Question # 1

Tertiary alcohols have alpha bydrogens

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1

Zero

2

3

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

Stronger the intermolecular forces

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Lower the Vapour pressure

Greater the Vapour pressure

May be smaller or greater

None

Plasma was introduced by

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Crookes

Soddy

Faraday

Van der Waal

Ester with raspberry flavor

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Amyl acetate

Isobutyl formate

Amyl butyrate

Octyl acetate

The nature of the attractive force in acetone and chloroform are

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

instantaneous forces

Furan is a compound

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Acyclic

Alicyclic

Heterocyclic

non-aromatic

Dehydrohalogenation of secondary butyI bromide will give

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Propene

1-Butene

Butene

2-Butene

The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute

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Oxidation

reduction

Redox reaction

electrolysis

Which of the following metal cannot evolve hydrogen from the acetic acid

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Sodium

Potassium

Magnesium

Copper

The density of neon will be highest at

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STP

0°C, 2 atm

273°C, 1 atm

273°C, 2 atm

A crystal system in which the unit cell has different all cell lengths but all angles equal to 90° it is called as

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orthorhombic

triclinic

monoclinic

cubic

An element that is not an essential par of proteins is

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O

N

H

S

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

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6X(5)

36X(5)

64X(5)

108X(5)

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

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AlO

AlO₂

Al₂O₃

Al₃O₂

Compressibility factor for an ideal gas is

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1.5

1.0

2.0

0.5

ln ethyl alcohol, the bond that undergoes heterolytic cleavage most readily is

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C-C

C-O

C-H

O-H

The most abundant protein in the human body is

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Collagen

Keratin

Myosin

Albumin

Stalagmometer is used to measure

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the resistance to flow of a liquid

capillary action of a liquid

Meniscus of the liquid

surface tension of the liquid

State of hybridization of carbon in the carbocation is

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sp3

sp

sp2

dsp2

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

Butane has isomeric forms

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3

4

2

1

Which of the following element has high m.p and b.p, it acts as a reducing agent, and can react with bases?

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Sr

Ca

Be

Mg

In the reaction A2 (g) + 4B2 (g) <-----------> 2AB4 (g) such that ∆H < 0, the formation of AB4(g) will be favoured at

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Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

High temperature and high pressure

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

Choose the example having hexagonal system:

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graphite

sugar

sulphur

diamond

Ionic crystals are brittle because

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they have cubic geometry

they are bad conductors of electricity

coordination number of cations and anions is same

cations and anions are arranged in alternate positions in layers

Molar mass of formic acid in benzene comes out to be

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64

46

32

92

In van der Waal's equation of state of the gas law,the constant 'b' is measure of

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Intermolecular repulsions

Intermolecular collisions per unit volume

Volume occupied by the molecules

Intermolecular attraction

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

Two substances that have the same crystal structure are said to be

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isomorphous

anisotropic

isotropic

polymorphous

According to kinetic theory of gases kinetic energy depends on

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Temperature

Collision

Pressure

Atomic number

A term to express the partial pressure of water vapours in a gas is known as

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vapour pressure

aqueous tension

partial pressure

moisture

In the equation PV = nRT which one cannot be numerically equal to R

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8.31 x 10⁷ erg⁷ K^-1 mol^-1

8.31 x 10⁷ dynes Cm K^-1 mol^-1

8.31 JK^-1 mol^-1

8.31 L atm K^-1 mol^-1

What is the co-ordination number of face centered cubic structure?

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12

8

6

10

The element which shows highest binding energy

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V

T

So

Cr

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

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

in diamond a unit cell is tetrahedral and averall crystai structure is

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face centred cubic

body centred cubic

tetrahedral

hexagonal

If Cl2 is passed through hot NaOH. NaCIO3 is formed and the oxidation number of CI changes from

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-1 to 0

0 to +5

0 to-1

0 to +1

Which volume of gas has minimum value

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Apparent volume

Actual volume

Excluded volume

All have equal value

LiF is a crystalline substance and has

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ionic crystal

metallic crystal

covalent crystal

molecular crystal

Diamond is a bad conductor of electricity because:

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it has a tight structure

it has a high density

there are no free electrons

none of the above

Which one of the following groups is indicated when HCI is formed by reaction of ethanol with phosphorous pentachloride?

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Amino group

Halide group

Hydroxyl group

Hydride group

Volume of O₂gas at 0°C is 273 cm³, then volume of O₂gas at -10°C is

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263 cm³

163 cm³

173 cm³

73 cm³

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

Coordination number of Zn and ZnS (Zinc blends) is

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4

6

2

None of these

Which of the following liquid has highest bolling point

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HCI

HBr

H2O

Br2

NaCI is completely ionized in water due to the presence of:

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dipole-dipole forces

ion- dipole forces

H-bonding

London dispersimforces

Pressure remaining constant at which temperature the volume of a gas will become twince of what it is at 0∘C.

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546∘C

200∘C

546K

273K

One atmosphere is equal ___________ Pascal

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760

101325

14.7

1.01325

The boiling of water may be 120°C, when the external pressure is

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greater than 760 torr

less than 760 torr

equal to 760 torr

variable

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

When a compressed gas is allowed to expand into a region of low pressure, it produce:

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Vapours

Cooling effect

Heating effect

None of above

Benzene in the presence of AICl3 produces acetophenone when reacts with

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AcetyI chloride

EthyI benzene

Acetic acid

Ethanoic acic

Which of the following successive ionization energies belong to a Group ll element?

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320,600,1110,1700,5650,

577,1820,2740,1160,14800,

428,3070,4600,5860,7990

736,1451,7740,10500,13600

NH₃shows maximum boiling among the hydrides of group V elements. The is due to:

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pyramidal structure of NH₃

H-bonding between its molecules

enhanced electronegative character

very small size of nitrogen

Stability of Cu-metal is due to filled of d-orbital

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Half

Completely

Partially

Quarterly

Intermolecular forces are _________ than binding forces

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stronger

Equal

Weaker

None

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

An element from the given below exists as discrete small molecules in the solid state. Which is that?

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Sodium

Silicon

lodine

lron