas

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Volume increases 4 times

Volume decreases 4 times

Volume increases 2 times

Volume decreases 2 times

Only those metals can replace Hydrogen from dilute acids, which have

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High negative reduction potential

Low negative reduction potential

High positive reduction potential

low positive reduction potential

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

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Crystal

Unit

Cleavage

None

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

All the following have crystals except:

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potassium bromide

diamond

cadmium sulphide

sodium chloride

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Nucleophilic addition

Electrophilic substitution

Electrophilic addition

Nucleophilic substitution

Choose from the followings the correct statement about Born Haber cycle

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Born Haber cycle is different from Hess's law

The energy changes in a cyclic process is not zero

The lattice energy of crystalline substances can be calculated easily

None

Which of the following gives positive haloform test and positive Fehling solution

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Acetone

Echanol

Acetaldehyde

Formaldehyde

Formalin contains-------% alcohol.

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37

80

8

52

The value of van der Waal s constant a for gases CO₂, N₂, and SO₂, are 3.59 ,1.39, 1.36, and 6.17 atm dm⁶ mol^-2respectively the gas which can be most easily liquefied is

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CO₂

O₂

N₂

SO₂

The maximum number of isomer for an alkene with the molecular formula C2H8

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2

3

4

5

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

What will be the pH of 1.0 mol dm -3 of H2X, which is only 50% dissociated

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1

0

2

Less than 0

The reaction kinetics concerned with the

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Rate of reaction

Direction of reaction

Factor effecting rate of reaction

both a &b

An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is

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СН3СOOH

HCOOH

CI2CHCOOH

Сl3CCOOH

An ideal gas, obeying Kinetic theory of gases cannot be liquified, because

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its critical temperature is above 0°C

its molecules are relatively small in size

It solidifies before becoming a liquid

Forces acting between its molecules are negligible

Which of the following has isomorphous structure with MgO

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NaF

S

Sn

N