Question # 1

^{The common oxidation number of halogens is}

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-1

+1

-2

0

An example of ion-dipole force is solution of

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NaCl in water

Glucose in water

Bromine in benzene

Ethanol in water

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

The red brown ppt. of Fehling solution and benedict solution tests are of

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Ag

Cu2O

CuO

AgBr

A molecule that has polar bonds but is overall non - polar

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IF

CCl4

PCI3

All

One of the following does not give the flame test. Which is that

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Sr

Bа

Be

Na

One of the following can produce greater number of moles of ethyl chloride on reacting with escess of ethanol

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PCI5

PCI3

HCI/ZnCl2

SOCI2

Bond will be covalent when electronegativity difference of bonded atom is

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Equal to 1.7

between 0.5 to l.7

Greater to 1.7

zero

Greater shielding effect corresponds to ionization potential value

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greater

lesser

remain same

no effect

The highest melting point is observed by

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Butanoic acid

Propanoic acid

Pentanoie acid

HCI

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 kinetic energy of three moles of gas is:

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3/2 RT

3 RT

1/2 RT

2 RT

The volume of 2.8 g of carbon monoxide at 27°C and 0.821 atm pressure is (R = 0.0821 lit.atm.Mol^-1 K^-1)

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30 L

3 L

0.3 L

1.5 L

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

Hydrogen has a = 0.245 atm. dm³. mole^-2and b = 0.0266 dm³. mole^-1SO₂gas has a = 6.170 atm. dm³mole^-2and b = 0.0564 dm³mole where a and b are Van der Waal's constant

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H₂gas deviates more from ideal behaviour tha SO₂

SO₂gas deviates more form ideal behaviour than H₂

both deviate from ideal behaviour equality

both are ideal gases

Which one increases by common ion effect except?

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Crystallization

Solubility

Association of ions

All of these

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

When water freezes at 0°C, its density decreases due to

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cubic structure of ice

empty spaces present in the structure of ice

change of bond lengths

change of bond angles

In which one of the following does the central atom not possess an 'octet' in its outer shell?

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BH₃

CH₄

NH₃

H₂O

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

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 pressure

Low T and low P

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

covalent network of crystals has:

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lower melting point than molecular crystals

higher melting point than molecular crystals

H-bonding

Among solids,the highet melting point is exhibited by

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Covalent solids

Ionic solids

Pseudo solids

Molecular solids

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

The law of distribution of energy is given by

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Clausius

Maxwell

Bernoulli

Boltzmann

The solubility of Fe(OH)3 is 'x' mole per dm3. Its Ksp would be

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9X3

3X4

27X4

9X4

The reaction between Cu and conc. H2SO4 produces

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Cu+2

SO₂

SO₃

H₂

At compromise distance the forces dominating between atoms are

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repulsive forces

attractive forces

Dipole induced dipole force

H-bonding

If Cl2 is passed through hot NaOH. NaCIO3 is formed and the oxidation number of CI changes from

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-1 to 0

0 to +5

0 to-1

0 to +1

The Sl mechanism for the hydrolysis of an alkyl halide to an alcohol involves the formation of

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Carbocation

Carbanion

Pentavalent carbon in the transition state

Free radical

Highest oxidation state af the transition elements is

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+8

+7

+5

+1

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

Which of the following acid is unsaturated carboxylie acid

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Malonic acid

Oxalic acid

Succinic acid

Maleic acid

An excess af silver nitrate is added to the aqueous barium chloride and the precipitate is removed by filtration. What are the main ions in the filtrate?

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Ag+ and NO3-, only

NO3- and Ba+2 only

Ag+ and NO-3, and Ba+2 only

CI- and NO-3, and Ba+2 only

For gas obeying Boyle's law if pressure is double, the volume becomes:

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Remains constant.

Double.

One half.

None of above.

The crystal system which has all cell angles equal, but not 90°and less than 120° , the system is

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orthorhombic

monoclinic

hexagonal

rhombohedral

The reaction that generates an ionic bond is

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Halogenation of ethene

polymerization of ethene

Hydrogenation of ethyne

Reaction of ethyne withs sodamide

Methyl cyanide, on boiling with mineral acids yield

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Acetic acid

Formic acid

Propanoie acid

Butanoic acid

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

If a strip of Cu metal is placed in a solution of FeSO4

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Cu will be deposited

Cu and Fe both dissolve

Fe is precipitated out

No reaction take place

NH₃can form only one hydrogen bond per molecule though it has three partially positively charged hydrogens

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nitrogen in NH₃has only one ions pair of electrons which can make one H-bond

ammonia is a base

ammonia is a weak acid

it ionizes to give one H⁺

An ideal gas expands according to PV=constant. On expansion, the temperature of gas

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will rise

will drop

cannot be determined because the exteral pressure is not known

will remain same

A mixture of H₂, H2 and CH₄has total number of 0.51 mole and total pressure of 1 atmosphere. If the mass of H₂is 0.8 gram, then its partial pressure is

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0.4 atm

0.6 atm

0.776 atm

0.667 atm

Which of the following tends to approach ideal gas like behavior at R.T.P

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ammonia

neon

carbon dioxide

chlorine

Which af the following compound reacts slower than benzene in the electrophilic substitution.

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Phenol

Nitrobenzene

Toluene

Aniline

The reaction kinetics concerned with the

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Rate of reaction

Direction of reaction

Factor effecting rate of reaction

both a &b

Which of the following metal oxides is antiferromanetic in nature?

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MnO₂

TiO₂

NO₂

CrO₂

The sole produets of combustion analysis are

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CO2 and NH3

H2O and Mg(CIO4)2

CO2 and KOH

CO2 and H2O

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

Honey contains glucose and fructose along with some other ingredients. It has greater viscosity due to:

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irregular shape of the molecules

greater molecular size and strong intermolecular forces

H-bonding

irregular shape of the molecules

Lattice energy is also termed as

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ionization

crystal energy

dissociation

bond energy

The volume of given mass of gas is directly proportional to absolute temperature when pressure is kept constant this is called

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Boyle's law

Charles's law

Graham's law

Dalton's law

The temperature below which a gas does not exist is called its

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Inversion temperature

Critical temperature

Neutral temperature

Curie point

If rate of diffusion of A is 5 times that of B,what will be the density ratio of A and B?

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1/25

1/5

25

5

An organic compound made from oxidation of ethanol is

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Formic acid

Acetic acid

Malonic acid

Citric acid

Molten lead and iead (II) bromide both conduct electricity. Which one of the following statements relating to this is true?

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Both undergo chemical change when they conduct

Both conduct by the movement of charge particles

Both will also conduct in the solid state

Both contain mobile electrons

Acetone and chloroform are soluble in each other due to:

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intermolecular hydrogen bonding

dipole-dipole interaction

instantaneous dipoles

all of the above

The substitution of a'-H' by '-NO2' group in benzene is called

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Nitration

Sulphonation

Ammunolusis

Reduction of benzene

The Kw. of water at 25 C° is given by

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10(-7)

10(-10)

10(-12)

10(-14)

Which one of the followings has polar covalent bonds hut is overall nom-polar molecule:

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HF

CO₂

CH₄

N₂