Question # 1

Kerosene is liquid at room temperature.This is due to:

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organic nature

H-bonding

molecular size

dipole-dipole forces

In which of the following Equilibria will Kc and Kp have not the same value

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2HI <--------> H2+I2

2SO2 + O2 <--------> 2SO3

N2 + O2 <---------> 2NO

All of these

^{The common oxidation number of halogens is}

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-1

+1

-2

0

An element that is not an essential par of proteins is

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O

N

H

S

The total pressure exerted by a mixture of gases is the sum of the partial pressure of all the gases present is a statement of

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Charle's Law

Boyle's Law

Dalton's Law

Graham's Law

By the electrolysis of CuCl2 using inert electrodes of platinum which species is deposited at cathode

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H2

O2

Cu

CI

What is the formula of silica?

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Si2O3

SiO2

Si3O4

SiO-

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

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Yellow

Blue

Violet

Red

Which does not affect vapour pressure

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Nature of liquid

intermolecular forces

Temp

None of these

At different temperature, the vapour pressure of water is

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different

same

low

high

The ratio of most probable velocity to that of average velocity is

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π/2

2/π

√π/2

All gases liquefly before reaching at

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273°K

373°K

0 K

73°C

Propanoic acid is functional group isomer of

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Methyl acetate

Ethyl acetate

Propanal

Proparone

Abumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Simple Protein

Which of the following alcohols is least reactive with respect to 0-H bond

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CH3OH

CH-CH2-OH

(CH3)2-CH-OH

(CH3)3OH

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

Indicate the number of open chain isomers of C6H14

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4

5

6

7

Spectrometry method is applicable if a reactant or a product absorbs radiation

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Ultraviolet

Visible

Infrared

Any of these

Catalyst used for ammonia synthesis is

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Cu

Co

Zn

Fe

2,5-dimethyl-1-hexene has

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Two sp2 hybridized carbons

Six sp2 hybrid carbons

Two double bonds

Four pi electrons

Plasma was introduced by

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Crookes

Soddy

Faraday

Van der Waal

Which of the following is soluble in water?

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СН3ОН

CCL4

CHCI3

CS2

Zinc reacts with dilute acids to liberate hydrogen. This is because:

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Zn2+ ion is a powertul osidising agent than H' ion

H+ ion is a powerful oxidising agent than Zn ion

Zn2+ ion is a powerful reducing agent than H' ion

H+' ion is a powerful reducing agent than Zn- ian

The deviation of a gas from ideal behavior is maximum at:

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-10∘C and 5.0 atm

-10∘C and 2.0 atm

100∘C and 2.0 atm

0∘C and 2.0 atm

The weight of 11.2 liters of CO₂ at S.T.P would be

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88 g

44 g

32 g

22 g

Joule is a unit of energy which is defied as

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Kgm^-2s^-2

Kgm²s^-1

Kgms^-2

Kgm²s^-2

According to the kinetic theory of gases,in an ideal gas,between two successive collisions a gas molecule travels

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Ina circular path

In a wavy path

In a straight line path

With an accelerated velocity

Which is trigonal crystal

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CaSO₄. 2H²O

MgSO₄

NaNO₃

All

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

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HF

CO₂

CH₄

N₂

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

5604 cm3 of H2 gas at STP contains atoms of hydrogen

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6.02×10 (23)

2.6x10(22)

3.01x10(23)

1. 50x 10(23)

In Boyle's law which of the following pair remains constant:

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Temperature and quality of a gas.

Pressure and quality of a gas.

Temperature and pressure.

Temperature and quantity of a gas.

The relative rate of diffusion of a gas (molecular weight = 128) as compared to oxygen is

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2 times

1/4

1/8

1/2

In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains

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Double

Same

Half

Four times

Crystals can be classified into

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7 crystal systems

4 crystal systems

3 crystal systems

14 crystal systems

The heat of reaction depends upon

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Temperature of the reactants

Physical states of the reactants and the products

Both A) and B)

Path of the reaction and the temperature

When graph is plot between P and 1/V at constant temperature. A straight line obtains which move toward ______ when temperature increase

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Pressure axis

Volume axis

1/V axis

1/P axis

A system absorbs 100 kJ heat and performs 50 kJ work on the surroundings. The increase in internal energy of the system is

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50kJ

100 kJ

150kJ

5000 kJ

The hydrocarbon with maximum B.P is

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CH4

C6H14

C4H10

C2H6

Super conductors are derived from compounds of

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P-block elements

Lanthanides

Actinides

Transition elements

The hetero atom in py ridine is

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Oxygen

Nitrogen

Chlorine

Sulphur

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

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

The rate diffusion of H₂is 4 times than the of an unknown gas at same temperature and pressure, the molecular mass of unknown gas is

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32

16

4

64

The correct order of increasing attractive strength for weak intermolecular forces is....

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dipole-dipole interaction hydrogen bonding, van der Waals forces

van der waals forces dipole- dipole interaction, hydrogen bonding

hydrogen bonding, dipole-interaction, van der Waals forces

hydrogen bonding, van der Waals forces, dipole-dipole interaction

What does no happen when an ideal gas is heated?

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an increase in the average energy of the gas particles

an expansion in the range of kinetic energies possessed by particles

an increase in the number of molecules with lower energies

a drop in the number of molecules with lower energies

If Kc value is small then equilibrium position will shift

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Towards left

Remains unchanged

Towards right

lt is always constant value

The pH of ideal buffer is

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10

7

Less than 7

0

Which will not react with phenol

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NaOH

Br2

KMn04/OH-

Na

What will be the ratio of volume of equal masses of O₂, H₂and CH₄kept in same container under same conditions

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2 : 16 : 2

1 : 16 : 2

2 : 16 : 1

1 : 2 : 1

In order to maintain the boiling point of water at 110 C°, the extemal pressure should be

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550 torr

between 500 and 760 tor

between 760 and 1500 torr

any pressure can be maintained

When a compressed gas is allowed to expand into a region of low pressure, it produce:

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Vapours

Cooling effect

Heating effect

None of above

The B.P. of compound is mostly raised by

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dipole-induced dipole interactions

london dispersion forces

intramolecular H-bonding

intermolecular H-bonding

The molecules of air don't settle down. This is due to:

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non-polar nature of gases

different molar mass

elastic collisions of gas molecules

pressure of dust particles in air

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

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Silica

Copper

Diamond

Graphite

Total number of valence electrons in phosphonium ion (PH4-) is

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8

9

12

10

Moles of protons in 20g of SO3

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10

20

40

80

Which one of the following elements is not an alkali metal?

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Na

Sr

Cs

Rb

The relationship between density and molar mass of a gas is

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Directly proportional

^{Inversly proportional}

Straight line

Stoichiometric

Which if the following will have the same number of molecules at S.T.P?

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280cm³ of CO₂ and 280cm³ of N₂O

11.2dm³ of O₂and 32g of O₂

44g of CO₂and 11.2dm³ of CO

28g of N₂and 5.6dm³ of oxygen

Tertiary aleohols producewith acidified KMno,

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Ketones

Aldehydes

Malonic acid

Alkene