Question # 1

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

Alcohols of low molecular weight are:

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Soluble in water

Insoluble in water

Soluble in water on heating

Insoluble in all solvents

Pressure remain constant at which temperature the volume of gas becomes twice of what it is at 0°C

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546 °C

546K

200°C

273K

pi-bond can be formed by sideways overlap of

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s-orbital

d-orbital

p-orbital

sp orbital

Which of the following molecules should be more volatile

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HF

HCl

HBr

HI

The boiling point of higher alkanes are greater than those of lower alkanes due to reason that

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higher alkanes have greater number of atoms

the polarizabilities of higher alkanes are greater

higher alkanes have greater hydrogen bonding

higher alkanes have zig-zag structures

Which one of the following will react with bothethand and ethanoic acid at room temperature

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CaCO3

CuO

Na-metal

CH3OH

Carboxylic acids reacts with sodium carbonate, & gas evolved in this reaction

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CO2

H2

CO

Both a &b

What is the co-ordination number of face centered cubic structure?

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12

8

6

10

In which of the following compounds H-binding is not present?

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ethanol

ether

water

ammonia

The most unsymmetrical one in crystal system is

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triclinic

Li, Na, K

monoclinic

hexagonal

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

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Hydrolysis

Oxidation

Reduction

Redox

The pressure exerted by gas molecules is due to their

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collisions

densities

masses

kinetic energy

Mg(s) + 2HCI(aq). ------------ MgCl2(aq)+ H2(g)

Given that; Mg=21g and HCI=21g, the excess reactant is

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Mg

HCI

Both are in stoichiometric amounts

None of these

The value of van der Waal s constant a for gases CO₂, N₂, and SO₂, are 3.59 ,1.39, 1.36, and 6.17 atm dm⁶ mol^-2respectively the gas which can be most easily liquefied is

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CO₂

O₂

N₂

SO₂

Octet rule is not allowed in the formation of

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NF3

B.CF4

CCI4

PCI5

In gasses and liquid, temperature is the measure of:

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Average transnational kinetic energies of molecules.

Average vibrational kinetic energies of molecules.

Average rotational kinetic energies of molecules.

None of above.

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

Ethyl alcohol reacts with PCL and produces:

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Haloalkane

Alkyl halide & H3PO3,

Alkyl halide & POCl3

Alkyl halides &H3PO4.

The maximum number of isomer for an alkene with the molecular formula C2H8

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2

3

4

5

The transition temperature of tin is

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95.5 C°

13.2 C°

13.2°C

128.5°

Which of the following does not give yellow precipitate with I2+ NaOH

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Acetone

Benzaldehyde

Acetildehyde

Acetophenone

The potential difference set up at 25 C and 1 atm when clectrode is dipped m Tis one molar ionic sohution is called

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Single electrode potential

electrode potential

Standard electrode potential

Standard hydrogen electrode

Which liquid is more volatile?

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water

mercury

benzene

honey

Dehydrohalogenation of alkyl halides happens in the presence of

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Pd

Ni

Zn

KOH/alcohol

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

Phenol is colourless, crystalline and solid

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Hygroscopie

Deliquescent

Moistening

Odourless

Plastics are amorphous solids and

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have sharp melting points

undergo clean cleavage when cut with knife

do not undergo clean cleavage

possess orderly arrangement over long distances

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

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

According to Lowery Bronsted concept, which of the following is considered as an acid?

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BF3

OH-

H3O+

Cl-

Butane has isomeric forms

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3

4

2

1

Low IE is a symbol of

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high electronegativity

small size

High electron affinity

Metallic character

Which of the following configurations corresponds to alkaline earth metals?

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[Ar] 3d10, 4s2

[Ne] 3d2, 3p2

[Ar] 4s2

[Ar], 3d10, 4s1

The addition of HCI to ethene gives?

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Chloroethane

1,2-dichloroethane

1.1-dichloroethane

2-chloroethane

Which one of the following molecules show maximum hydrogen bonding?

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H₂O

H₂Se

H₂S

HF

Which of the following is not heterocyclic compound?

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Naphthalene

Furan

Pyridine

Pyrrole

Which is an intermediate in SN1 reaction

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Ethoxide ion

Carbocation

alkyl halide

alkene

Covalent bonds are least likely to be formed:

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between atoms of the same element

between atoms of different elements on the right of the periodic table

by head of the group elements with high ionization energies

between an element in Group I and an element in Group Vll

Pyridine is an example af

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Homocyclic compound

Heterocyclic compound

Carbocyclic compound

Aliphatic compound

Which of the following pairs of not form a dative covalent bond to each other?

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NH₃ and H⁺

H₂O and H⁺

NH₃ and BF₃

CH₄ and AICI₃

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

Corrundam is ore of which element?

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Al

Th

In

Mg

Amorphous solids:

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have sharp melting point

undergo clean cleavage when cut with knife

have prefect arrangement of atoms

can possesses small regions of orderly arrangement

In esterification, the OH of carboxylic acid is replaced by

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OR+

R+

OR

R

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

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Yellow, Green

Red. Yellow

Blue. Green

Red. Blue

Which one of the following is NOT a nucleophile

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NH2+

BF3

H2O

CH3-

2-propanol on oxidation yield

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Propionaldehyde

Propanone

Propanal

Butanal

All of following acids have hydrogen bond in liquid state except:

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nitric acid

sulphuric acid

hydrochloric acid

hydrofluoric acid

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

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

SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode

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Zn has less reduction potential than hydrogen and Cu

Zn has high reductionl potential than hydrogen

and Cu

Zn is below electrochemical series than hydrogen and Cu

Zn has least tendency to lose electron

Atoms having same mass number but different atomic numbers are called.

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Isotopes

isobars

Isotones

isomers

By convention, the standard heat of formation of all elements is assumed to be

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Zero

positive

Negative

Infinity

Estyl butyrate has flavour like

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Banans

Jasmine

Pineapple

Orange

When calcium formate and calcium acetate are dry heated they form

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НCOOH

C2H5OH

CH3CHO

HCHO

Which of the following compounds is not known?

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SbCl

NCl3

Nl3

NCl5

The reaction takes place among the molecules when they have:

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Activation energy

Properly oriented

Concentrated

Activation energy and proper orientation

What will be the pH of 1.0 mol dm -3 of H2X, which is only 50% dissociated

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1

0

2

Less than 0

Triple point of water is

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273 K

373 K

203 K

193 K

Which of the following ketone will not give iodoform test

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Methyl isopropyl ketone

Dimethyl ketone

Ethyl isopropyl ketone

2-hexanone