Question # 1

An organic compound made from oxidation of ethanol is

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Formic acid

Acetic acid

Malonic acid

Citric acid

The gases H₂, O₂, H₂S and SO₂diffuse in the order

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SO₂>H₂S>H_2>O₂

H₂S>SO₂>O₂>H₂

O₂>SO₂>H₂>H₂S

H₂>O₂>H₂S>SO₂

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

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LiBr

KCI

MgO

NaF

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

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

Ethane nitrile can be converted into ethanoic acid through......intermediate

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Ethyl alcohol

AcetyI chloride

Acetamide

Methyl cyanide

Choose the example having hexagonal system:

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graphite

sugar

sulphur

diamond

Substituted phenyl group are called

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Arene groups

Alkyl groups

Aryl groups

Acyl groups

An alcohol is converted to an aldehyde with same number of carbon atoms as that of alcohol in the presence of K2Cr2O7/H2S04 the alcohol is

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CH3C(CH3)2OH

(CH3)3COH

CН3СН2СН2OH

(CH3)2CHOH

The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps.it is known as

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Henry's law

Hess's law

joule's law

Law of conservation of energy

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

When liquid solute is dissolved in liquid solvent, then the best unit of concentration is?

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% W/W

% W/V

% V/V

%V/W

Which of the following bonds is not present in NH4CL

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lonic bond

Covalent bond

Co-ordinate covalent bond

De-localized covalent bond

Which of the following molecules has angel of 120°

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BeCl2

BF3

CH4

NH3

To prepare ethane by Wurtz synthesis the suitable alkyl halide is

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Ethyl iodide

any alkyl iodide

Ethyl chloride

Methyl bromide

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

One molecule of gas is approximately Distance______ times its own diameter from its neighbour at room temperature.

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30

3000

3

300

Tertiary alcohols are the easiest to dehydrate because

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They form stable carbocation

They have less hydrogen

They have bigger size

They are polar

Which of the following is a reason why real gases do not behave as ideal gases do?

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real gases have intermolecular forces between the molecules

real gases do not have intermolecular forces between the molecules

real gases exist as molecules

molecules of real gases attract each other more strongly than molecules of ideal gases

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

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

According to Boyle's law, which parameters give a straight line parallel to x-axis, when we plot a graph between:

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V and T

P and V

P and 1/V

P and PV

The pH of ideal buffer is

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10

7

Less than 7

0

Mathematically, Boyle's law is indicated as:

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VT = K

PT = K

PV = K

None of these

What is the formula of silica?

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Si2O3

SiO2

Si3O4

SiO-

Which of the following is the unit for pressure of a gas in system international

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Nm^-2

mm of Hg

atmosphere

torrr

If the concentration of salt is greater than the acid in buffer solution, then the

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pH = pKa

pH = pKb

pH > pKa

pH < pKb

If 1 mole of an ideal gas is heated from 273.15 K to 283.15 K at 1 atmospheric pressure, then increase in its energy is

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0.082 atm.dm³

0.821 atm.dm³

8.21 atm.dm³

40.6 kJ

Name the compound, which shows geometric isomerism

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I-bromo-2-chloropropene

2.3-dimethy lpropene

2-pentene

Both A & B

Which alcohol is most reactive towards sodium metal?

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Ter Butyl alcohol

n-Propyl alcolol

Isopropyl alcohol

Have same reactivity

Furan is a compound

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Acyclic

Alicyclic

Heterocyclic

non-aromatic

What is true for a molecule with standard geometry

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It lacks a Ip

It can't be a donor

It can be an acceptor

All

The rate of E1 reaction depends upon

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The concentration of substrate

The concentration of substrate as well as nucleophile

The concentration Nucleophilic

Nature of Catalyst

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

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Sr

Bа

Be

Na

The destiny of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to:

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Viscosity

Molar mass

Momentum

All of above

Naturally occurring isotopes of silver are

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,Two

, Four

, Forty seven

, sixteen

Which compound is obtained hy the elimination reaction on bromoethane?

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Butene

Ethene

Propene

Propane

Which of the following gives positive haloform test and positive Fehling solution

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Acetone

Echanol

Acetaldehyde

Formaldehyde

Which of these has at least one d electron

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Sc+3

Mn+7

Ti+4

Cr+3

A doubly bonded carbon is

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cannot be sp2 hybridized

can be sp hybridized

can attach with three carbons

can attach with three hydrogens

Phenol is completely soluble in water above

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25°C

62.3℃

68.5°C

66.50°c

What is the formula of cryolite?

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Al2O3.2H2O

Na2B4O7 .10 H2O

Na3AIF6

Ca2B6O11. 5H2O

Ethane when completely halogenated in excess of chiorine can form

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Hexachloroethane

Dichloroethane

Pentachloroethane

1.1.2.2-terachloroethane

The addition of HCI to ethene gives?

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Chloroethane

1,2-dichloroethane

1.1-dichloroethane

2-chloroethane

Equal masses of methane and oxygen are mixed in an empty container at 25∘C.

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1/3

8/9

1/9

16/17

The distribution of energies among the molecules of gases was studied by:

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Maxwell

Coulomb

Newton

Boltzmann

Which one of the following has zero dipole moment

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NH3

CHCI3

H2O

BF3

Glyoxal molecule has?

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two carbonyl groups

One aldehydic and one carbonyl group

Two aldehydic groups

Two carboxyl group

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

An alkyl halide reacts with NH3 to give

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Amide

Cyanide

Amine

Aniline

Which of the following molecules have a permanent dipole

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CH₄

CHCl₃

CCl₄

CO₂

C=O and C=C bonds are differentiated by

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Hybridization of C-atom

Bond angles

Ammonical AgNO3

Conc. HNO3

The maximum oxidation state of Mn is

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+6

+7

+5

+4

The acidity of phenol is due to its

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Nature of Benzene

Double bond in benzene ring

Natute of phenoxide ion

Hydroxyl group

The attracted forces which are created due to repulsion of electronic cloud of the molecules are:

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ion-dipole forces

dipole-dipole forces

dipoles-induced dipole forces

instantaneous dipole-induced dipole

Charle's law only obeys when temperature takes in ______ scale

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Celsius

Fahrenheit

Kelvin

Rickey

Which one of the following groups is indicated when HCI is formed by reaction of ethanol with phosphorous pentachloride?

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Amino group

Halide group

Hydroxyl group

Hydride group

An example of simple protein is

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lipoprotein

Cholesterol

lecithin

globulin

Active sulphonating agent during sulphonation of benzene is

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SO2

SO3

SO3H

SO3+

^{The common oxidation number of halogens is}

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-1

+1

-2

0

Consider gas is measure in bars then the units of rate of reaction is

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Mole dm-3 sec

Bars sec

Mole dm-3 sec-1

Bars sec-1