Question # 1

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

Choose an answer

12

8

6

10

Keeping in view different factors which affect the melting point of a substance.the compound having melting point among the following is:

Choose an answer

LiCl

NaCl

CsCl

RbCl

The order of reaction provides valuable information about of reaction

Choose an answer

Condition

Concentration

Mechanism

Parameters

The relationship which describes the variation of vapour pressure with temperature is called

Choose an answer

Hess's law

Arrhenius equation

Kirchhoff's law

Clausius-Clapeyron equation

Catalyst used for ammonia synthesis is

Choose an answer

Cu

Co

Zn

Fe

Which of the following bond is responsible for joining the amino acids in proteins?

Choose an answer

Metallic Bond

Di sulfide bond

Peptide Bond

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

Choose an answer

Yellow

Blue

Violet

Red

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

Choose an answer

-10.0°C and 50 atm

-10°C and 2 atm

100°C and 2.0 atm

0°C and 2 atm

What is not correct about ∆HF

Choose an answer

It is always negative

Ìts value gives an idea about the relative stability of reactants and the products.

Its value can be greater or less than zero

Value depends upon nature of bonds

Stalagmometer is used to measure

Choose an answer

the resistance to flow of a liquid

capillary action of a liquid

Meniscus of the liquid

surface tension of the liquid

What will be the pH of 1.0 mol dm -3 of H2X, which is only 50% dissociated

Choose an answer

1

0

2

Less than 0

Plasma was introduced by

Choose an answer

Crookes

Soddy

Faraday

Van der Waal

Which of the following does not represent a type of crystal system

Choose an answer

Triclinic

Monoclinic

Rhombohedral

Isotropical

2,5-dimethyl-1-hexene has

Choose an answer

Two sp2 hybridized carbons

Six sp2 hybrid carbons

Two double bonds

Four pi electrons

Hydrogen bonding is extensively present in proteins which form the spiral. The hydrogen bond being produced is between

Choose an answer

nitrogen and hydrogen atom

oxygen and hydrogen atom

carbon and hydrogen atom

oxygen and carbon atom

Which of the following is a non-crystalline solids pair

Choose an answer

Diamond, wood

Glass, table salt

Wood, glass

Sucrose, glass

The maximum possible number of hydrogen bonds in which a H₂O molecule can participate is:

Choose an answer

1

2

3

4

Naturally occurring isotopes of silver are

Choose an answer

,Two

, Four

, Forty seven

, sixteen

On the basis of intermolecular forces diamond is a

Choose an answer

ionic solid

covalent solid

metallic solid

molecular solid

Which of the following are more temperature senesitive

Choose an answer

Liquid crystals

Solid crystals

Ionic stals

None of above

In crystal of sodium chloride, a Cl-1 ion present at the corner of cube is shared between how many cubes?

Choose an answer

8

4

6

10

SN2-reactions can be usually observed in

Choose an answer

Primary alkylı halide

secondary alkyl halide

Tertiary alkyl halide

Both A. and B

The one atmospheric pressure of air in term of pound per square inches is

Choose an answer

101.325

1.01325

760

14.7

London forces are more affective at:

Choose an answer

high temperature

low temperature

low pressure

high pressure

Which state about gases is not correct?

Choose an answer

They spread throughout the vessel.

Pressure is due to collision.

There are larger spaces between the molecules.

Molecules are arranged regularly.

A crystal system in which all three angles and all three edges are different is called

Choose an answer

triclinic

rhombohedral

cubic

hexagonal

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

Choose an answer

6.02/22.4 x10²³

12.04/22.4 x10²³

18/22.4x 10²³

55.6x6.02x10²³

Li resembles with Mg, because

Choose an answer

the ratio of their charge to size is nearly the same

both have nearly same size

both are metallic in nature

both are found together in nature

All of the following have cleavage planes except:

Choose an answer

molecular crystals

metallic crystals

covanent crystals

ionic crystals

In homocyclic compounds the ring consists of

Choose an answer

Carbon and oxygen atoms

Carbon and nitrogen atoms

Only carbon atoms

Carbon atoms with one hetero atom

Which one of the following will react with bothethand and ethanoic acid at room temperature

Choose an answer

CaCO3

CuO

Na-metal

CH3OH

Acording to the kinetic theory of gases

Choose an answer

The pressure exerted by a gas is proportional to mean square velocity of the molecules

The pressure exerted by the gas is proportional to the root mean square velocity of the molecules

The root mean square velocity is inversely proportional to the temperature

The mean translational KE of the molecule is directly proportional to the absolute temperature

The alcohol that does not form curbonyl compound on oxidation

Choose an answer

iso-butyl alcohol

neo pentyl alcohol

Ethanol

ter-butyl alcohol

The electrolyte used in fuel cell is

Choose an answer

КOH

NaCl(aq)

NaNO3

Molten NaCl

Hardness of diamond is attributed to the

Choose an answer

strength of the ionic bonds in the structure

three-dimensional network of covalent bonds

absence of valence electrons in carbon atoms

In a period the atomic radii

Choose an answer

increase

decrease

remain same

first increase, then decreased

The amount of energy released when gaseous ions of opposite charges combine to give one mole of a crystalline ionic compound is called

Choose an answer

bond energy

heat of formation

lattice energy

ionization energy

Boyle's law does not fall even:

Choose an answer

Temperature is extremely high.

Pressure is extremely high.

Mixture of gases is taken.

All of above.

Addition of unsymmetrical reagent to an unsymmetrical alkene is governed by

Choose an answer

Cannizzaro's Reaction

Aldol Condensation

Kirchhoff Rule

Markownikov's Rule

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

Choose an answer

2 order

3 order

1st order

Zero order

The number of reacting molecules whose concentration change during reaction is called

Choose an answer

Activated molecule

Rate of reaction

Order of reaction

half-life

An element that is not an essential par of proteins is

Choose an answer

O

N

H

S

The formation of acetic anhydride from acetic acid follows the mechanism

Choose an answer

SN

AN

SE

AE

Plastics are amorphous solids and

Choose an answer

have sharp melting points

undergo clean cleavage when cut with knife

do not undergo clean cleavage

possess orderly arrangement over long distances

A gas is heated in such a way that its volume and absolute temperature both are doubled. the pressure of gas:

Choose an answer

Becomes 4 time

Becomes half

Becomes 2 time

Remains same

Which impurity makes the shape of NaCl crystal needle like

Choose an answer

MgSO4

urea

glucose

MgCO3

The basic distinction between solids, liquids and gases lies in difference between.

Choose an answer

Strength of the bonds

Size of molecules

space which the molecules occupy

All of above

The reaction which is zero order

Choose an answer

Decomposition ofN2O5

Formation of Glucose in plant

Formation of Fel2

Chorination of methane in sunlight

By increasing the concentration of reactants, the rate of reaction

Choose an answer

Decreases

Increases

Remains constant

Not predicted

The nature of the attractive force in acetone and chloroform are

Choose an answer

dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

instantaneous forces

In which of the following compounds hydrogen bonding is not present

Choose an answer

water

ethanol

ether

ammonia

Which one is best buffer those have

Choose an answer

pH = pKa

pH > pKa

pOH < pKb

pKa =0

Which attractive forces cause molecular solids to be formed?

Choose an answer

lonic

Metallic

Covalent

van der Waals

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

Choose an answer

Intermolecular repulsions

Intermolecular collisions per unit volume

Volume occupied by the molecules

Intermolecular attraction

At same temperature which substance has high kinetic energy:

Choose an answer

Liquid water

N₂gas in a container

Solid piece of iron

Solution of alcohol and water

Which thermometer will have its reading 273 degrees greater than that of thermometer C?

Choose an answer

A

B

B has 273 degrees greater than A

C has greater reading than all other thermometers

Which of the following is electrophile for alkylation?

Choose an answer

NO+2

SO3

R+

Both a & b

In Boyle's law which of the following pair is variable:

Choose an answer

Temperature and quantity of a gas.

Pressure and volume.

Volume and quantity of a gas.

Pressure and quantity of a gas.

Dipole-dipole interaction are present in the

Choose an answer

atoms of the He gas

molecules of CCl4

molecules of solid iodine

molecules of :NH3

Absolute temperature is the temperature at which

Choose an answer

All molecular motion ceases

volume becomes zero

Mass becomes zero

None of these

A certain buffer solution contains equal cone. of X- and HX. Ka for HX is 10(-8). The pH of buffer is

Choose an answer

3

11

8

14