Question # 1

coordination number of N^a+ in NaC is:

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1

2

4

6

Which of the following does not give yellow precipitate with I2+ NaOH

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Acetone

Benzaldehyde

Acetildehyde

Acetophenone

Air can be distilled fractionally because the constiltuents of the air:

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have different densities

can be liquefied

are gases at room temperature

have different boiling points

Which is correct?

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1 mm Hg = 1 torr = 1 atm

1 mm Hg = 760 torr = 1 atm

760 mm Hg = 760 torr = 1 atm

760 mm Hg = 1 torr = 1 atm

Lind's ,method for liquefaction of gases is based on the principle of:

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Graham's law of diffusion

Joule Thomson effect

Avogadro's hypothesis

Dalton's law of partial pressure

In voltaic cell a saht bridge is used in order to

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Pass the electric current

Prevent the flow of ions

Mix solutions of two half cells

Allow movement of' ions between two cells

Collagen is a fibrous protein present most abundantly in

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heart

nucleus

connective tissues

Arteries

The enzymes that catalyse the addition or removal of ammonia are:

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Lyases

Ligases

Transferases

Kinses

Which of the following is not a correct postulate of the kinetic theory of gases

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the gas molecules are in random motion

the collision between the molecules are perfectly elastic

the average kinetic energies of different gases are equal at a particular temperature

the pressure exerted on the walls of the container is due to intermolecular forces

For a chemical reaction in which one of the reactant also act as solvent, the order will be

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First order

Third order

Second order

pseudo-first order

Polarizability is responsible for intermolecular forces and it

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increases down the group

decreases down the group

almost remains the same

increased along a period

The synthesis of ethene from ethyl alcohol is a reaction

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Dehydration

Polymerization

Addition

Substitution

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

At different temperature, the vapour pressure of water is

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different

same

low

high

Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4

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I-propanol

2-Methyl-2-propanol

2-propanol

Ethanol

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

The kinetic energy of three moles of gas is:

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3/2 RT

3 RT

1/2 RT

2 RT

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

State of hybridization of carbon in the carbocation is

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sp3

sp

sp2

dsp2

Equal masses of methane and oxygen are mixed in an empty container at 25∘C.

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1/3

8/9

1/9

16/17

A graph between P and PV constant temperature and number of moles is parallel to:

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Y-axis

X-axis

Z-axis

Pressure axis

Compressibility factor for an ideal gas is

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1.5

1.0

2.0

0.5

SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode

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Zn has less reduction potential than hydrogen and Cu

Zn has high reductionl potential than hydrogen

and Cu

Zn is below electrochemical series than hydrogen and Cu

Zn has least tendency to lose electron

The B.P of glycerine at 760 torr pressure is

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200°C

290C°

250C°

262C°

The structure normally associated with ionic bonding is:

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a giant lattice

a simple molecule

a giant molecule

a regular arrangement of ions surrounded by a sea , or cloud, of electrons

Zine does not show variable oxidation state, because

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Its d-subshell is incomplete

Its d-subshell is complete

It is relatively soft metal

It has two electrons in outermost shell

Furan is a compound

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Acyclic

Alicyclic

Heterocyclic

non-aromatic

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

The most abundant protein in the human body is

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Collagen

Keratin

Myosin

Albumin

The volume of a gas that is occupied by its one mole at STP is called

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total volume

normal volume

molar volume

atomic volume

Dehydrohalogenation of secondary butyI bromide will give

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Propene

1-Butene

Butene

2-Butene

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

In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains

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Double

Same

Half

Four times

The highest oxidation state of manganese is

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+7

-7

+6

+4

The cause of deviation form ideal behaviour is because

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the actual volume of gas molecules is not negligible

there is force of attraction between molecules of a gas

both a and b

none of these

At compromise distance the forces dominating between atoms are

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repulsive forces

attractive forces

Dipole induced dipole force

H-bonding

In aldehydes and ketones carbon of carbonyl group is;

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sp³ hyhridized

sp² hybridized

sp hybridized

un hybridized

Steam causes more seers burns than boiling water. It is due to

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Latent heat of fusion

Latent heat of vaporization

Latent heat of sublimation

All of above

The intramolecular forces in gases are:

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Weak.

Normal.

Very weak.

Strong.

Which of the following is the element not present in all proteins?

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Carbon

Hydrogen

Nitrogen

Sulphur

Which of the following liquid has high vapour pressure?

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H₂O

ether

CH₃OH

C₂H₅OH

Polymorphism is shown by AgNO3. Which one of the following options is true for AgNO3?

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Orthorhombic and rhombohedral

Cubic and orthorhombic

Cubic and tetragonal

Monoclinic and hexagonal

The number of molecules in one dm³of water is close to:

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6.02/22.4 x10²³

12.04/22.4 x10²³

18/22.4x 10²³

55.6x6.02x10²³

Compound X & Y give effervesce with Na2CO3, solution. X gives a white ppt with ammonical AgNO3 while Y gives sweet smell compound on heating with alcohol X &Y are

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Formic acid & acetic acid

Acetone & formic acid

Acetaldehy de & acetic acid

Acetic acid & acetone

The pressure exerted by the vapours in equilibrium with its pure liquid at given temperature is called the

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equilibrium pressure

atmospheric pressure

vapour pressure

external pressure

Which of the following is a base according to lowery Bronsted concept?

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I-1

HCl

H3O+

NH4+1

Diamond is a bad conductor because

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it has light structure

it has a high density

there are no free electron present in the crystal of diamond to conduct electricity

it transparent to light

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

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Evaporation

Effusion

Conduction

Diffusion

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

All of the following substances are crystalline except:

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carbon

ice

plastic

sucrose

Which of the following molecules has angel of 120°

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BeCl2

BF3

CH4

NH3

Which of the following are more temperature senesitive

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Liquid crystals

Solid crystals

Ionic stals

None of above

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

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Sc

Mn

Ti

Zn

Which one of the following reaction of carboxylic acid is reversible?

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Esterification

Salt formation

Reaction with PCI5

Reaction with SOCI2

Which pair of following pair is metalloid?

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Antimony and bismuth

Phosphorous and arsenic

Nitrogen and phosphorous

Arsenic and antimony

The pressure exerted by gas molecules is due to their

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collisions

densities

masses

kinetic energy

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

When a metal rod is dipped in its one molar ionie solution

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Electricity is produced

Electricity is consumed

Redox reaction occurs

Potential difference is set up

What types of bonds are broken when water turns into steam on heating?

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covalent

permanent dipole interactions

hydrogen bonds

induced dipole interactions

The mass of 8.5 dm³of oxygen gas at 0.0821 atm and -1°C is

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100 g

10 g

1 g

0.1 g

Which is not mineral of AI?

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Diaspore

Corrundam

Bauxite

Galena