Question # 1

A state function which describes together the internal energy and product of pressure and volume is called

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Enthalpy

internal energy

Work

Kinetic energy

Which molecule is least ionic"

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NaCI

HCL

HF

CsF

Naturally occurring isotopes of silver are

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,Two

, Four

, Forty seven

, sixteen

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 not a postulate of the kinetic theory of gases?

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when gas particles collide, their total kinetic energy increases

gases consist of molecules in a constant state of random motion

when gas particles collide their total kinetic energy does not change at all

The gas particles travel in straight lines unit they collide with one another or with the walls of the container

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

If V₁= 5 litters, P₁= 2 atm, T₁= 273°C, T₂= 0°C and V₂= ? When P₂= 1 atm.

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5 lit

10 lit

2.5 lit

12.5 lit

Which one the following is not postulated in the kinetic molecular theory of gases

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molecules of all the gases have same size and same mass

molecules are in chaotic motion

all molecular collisions are elastic

the volume of the molecules is negligible

what is it difficult to cook food at high as compared to at sea level? Choose the correct reason.

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H-bonding in H₂O changes with height

temperature at the top of mountain is low

density of water decreases at the mountain

boiling point of water decreases at the mountain

Carboxylic acid is more acidic than phenol because of the greater stability of

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Carboxylic acid

Phenoxide ion

proton

Carboxylate ion

The pi-electrons in the styrene are

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13

10

8

6

The reaction which is responsible for the production of electricity in the voltaic cell is

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Hydrolysis

Oxidation

Reduction

Redox

Born-Haber cycle is an application of

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Hess's law

1" law of thermodynamics

Avogadro's law

1law of thermochemistry

Which of the substance is not going to react the sodium metal:

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Acetic acid

Methanol

Di methyl ether

Ethanol

[Ti (H20)6]3+ ion isin colour.

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Yellow

Blue

Violet

Red

Benzene has pi electron

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2

4

6

8

Cyclobutane structure is categorized under

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Aromatic compounds

Aliphatic compounds

Alicyclic compounds

Heterocyclic compounds

Which of the following substance has maximum critical temperature

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H₂O

N₂

SO₂

Ne

The process of effusion is best understood by law

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Grahams

Boyle s

Charles s

Avogadro s

In solid, the temperature is the measure of:

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Rotational kinetic energies.

Translational kinetic energies.

Vibrational kinetic energies.

None of above.

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

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isomorphous

anisotropic

isotropic

polymorphous

Choose the gas law which gives relationship between volume and pressure:

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Bolye,s law

Graham,s law

Dalton,s law

Charles,s law

The reaction between Cu and conc. H2SO4 produces

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Cu+2

SO₂

SO₃

H₂

Amount of product formed increases with time, this statement is true for reactions-------with kinetics

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1s order

3rd order

zero order

Any order

5604 cm3 of H2 gas at STP contains atoms of hydrogen

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6.02×10 (23)

2.6x10(22)

3.01x10(23)

1. 50x 10(23)

Oxidation state of Mn' in KMnO4. K2MnO4, MnO2 and MnSO4 is in the order

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+7.+6.+2,+4

+6,+7,+2,+4

+7. +6.+4.+2

+4, +6, +7,+2

Air contains 78% N₂, 21% O₂ and 1% other gases at sea level the partial pressure of O₂ is

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760 torr

159 torr

592 torr

7.6 torr

The oxidation state of carbon in C2O-²4 is

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+4

-4

+3

+2

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

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50% KOH

5% KOH

Mg(ClO4)2

Silica gel

Which of the following compound have empirical formula, but no molecular formula

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H20

C6H6

H₂O₂

NaCl

The deviation of a real gas from ideal behaviour is maximum at

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-10.0°C and 50 atm

-10°C and 2 atm

100°C and 2.0 atm

0°C and 2 atm

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

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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reduced to 1/4

be double

increases four times

remains unchanged

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

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multiples

equal

different

in fractions

Which one of the following is more acidic

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Phenol

Carboxylic acid

Alcohols

Amines

Coinage metals Cu. Ag, and Au are the least reactive because they have

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Negative reduction potential

Positive reduction potential

Negative oxidation potential

Positive oxidation potential

Which of the following molecule has zero dipole moment?

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PCI3

BF3

NH3

H2O

Which of the following gases have maximum root mean square velocity at 25°C:

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SO₂

NH₃

CO₂

H₂S

Which of the following is primary alkyl halide

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IsopropyI halide

Sec-butyl halide

Tert-buryi halide

Neo-pentyl halide

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

If ionic product is equal to Ksp then the solution is

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Unsaturatec

Ideal

Supersaturated

Saturated

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

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AlO

AlO₂

Al₂O₃

Al₃O₂

Naphthalene has two fused aromatic ring of carbon atom the molecular formula

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C10H8

C10H14

C10H10

C12H12

Consider gas is measure in bars then the units of rate of reaction is

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Mole dm-3 sec

Bars sec

Mole dm-3 sec-1

Bars sec-1

Pressure of 1Nm^-2 is equal to

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One bar

1 psi

One pascal

One atmosphere

The amount of heat absorbed when one mole of a liquid is changed into vapours at its boiling point is called

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Heat of sublimation

Heat of vaporization

Heat of fusion

Enthalpy change

Alpha helix and beta pleated sheath are secondary structures of protein which are maintained by

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dipole forces

non-polar interactions

ionic bonds

Hydrogen bonds

Simplest Structure of a protein that has only covalent bonding between amino acids is

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2° structure

3°structure

1° structure

4° structure

Reactivity of carbonyl compounds is due to

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Electrophilic carbon

Less stearic hindrance

Unsaturation of Co

Polarity of bond

Which pair of following pair is metalloid?

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Antimony and bismuth

Phosphorous and arsenic

Nitrogen and phosphorous

Arsenic and antimony

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

Hardness of diamond is attributed to the

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strength of the ionic bonds in the structure

three-dimensional network of covalent bonds

absence of valence electrons in carbon atoms

If volume of an ideal gas at 0C° 536cm3, what is volume at 1°C

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373 cm3

646 cm3

Becomes 0cm3

746 cm3

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

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LiBr

KCI

MgO

NaF

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

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different

multiples

equal

in fractions

In nucleophilie substitution bimolecular reaction the order of reaction with respect to substrate

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2 order

3 order

1st order

Zero order

Which of the following is electrophile for alkylation?

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NO+2

SO3

R+

Both a & b

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

Which of the following is not the application of plasma

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Fluorescent light bulb

Removal of hazardous chemical

Neon signs

Corrosion effective

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

Dehydrogenase is an erample of

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Transferase

Hydrolase

Lyase

Oxido-reductase