Question # 1

Stronger the oxidizing agent, higher is

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Redox potential

Standard reduction potential

Reduction potential

_{Oxidation potemial}

How should the conditions be changed to prevent the volume of a given gas from expanding when its mass increased?

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temperature and pressure both ara increased

temperature and pressure both are lowered

temperature is lowered and pressure is increased

temperature is increased and pressure is descreased

If internal energy of the system is increased

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Change in state of the system may occur

Temperature of the system may rise

Chemical reaction may take place

All of these

As the number of carbon atoms increases the number of isomers also increase. The 5 C compound pentane has as many as

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3 isomers

5 isomers

6 isomers

10 isomers

The vapour pressure of a liquid depends upon

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amount of the liquid

surface area

temperature

size of container

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

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Oxygen

Silicon

Aluminium

Aluminates

On adding NH3 to water

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lonic product will increase

[H3O+] will inerease

lonic product will decrease

[H3O+] will decrease

All the Hydrolytic reactions are

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First order

Second order

Third order

pseudo-first order

Evaporation occurs at all temperatures and is effected by

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surface area

temperature

intermolecular forces

all of these

Which of the following govern the diffusion of gases

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Dalton's law

Avogadro's law

Graham's law

Newton's law

Which of the following is not an electrophilic substitutional reaction of benzene?

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Free radical chlorination of benzene

Friedel Craft alkylation

Sulphonation

Nitration

How many allotropic forms are present in carbon?

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Two

Four

Three

Five

Enthalpy of formation of one mole of ionic compound form gaseous ion under standard condition is called

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Gibb's energy

Bond energy

Lattice energy

Phenol is completely soluble in water above

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25°C

62.3℃

68.5°C

66.50°c

When liquid solute is dissolved in liquid solvent, then the best unit of concentration is?

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% W/W

% W/V

% V/V

%V/W

Rusting of iron metal Fe occurs when Fe gets converted into Fe2O3 What happen with Fe?

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F'e is neutralized

Fe is sublimed

Fe is reduced

Fe is oxidized

Methyl cyanide, on boiling with mineral acids yield

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Acetic acid

Formic acid

Propanoie acid

Butanoic acid

Elastic collision involves:

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gain of energy

loss of energy

no relationship between elastic

no gain or loss of energy

Acetic acid reacts with thionyl chloride to form acetyl chloride, which species acts as nucleophile in the reaction

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SO3

SO2

Cl-

No nucleophile is formed

During combustion analysis, which one is used for absorbing carbon dioxide:

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50% KOH

5% KOH

Mg(ClO4)2

Silica gel

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

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

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

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

The root mean square velocity of a gas is doubled when the temperature is

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reduced to half.

reduced to one-fourth

increased four times

inereased two times

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

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multiples

equal

different

in fractions

Observed pressure of gas on the walls of container is less than actual pressure due to

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Hephazard motion

Inter molecular attractive forces

Elastic collision

Repulsive forces

The correct value of the gas constant R is close to

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0.082 litre-atm K^-1 mol^-1

0.082 litre-atm^-1 K mol

0.082 litre-atm K

0.082 litre-atm^-1 K mol^-1

Which one of the following is not associated with SN2 mechanism

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100 % inversion of configuration

Tertiar alkyI halides

2nd order kinetics

Change of hy bridization from sp³ to sp² in transition state

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

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10

1000

100

Infinity

The exothermic process is

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Evaporation

Sublimation

Respiration

Boiling

Ethane when completely halogenated in excess of chiorine can form

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Hexachloroethane

Dichloroethane

Pentachloroethane

1.1.2.2-terachloroethane

Which of the following is more reactive where 0-H bonds break

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P°alcohol

T° alcohol

S°alcohol

Cannot be predicated

Fe+2 is the co-factor for

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Chrome oxidase

Glucose-6-phosphatase

Carbonic anhydrase

Hydrolase

The reaction kinetics concerned with the

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Rate of reaction

Direction of reaction

Factor effecting rate of reaction

both a &b

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

Super conductors are derived from compounds of

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P-block elements

Lanthanides

Actinides

Transition elements

The reduction potentials of non-metals are A =+0.54V, B=+1.08V, C=+1.36V. D= +2.87V Which non -metal can displace all other from aqucous solution of their salts

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A

C

B

D

The nature of crystal of diamond is

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metallic

molecular

covalent

ionic

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

The synthesis of ethene from ethyl alcohol is a reaction

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Dehydration

Polymerization

Addition

Substitution

At which oxidation state Cu achieves electronic configuration of Zn+2

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0

+2

+1

+3

By increasing the concentration of reactants, the rate of reaction

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Decreases

Increases

Remains constant

Not predicted

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.

London forces are more affective at

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low temperature

high temperature

low pressure

low temperature and high pressure

Esterification of CH3COOH isreaction

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Acid base

Electrophilic

Redox

Nucleophilic

All gases can be compressed by:

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Keeping constant pressure

Decreasing pressure

Increasing pressure

None of above

In Boyle's law which of the following pair remains constant:

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Temperature and quality of a gas.

Pressure and quality of a gas.

Temperature and pressure.

Temperature and quantity of a gas.

Which is trigonal crystal

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CaSO₄. 2H²O

MgSO₄

NaNO₃

All

An example of simple protein is

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lipoprotein

Cholesterol

lecithin

globulin

Which of the following are not known to form compounds in more than one oxidation state?

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Transition metals

Halogens

Alkali metals

Noble gases

Which is the incorrect value of gas constant R?

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2.987 cal k^-1 mol ^-1

3.313 Nmk^-1 mol^-1

62400dm³ atm k^-1 mol^-1

1.10821atm dm3k^-1 mol^-1

An amine is produced in the following reaction
C2H5l+2NH3-------C2H5NH2 +NH4l. What is mechanism?

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

The strongest conjugate base is

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OH-

CH3O-

C6H5O-

CH3COO-

A real gas most closely approaches the behaviour of an ideal gas at

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15 atm. and 200 K

1 atm. and 273 K

0.5 atm.and 500 K

15 tm, and 500 K

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 conversion of molecules of A to B follows a second order kineties. Doubling the concentration of A will inerease the rate of formation of B by a factor of

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2

4

1/2

1/4

Which of the following tests helps to distinguish between alkyne and alkene?

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Lucas test

Tollen's reagent test

Baeyer's test

Fehling's solution test

Elements of group ll-A are called

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f-block elements

s-block elements

p-block elements

d-block elements

2-propanol on Oxidation gives

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Aldehyde

Carboxylic Acid

Ketone

Alcohol