Question # 1

Oxidation of secondary alcohol produces

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Aldehyde

Ketone

Alkyl halide

Ester

Which one of the following elements is the strongest reducing agent?

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Chlorine

Sodium

Magnesium

Aluminium

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 smallest unit of a crystal that shows all the characteristic properties of its pattern is called

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cell

electrolyte

unit cell

crystal

2-propanol on Oxidation gives

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Aldehyde

Carboxylic Acid

Ketone

Alcohol

According to the general gas equation, density of an ideal gas depends upon

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Pressure

Temperature

Molar mass of the gas

All of the above

According to Hess's law, the enthalpy change for a reaction

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Depends on path

Independent of the path

The sum of ∆E and ∆H

None of these

Benzene has pi electron

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2

4

6

8

Which of the following reactions are usually slow?

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Neutralization of acids and bases

Displacement Reactions

Organic substitution reaction

Free radical reactions

Joule is a unit of energy which is defied as

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Kgm^-2s^-2

Kgm²s^-1

Kgms^-2

Kgm²s^-2

Which of the following are more temperature senesitive

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Liquid crystals

Solid crystals

Ionic stals

None of above

In the reaction A2 (g) + 4B2 (g) <-----------> 2AB4 (g) such that ∆H < 0, the formation of AB4(g) will be favoured at

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Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

High temperature and high pressure

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

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 Cl- ion present at the corner of the unit cell is NaCl crystal, contributes

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1/8 th

1/4 th

1/2 th

1

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

Tertiary alcohols have alpha bydrogens

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1

Zero

2

3

Liquid crystals are used for the early diagnosis of breast cancer by

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injecting liquid crystals

taking liquid crystals as diet

painting liquid crystals on the surface of breast

inhaling the smell of liquid crystals

Which element is expected to show the greatest tendency to form some covalent compounds?

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aluminium

calcium

magnesium

sodium

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

The boiling points of the halogens

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increases down the group

decreases down the group

remains constant

can not be predicted

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2-Propenol, on rearrangement, yields

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Propanal

Propanone

2-propano

Both A and B

The boding which covalent molecules containing hydrogen and one of the small electronegative element such as O, For Mis called:

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ionic bonding

bridge bonding

H-bonding

metalic bonding

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

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4

6

8

10

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

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Metallic Bond

Di sulfide bond

Peptide Bond

Carbon-Carbon double bond length in C3H6

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154 pm

134 pm

120 pm

105 pm

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

In metallic crystals the atomic orbitals combine to produce a large number of closely bands of energy according to

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electron pool theory

molecular orbital theory

valence bond theory

electrostatic force of attraction

Units of van der Waals constant a is

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atm dm⁶/mol² & Nm⁴/mol²

atm dm⁴/mol² & Nm⁴/mol²

atm dm⁴/mol² & Nm⁶/mol²

None of these

During combustion analysis, which one is used for absorbing carbon dioxide:

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50% KOH

5% KOH

Mg(ClO4)2

Silica gel

solubility of carboxylic acids decreases in water with increase in molar mass because

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Bigger molecules are more polar

bigger molecules have bigger non-polar groups

bigger molecules make more hydrogen bonds

bigger molecules can form lesser hydrogen bonds/molecule

London forces are more affective at

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low temperature

high temperature

low pressure

low temperature and high pressure

If temperature is 73K and volume is 146 cm3 then calculate the value of K=V/T

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5

4

3

2

At absolute zero the molecules of hydrogen gas will have

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Only translatioral motion

Only vibrational motion

Only rotational motion

All the motion are ceased

Which pair of gases do not obey Dalton's law of partial pressures?

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H2 and He

NH3and HCl

H2 and O2

N2 and O2

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 value of R is SI units is

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0.0821 dm³. atm. J^-1mole^-1

62.4 dm³torr K^-1mole^-1

8.31 dm³atm. K^-1mole^-1

8.31 JK^-1mole^-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)

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

The gases law describe the ______ Behaviour of gases

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Variable

Constant

Uniform

Best

Haemoglobin molecule is how many times heavier than helium atom

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68000 times

17000 times

,34000 times

, 1700 times

Which one among the following is not a good leaving group

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HSO4-

CI-

OH-

Br-

Which of the folowing compound is expected to be colored

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Na2SO4

ZnCl2

MgF₂

CuF₂

In the reaction A2 (g) + 4B2 (g) <-----------> 2AB4 (g) such that ∆H < 0, the formation of AB4(g) will be favoured at

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Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

High temperature and high pressure

Which pair gives same dehydrohalogenation product

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I-Chlorobutane, 2-Chlorobutane

I-Chloropropane, 2-Chloropropane

I-Bromopentane. 3-Bromopentane

iso-butvl chloride. 2°- butyl chloride

The major binding force of diamond,silicon and quartz is

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Electostatic force

Electical attraction

Ceobalent bond force

Non convalent bond force

If a gas expands at constant temperature

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The pressure decreases

The Kinetic energy of the molecules remains the same

The kinetic energy of the molecules decreases

The number of molecules of the gas increase

Which one of the following is NOT a nucleophile

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NH2+

BF3

H2O

CH3-

Elements of II-A group are called alkaline earth metals due to the reason that

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they occur in earth only

they form divalent cations only

they have ns2 electronic configuration

their oxides and hydroxides are alkaline in nature and metals are present in earth crust

Surface tension is measured by

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viscometer

barometer

stalagmometer

manometer

The temperature at which volume of ideal gas is hypothetically zero is called

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Absolute zero

0°C

OK

Both a and c

Which of the following successive ionization energies belong to a Group ll element?

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320,600,1110,1700,5650,

577,1820,2740,1160,14800,

428,3070,4600,5860,7990

736,1451,7740,10500,13600

A line parallel to x-axis is obtained when graph is drawn between

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Volume on abscissa & pressure on ordinate

Volume on abscissa & PV on ordinate at all conditions

Pressure on abscissa & PV on ordinate at constant temperature

None of these

Van der Waals equation explains the behaviour of

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Real gases

Mixture of gases

Ideal gas

Diatomic gases

In Case of elements the polymorphism is called

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Isotopic form

Allotropy

Isomorphism

Crystalline forms

Cholestryl benzoate tums into milky liquid at

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140°C

145°C

148C°

149°C

Variable Oxidation state of is related to transition elements

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empty d-subshells

Completely filled

Partially filled d-subshell

d-d transition

Substituted phenyl group are called

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Arene groups

Alkyl groups

Aryl groups

Acyl groups

Ti+3 shows minimum absorption (maximum transmittance) at-------and-------wavelength

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Yellow, Green

Red. Yellow

Blue. Green

Red. Blue

What is the formula of magnesite?

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PbS

MgSO4. 7H2O

MgCO3

CaCO3