Question # 1

Which one among the following is not a good leaving group

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HSO4-

CI-

OH-

Br-

Correct relationship b/w Kc and Kp can be written as

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Kp=, Kc(R)∆n

Kc=Kp (RT)∆n

Kp.= Kc.(RT)∆n

Kp=Kc (R/N)∆n

Which gas diffuses more rapidly?

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O₂

SO₃

NH₃

H₂

The oxidation of SO2 to SO3 is exothermic reaction. The yield of SO3 will be maximum if

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Temperature is increased and pressure is kept constant

Temperature is reduced and pressure is increased

Both temperature and pressure are increased

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

Reactivity of carbonyl compounds is due to

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Electrophilic carbon

Less stearic hindrance

Unsaturation of Co

Polarity of bond

Identify the compound, which give iodoform test

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Methanol

3- Hexanol

Methyl ketone

Propionaldehyde

Which one is an isomorphic pair?

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NaNO3, CaCO3,

NaF, MgO

K2SO4 ,K2Cr2O7

Zn, Cd

Which of the following has positive value of enthalpy

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Neutralisation

Atomization

combustion

All of the above

Which element of group V-A and VII-A does not use d-orbital?

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Nitrogen

Sulphur

Arsenic

Chlorine

The system in which two out of three axes are of equal length and angles are all 90°

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cubic system

hexagonal system

trigonal system

tetragonal system

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

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Sodium

Potassium

Magnesium

Copper

If similar groups are attached to the same side, of C=C of alkene then it is

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Cis isomer

Trans isomer

Tautomer

AIl

The rate of reaction for a reaction is 30 mol dm-3sec-1 if the product of concentration of 10.reactant is unity the specific rate constant is

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25

2.5

30

15

Cl₂is a gas while iodine is a solid due to

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stronger London forces with high polarizability

greater electro negativity of Cl than iodine

stronger dipole dipole forces

iodine is colored while chlorine is colourless

Which of the following undergoes easy dehydration?

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3-MethyIbutan-2-ol

Ethanol

2.Methylpropan-2-ol

Methanol

The alcohol that does not form curbonyl compound on oxidation

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iso-butyl alcohol

neo pentyl alcohol

Ethanol

ter-butyl alcohol

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

Ethanol reacts with sodium metal to liberate

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CO2 gas

CO gas

H2 gas

Steam

The pH of neutral water is 6.8 then the temperature of H2O is

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25°C

More than 25°C

less than 25 C°

Not predicted

Addition of unsymmetrical reagent to an unsymmetrical alkene is governed by

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Cannizzaro's Reaction

Aldol Condensation

Kirchhoff Rule

Markownikov's Rule

The transition temperature of KNO3, is

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13.2°C

95.5°C

128°C

32.02°C

The specifie substance (metabolite) that fits on the enzyme surface and is converted to products is called

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Co-factor

Isoenzyme

Prosthetic group

Substrate

The original volume of a gas at 0° is 273 cm³at constant pressure, its volume at 273°C becomes

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zero cm³

546 cm³

446 cm³

346 cm³

Which one is correct about conjugate acid-base concept?

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Conjugate base of a very weak acid is relatively very strong

Conjugate base of a very weak acid is relatively very weak

Conjugate base of a very strong acid is relatively very weak

Both A and C

Strong dipole-dipole forces among the liquid molecules are responsible for

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very high heat of vaporization

very low heat of vaporization

cannot be predicted

negligible forces are these

One of the following does not give the flame test. Which is that

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Sr

Bа

Be

Na

When the concentration of reactants is taken as unity the rate of reaction is equal to

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average rate

concentratian of reactant

instantaneous rate

specific rate constant

Ethyl alcohol reacts with PCL and produces:

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Haloalkane

Alkyl halide & H3PO3,

Alkyl halide & POCl3

Alkyl halides &H3PO4.

One of the best applications of Hess's law to calculate the lattice energy of ionic compound is

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Measurement of enthalpy change in a calorimeter

Studying of first law of thermodynamics

Measurement of a heat of formation of a compound

Born-Haber cycle

A basic buffer solution can be prepared by mixing

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Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Weak acid and its salt with strong base

Deep sea divers take oxygen with:

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A heavy gas

A lighter gas

An inert gas

All of above

The structure of sodium chloride is

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simple cube

body centered cubic

face centered cubic

depends upon conditions

Total number of valence electrons in phosphonium ion (PH4-) is

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8

9

12

10

According to kinetic molecular theory, kinetic energy of molecules increases when they are:

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melted from solid to liquid state

frozen into a solid

condensed into liquid

mixed with other molecular at low temperature

Air at sea level is dense.This is a practical application of

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

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

Which of the following reactions are usually slow?

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Neutralization of acids and bases

Displacement Reactions

Organic substitution reaction

Free radical reactions

In a cubic lattice a unit cell is shard equally by how many unit cells?

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4

2

6

8

The typical range of the H-bonding is:

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1-2 kj/mol of bonds

5-25 kj/mol of bonds

500 kj/mol of bonds

Which of the following is not a property of crystalline solid

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geometric shape

cleavage plane

anisotropy

isomerism

Which of the following statement is not true?

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The pressure of a gas is due to collision of the gas molecules with the walls of the container.

The molecular velocity of any gas is proportional to the square root of the absolute temperature.

The rate of diffusion of a gas is directly proportional to the density of the gas at constant pressure.

Kinetic energy of an ideal gas is directly proportional to the absolute temperature.

Number of moles present in 0.6 gram of silica is (Atomic mass Si = 28, O=16)

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0.01 mole

0.064 mole

0.044 mole

0.054 mole

The reaction which is zero order

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Decomposition ofN2O5

Formation of Glucose in plant

Formation of Fel2

Chorination of methane in sunlight

The respiration process taking place in animals depends upon a difference in:

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vapour pressure

osmotic pressure

partial pressure

atmospheric pressure

The gas which obeys the gas laws at all conditions of temperature and pressure is

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ideal gas

perfect gas

real gas

noble gas

2-propanol on Oxidation gives

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Aldehyde

Carboxylic Acid

Ketone

Alcohol

Which of the following factors does not affect the SN1 rate is

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Nucleophilicity of the attacking nucleophile

Stability of the carbonium ion

Solvent system

The nature of leaving group

The movement of gas molecules from a region of high pressure to vacuum is called:

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Evaporation

Effusion

Conduction

Diffusion

LiF is a crystalline substance and has

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ionic crystal

metallic crystal

covalent crystal

molecular crystal

The enzyme which is found in saliva, accelerates the conversion of starch into sugar is

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Pepsin

Thrombin

Ptyalin

Fumarase

Ester with raspberry flavor

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Amyl acetate

Isobutyl formate

Amyl butyrate

Octyl acetate

Collagen is a fibrous protein present most abundantly in

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heart

nucleus

connective tissues

Arteries

In a saturated solution of AgCl, the molar concentration of Ag+ and Cl- is 1.0x10(-5)M each. What is the value of Ksp

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1.0x10(-5)

1.0x10(-15)

0.1x10(-5)

1.0x10(-10)

The crystal system which has all cell angles equal, but not 90°and less than 120° , the system is

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orthorhombic

monoclinic

hexagonal

rhombohedral

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

Molar volume of CO₂ is maximum at

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NTP

0°C and 2.0 atm

127°C and 1 atm

273°C and 2.0 atm

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

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isomorphous

anisotropic

isotropic

polymorphous

Alicyclic compounds are the homocyclic compounds which contain a ring of

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5 or more carbon atoms

6 or more carbon atoms

3 or more carbon atoms

4 or more carbon atoms

Which of the following is a strong acid

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CH3COOH

C2H5OH

HCOOH

Phenol

The reaction C2H5CI + aqueous KOH---------C2H5OH+ KCI is

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Electrophilic addition

Nucleophilic addition

Electrophilic substitution

Nucleophilic substitution