Question # 1

The hexagonal closed packing is associated with

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Ag, Cu, Au

Zn, Cd, Hg

Li, Na, K

NaCl, KBr

The state of matter which exist only within a relatively narrow range of temperature and pressure

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Solid

Gas

Liquid

Plasma

If absolute temperature of a gas is doubled and pressure is reduced to one half, then the volume of the gas will

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remains unchanged

increases unchanged

reduces to 1/4

increases 4 times

Among the following molecules, which one has coordinate covalent (dative) bond?

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CCI4

CO2

CO

CH4

In a period the atomic radii

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increase

decrease

remain same

first increase, then decreased

Which of the following liquid has highest bolling point

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HCI

HBr

H2O

Br2

One kilo calorie is equal to

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4.184J

1000J

4184J

1kJ

The hydrocarbon with maximum B.P is

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CH4

C6H14

C4H10

C2H6

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

Which one of the following statements about sodium chloride is incorrect?

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it has a high melting point

it conducts electricity at room temperature

it is soluble in water

it is brittle

Lactoglobulin is found in

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nucleus

nerve cells

Plants only

muscles and in plants

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

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Esterification

Salt formation

Reaction with PCI5

Reaction with SOCI2

Ethanol reacts with sodium metal to liberate

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CO2 gas

CO gas

H2 gas

Steam

The reaction between Cu and conc. H2SO4 produces

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Cu+2

SO₂

SO₃

H₂

The polarizabilities of elements mostly increase down the group due to the reason that

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the atomic numbers increase

number of protons increase

number of shells increase along with increase of shielding effect

the behaviour of the elements remain the same

What forces operate between ethyl group of ethyl alcohol and oxygen of water

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H-bonding

attractive forces

repulsive forces

dipole forces

Which of the following may be called as London dispersion forces?

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instantaneous dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

dipole-dipole forces

Unit of the rate constant depends upon the

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Molecularity of reaction

Order of reaction

Concentration terms

Number of reactants

The arrangement ABC, ABC .... is referred as

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cubic close packing

octahedral close packing

hexagonal close packing

tetrahedral close packing

All of the following have cleavage planes except:

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molecular crystals

metallic crystals

covanent crystals

ionic crystals

Which one of the following is not true of metallic bonding?

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it gives rise to excellent electrical conductivity

electrons are following to move throughout the structure

the strength of metallic bonds increases down a group

the strength of metallic bonding affects the boiling point of metals

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

Velaric acid is obtained from a herb velarian, its IUPAC name is

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Propionic acid

Pentanoic acid

Butyric acid

Caporic acid

Which of the following ketone will not give iodoform test

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Methyl isopropyl ketone

Dimethyl ketone

Ethyl isopropyl ketone

2-hexanone

Low IE is a symbol of

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high electronegativity

small size

High electron affinity

Metallic character

Under which condition CO has the maximum molar volume

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high T and P

Low T and High p

high T and low P

Low T and low P

For a particular halogen, the reactivity of alkyl halides

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remains same with C-increase

decreases with C-increase

increases with C-increase

decreases with C-decrease

The ratio of volume to temperature on Kelvin scale is constant according to:

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Charle's law

Newton's law

Coulomb's law

Boyle's law

Which of the following is not a macromolecule?

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diamond

graphite

iodine

silica

Boiling point of water is higher (100°C) than that of ethanol (78.5°C) although both have hydrogen bonding. This is because

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water molecules are closely packed

water is more acidic than ethanol

ethanol is an organic liquid

number of hydrogen bonds are more in H₂O

Cholestryl benzoate tums into milky liquid at

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140°C

145°C

148C°

149°C

The forces of attraction between ions and water molecules are known as

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dipole-dipole forces

London forces

dipole- induced dipole forces

ion-dipole forces

Diffusion of different species is due to difference of

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potential energy

temperature

density

all the above

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

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Strength of the bonds

Size of molecules

space which the molecules occupy

All of above

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

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Carbon

Hydrogen

Nitrogen

Sulphur

The volume of an ideal gas is decreased to half, What will happen to the force exerted on the walls of the container by the gas particles?

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the force is halved

the force increases by a factor of 4

the force remains constant

the force increased by a factory of 2

chemist was able to measure the value of lattice energy of KCI to be 690 kj/mol.

From this experiment , he concluded that:

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lattice energy of KBr is 665 kj/mol and that of Ki is 630 kj/mol

lattice energy of KBr is 765 kj/mol and that of Kl 730 kj/mol

lattice energy of KBr is 730 kj/mol and that of Ki 765 kj/mol

lattice energy of KBr is 630 kj/mol and that of kL 665 KJ/mol

Which of the following is exact relationship between °F and C°

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°F= 5/9[°C-32]

°C = 5/9 [°F]+32

°F = 9/5°C+32

All

At constant volume, for a fixed number of moles of a gas the pressure of the gas increases with size of temperature due to

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increase in average molecular speed

increase in number of moles

increase in molecular attraction

decrease in the distance between the molecules

Esters have fruity smell and are used as artificial favours. Amyl acetate gives flavour of

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Banana

Jasmine

Pineapple

Orange

Plastics are amorphous solids and

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have sharp melting points

undergo clean cleavage when cut with knife

do not undergo clean cleavage

possess orderly arrangement over long distances

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

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Nitrogen

Sulphur

Arsenic

Chlorine

H-bonding is maximum in:

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ethanol

benzene

diethyl ether

water

lonic solids don't conduct the electrical current because

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ion do not have translatory motion

free electrons are less

the coordination number of the ion is very high

strong covalent bonds are present in their structure

Mass spectrometry is used to determine the

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Number of isotopes of an element

Relative abundance of isotopes

Relative isotopic masses

All of these

Enthalpy of a reaction can be measured by

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Glass calorimeter

Barometer

Manometer

Thermometer

The mono atomic gas molecules are ______ gas molecules

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Halogen

Zero

Noble

Both b and c

Among solids,the highet melting point is exhibited by

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Covalent solids

Ionic solids

Pseudo solids

Molecular solids

In which system hydrogen bonding is not present

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solution of ethanol in water

linking of helix in protein molecule

structure of ice

solution of NaCl in benzene

Elements of group IA and IIA are

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electronegative

neutral

electropositive

non-metals

The molar volume of CO₂ is maximum at:

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S.T.P. (0^∘C and 1 atm)

127^∘C and 1 atm

0^∘C and 2 atm

273^∘C 2atm

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

The solubility of A2B3 is X mole dm-3. Its Ksp is?

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6X(5)

36X(5)

64X(5)

108X(5)

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

At constant pressure, if the original volume is 546 cm³at which temperature the volume of gas 552 cm³

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1°C

2°C

3°C

4°C

Decomposition of H2O is

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Endothermic reaction

Nuclear reaction

Exothermic reaction

Zero nuclear reaction

The rate of diffusion of a gas is inversely proportional to:

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Density of a gas

Velocity of the gas

Viscosity of the gas

All of above

Anthracene contains number of fused benzene rings

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1

2

3

4

Which of the following solids does not have a covalent bond?

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Silica

Copper

Diamond

Graphite

Which of the following equation is for idea gas:

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PV = dRT

PR = nTP

PM = nRT

PV = nRT

H₂and O₂are enclosed in porous vessel. The effusion of these gases will take place like

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H₂effuses 4 times the rate of effusion of O₂

O₂effuses into air 4 times the effusion of H₂

both effuse at same rate

H₂effuses at 8 times the rate of effusion of O₂