Question # 1

The solubility product of AgCl is
2.0 x 10(-10) mol2 dm(-6). The maximum concentration Ag+ ions in the solution is:

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1.41 × 10(-5) mol. dm(-3)

1.41 × 10(-10) mol. dm(-3)

2.0 × 10(-10) mol. dm(-3)

4.0 × 10(-20) mol. dm(-3)

In the presence of hot alkaline potassium permanganate solution 2-butene will give

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Formic acid +acetic acid

Two moles ethanoic acid

Two moles of methanoic acid

Ethylene glycol

The original volume of a gas at 0° is 273 cm³at constant pressure, its volume at 273°C becomes

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zero cm³

546 cm³

446 cm³

346 cm³

All are dicarboxylic acids except

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Oxalic acid

Malonic acid

Picric acid

Tartaric acid

The diffusion of gasses at absolute zero will be:

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Slightly decrease

unchanged

Slightly increased

Zero

The total K.E. of one mole of an ideal gas is given by:

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1/2 RT

3/2 RT

1/2 KT

3/2 KT

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

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multiples

equal

different

in fractions

Number of electrons involved in d-d transition of [Ti(H2O)6]+3

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1

3

2

4

Which of the following will undergo nucleophilic addition reaction more easily?

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Aldehyde

Alkene

Aldehyde and ketone equally

Neither aldehyde nor alkenes

In NaCl cyrstal Na⁺ion is surrounded by how many ions of Cl^-

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4

6

8

10

At higher temperature isotherm moves away from both the axes because of increase in

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Pressure

Volume

Number of moles

All

An ideal gas cannot be liquefied because

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Its critical temperature is always above 0°C

Its molecules are relatively small in size

It solidifies before becoming a liquid

Forces operative between its molecules are negligible.

Relationship between volume of a gas and prevailing conditions of temperature and pressure are called

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Gas laws

Equilibrium laws

Rate laws

None of these

The value of the vapour pressure of water at its boiling point at Karachi and Murree is

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same

different

depends upon the environmental conditions in both cities

greater at Murree and less at Karachi

The critical temperature of NH₃ is greater than CO₂ due to its:

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Greater polarity

Stable polarity

Lesser polarity

None of above

To cook the food at a high mountain is difficult as compared to at sea level. The reason is that:

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the temperature at the top of the mountain is low

the density of water decreases at the mountains

the boiling point of water decreases at the mountain

the hydrogen bonding in water changes with the change of height

A gas has non-ideal behaviour at:

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high temperature and high pressure

low temperature and low pressure

high temperature and low pressure

low temperature and low pressure

To which of the following mixtures Dalton's law of partial pressures is not applicable?

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CO and CO₂

CO₂ and N₂

CH₄ and C₂H₆

HCI and NH₃

Most reactive among the following

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Li

Mg

Ca

Na

To prepare ethane by Wurtz synthesis the suitable alkyl halide is

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Ethyl iodide

any alkyl iodide

Ethyl chloride

Methyl bromide

What is true about an alcohol and phenol

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Both are more acidic than water

Both react with NaOH

Both produce CO2 with Na2CO3

Both, produce H2 with Na

Which of the following gases have lowest density at room temperature

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CO

N₂

Ne

NH₃

H2O and HF are the hydrides of the second period. Fluorine is more electronegative than oxygen. Anyhow, the boiling point of water is greater than that of HF. This is due to:

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water is more polar than HF

water has a bent structure

HF has a zig zag structure after making hydrogen bonding

the number of hydrogen bonds produced by water are greater than that of HF

Change in enthalpy (∆H) of a system can be calculated by

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∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

Partial pressure of gases in a mixture depend upon:

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Number of moles

Number of protons

Number of electrons

Number of neutrons

Pressure of 1Nm^-2 is equal to

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One bar

1 psi

One pascal

One atmosphere

If the reaction "P+Q→R+S' is deseribed as being of zero order with respect to P, it means that

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P is catalyst in this reaction

P molecules do not possess sufficient energy to react

The concentration of P does not change during the reaction

The rate of reaction is independent of the concentration of P

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

Estyl butyrate has flavour like

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Banans

Jasmine

Pineapple

Orange

Phenol is completely soluble in water above

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25°C

62.3℃

68.5°C

66.50°c

The minimum temperature recorded by Kelvin scale is:

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273K

373K

Absolute scale is unable

0K to record this temperature

Primany aleohols sornally give us aldehyde when oxidized in the presence of acidified Na2Cr2O7, what will be the product, when the secondary alcohols are oxidized in same condition?

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Alkenes

Alkyl halide

Alkynes

Ketones

In dilatometric method is directly proportional to extent of reaction

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Change in concentration

Change in pressure

Chang in volume

Change in temperature

Total pressure of mixture of two gases is:

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The ratio of their partial pressure

The product of their partial pressure

The difference partial pressure

The sum of their partial pressure

If the energy of the activated complex lies close to energy of reactants, it means that reaction is

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Slow

Exothermic

Endothermic

Exothermic and fast

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

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Hydrolysis

Oxidation

Reduction

Redox

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

During the nitration of benzene the nitrating agent is

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NO3

NO2+

NO2-

HNO3

Which property of liquid is measured by polarimeter

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Conductance

Optical activity

Refractiye Indéx

Change in volume

Which of the following statements is not correct about galvanic cell?

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Anode is negatively charged

Cathode is positively charged

Reduction occurs at anode

Reduction occurs at cathode

Which one is best buffer those have

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pH = pKa

pH > pKa

pOH < pKb

pKa =0

Hydration of ethene is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

At constant temperature, volume of given mass of a gas is inversely proportional to pressure on it. This is statement of

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Charles law

Boyle's law

Hooks law

Grahams law

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

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101.325

1.01325

760

14.7

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

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LiBr

KCI

MgO

NaF

The conversion of molecules of A to B follows a second order kineties. Doubling the concentration of A will inerease the rate of formation of B by a factor of

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2

4

1/2

1/4

ΔH° represent the enthalpy change at

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0°C and 1 atm pressure

25°Cand 1atm

0K and I atm pressure

25°C and 2 atm pressure

Which of the following is soluble in water?

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СН3ОН

CCL4

CHCI3

CS2

The reaction which is zero order

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Decomposition ofN2O5

Formation of Glucose in plant

Formation of Fel2

Chorination of methane in sunlight

At room temperature, the vapour pressure of water and ether will be

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equal

different

zero

almost same

In which molecule. all atoms are coplanar?

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CH4

BF3

NH3

PH3

Substance that does not show the process of sublimation is

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K2Cr2O7

iodine

naphthalene

NH4CI

One dm3 of H2 and O2: has different masses but no. of particles are

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same

H2 has greater

different

O2 has greater

A molecule which contains two lone pairs and two bond pairs of electrons in valence shell of central atom, geometrical shape of molecules will be

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Tetrahedral

Trigonal pyramidal

Angular

Linear

Ar has low critical temperature and pressure due to its

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small size

monatomic molecule

low polarizability

liquefaction temperature close to room temperature

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

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Intermolecular repulsions

Intermolecular collisions per unit volume

Volume occupied by the molecules

Intermolecular attraction

For the purpose of interacts which one of the following arrangements represents the correct of increasing stability?

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covalent < hydrogen bonding < London forces < dipole-dipole

London forces < hydrogen bonding < dipole-dipole < covalent

London forces < dipole-dipole < hydrogen bonding < covalent

Dipole-dipole < London forces < hydrogen bonding < covalent

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

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H20

C6H6

H₂O₂

NaCl

When ethyl magnesium bromide is treated with carbon dioxide and the product hydrolyzed we get

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formic acid

propionic acid

oxalic acid

acetic acid

Which of the following compounds is not known?

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SbCl

NCl3

Nl3

NCl5

Matter having no definite shape and volume is called:

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gas

liquid

solid

plasma