Question # 1

Which of the following laws study the pressure-volume relationship of a gas at constant temperature,we get

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a straight line

a curve with different peaks

straight line parallel to x-axis

a curve called isotherm

Reaction of acetic acid with LiAIH4 gives

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Ethanol

Ethanal

Ethane

Ethyl acetate

The products of electrolysis of which of the followings are known

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Fused electrolyte

Aqueous solution of eleetrolyte

Solid electrolyte

Solid metal

The total pressure exerted by a mixture of gases is the sum of the partial pressure of all the gases present is a statement of

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Charle's Law

Boyle's Law

Dalton's Law

Graham's Law

The order of reactivitv of alksI halides towards nucleophile is

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RI>RBr RF>RCI

RF>RCI>RBr>RI

RI>RBr> RCI>RE

RF>RBr>RCI>RI

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

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 enthalpies of all elements in their standard states are

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Unity

always +ve

always -ve

zero

The specie that develops strongest hydrogen bonding with water

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НСООН

B.CH3CH2СООН

CH3СООН

CICH2COOH

Real gases deviate at low temperature from ideal behaviour due to

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there is transitional motion of molecule

the collissions between the molecules are decreased

volume of gas is decreased

the inter molecular attractive forces become significant

One molecule of gas is approximately Distance______ times its own diameter from its neighbour at room temperature.

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30

3000

3

300

Water has high boiling point which is due to:

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high electric constant

weak dissociation

high specific heat

H-bonding between its molecules

Buffer action can be explained by except

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Common ion effect

Le-Chatelier's principle

Law of mass action

Solubility product

According to Avogadros law 1 mole of gas at S.T.P has a volume of

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22.4 dm³

24 dm³

24000 cm³

2m³

The acidity of phenol is due to its

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Nature of Benzene

Double bond in benzene ring

Natute of phenoxide ion

Hydroxyl group

Which of the following shows group IIIB

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Zn, Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

Among the following the polycyclic aromatic compound is

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Styrene

Naphthalene

Toluene

Acetophenone

Energy of atom in compound is

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Higher than individual atom

Lower than individual atom

equal to individual atom

Impossible to predict

consider the physical properties of the gases. Which of the following statements about particles of gases is incorrect? The particles are:

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causing pressure

having wide spaces

orderly arranged

randomly moving

Temperature at which molecular motion ceases is called

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Absolute zero

Absolute temperature

Critical temperature

Difficult to predict

What is the reason of ionic solids for not conducting electricity?

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free electrons are less

ions don't have translatory mention.

ions don't have translatory mention

the coordination number of the ion is very high.

Benzene reacts with Ethyl chloride in presence of AICls to give

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Benzalchloride

Benzyl chloride

Ethyl benzene

Benzotrichloride

1 gram formula refers to

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Amount in grams equivalent to 1 mole of a atom

Amount in grams equivalent to 1 mole of a covalent compound

Amount in grams equivalent to 1 mole of a ionic compound

Amount in grams equivalent to 1 mole of an ion

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

In an elimination reaction a more substituted alkene is formed due to the stability associated with

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Free radical

transition state

Activated complex

Carbocation

Which is an intermediate in Svl

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Ethoxide ion

Alkene

Alkyl halide

Carbocation

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

Which of the following liquid has high vapour pressure?

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H₂O

ether

CH₃OH

C₂H₅OH

Which set of elements is good loser of electrons

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F2. Cl2, Br2

N, P. As

O. S, Se

Li, Na, K

About 25% of earth crust mass is made up of element

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Oxygen

Silicon

Aluminium

Aluminates

For an ideal gas, number of mole in terms of its pressure P, temperature T and gas constant is

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PT/R

PRT

PV/RT

RT/P

London forces are more affective at:

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high temperature

low temperature

low pressure

high pressure

Gases show uniform behavior towards their:

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Internal conditions.

External conditions.

Internal and external conditions.

None of above.

For a chemical reaction which can never be a fractional no

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order

molecularity

half-life

rate constant

Which liquid is more volatile?

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water

mercury

benzene

honey

Aluminium is in Group lll, its oxide will have the formula.

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AlO

AlO₂

Al₂O₃

Al₃O₂

The measurement of enthalpy change at standard conditions means that we should manage the measurement at

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24°C at 1 atm

25°C at 1 atm

0C° at 1 atm

100C° 1 atm

The gas which obey's the gas laws at all conditions of temperature and pressure is called:

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Perfect gas

Super gas

Ideal gas

Real gas

Denaturation of proteins is often characterised by

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Loss of biological activity

Aiways being irreversible

Being ereater the lower the temperature

Changes in primary structure

During the electrolysis of Fused NaCI, the products are

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Na and H2

Na and Cl2

Na and O2

H2 and Cl2

Which one of the following statements about sodium chloride is incorrect?

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it has a high melting point

it conducts electricity at room temperature

it is soluble in water

it is brittle

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

At constant pressure, if the original volume is 546 cm³at which temperature the volume of gas 552 cm³

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1°C

2°C

3°C

4°C

Which solids are called true solids

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Crystalline

Vitreous

Amorphous

Metallic

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

Cooling happens under the Joule Thomson Effect due to sudden:

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Contraction.

Absorption.

Expansion.

All of above.

Which of the followings has electronic configuration of Ar in +3 oxidation state

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Sc

Mn

Ti

Zn

All of following acids have hydrogen bond in liquid state except:

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nitric acid

sulphuric acid

hydrochloric acid

hydrofluoric acid

Which will not react with phenol

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NaOH

Br2

KMn04/OH-

Na

Water may boil at 170C when external pressure is

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760 torr

170 torr

2115 torr

700 torr

Which is the least reactive of all the alkali metals

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Li

Na

K

Cs

Enthalpy of a reaction can be measured by

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Glass calorimeter

Barometer

Manometer

Thermometer

Which of the following molecule has zero dipole moment?

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PCI3

BF3

NH3

H2O

If the four tubes of a car are filled to the same pressure with N₂, O₂, H₂ and helium separately,then which one will be filled first.

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N₂

O₂

H₂

He

Hydrogen bonding is extensively present in proteins which form the spiral. The hydrogen bond being produced is between

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nitrogen and hydrogen atom

oxygen and hydrogen atom

carbon and hydrogen atom

oxygen and carbon atom

The lattice energy of NaCl is

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787 j/ mole

790 kj/mol

780 kJ/ mol

-787 kI / mole

Keeping in view different factors which affect the melting point of a substance.the compound having melting point among the following is:

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LiCl

NaCl

CsCl

RbCl

Which among the following will show anisotropy?

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Wood

Glass

Paper

BeCl2

NaCI has face centered cubic structure. The Na ion at the face of the unit cell is shared by

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2-unit cells

4-units cells

only one unit cell

8-unit cells

Group of element belongs to IIB group

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Zn. Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

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