Question # 1

Which of the following liquid has highest bolling point

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HCI

HBr

H2O

Br2

In the formation of NaCl crystals from its aqueous solution, its cubic shape is changed to needle like when 10% urea is present as impurity, this phenomenon is called as

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habit of crystal

polymorphism

anisotropy

cleavage

Zine does not show variable oxidation state, because

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Its d-subshell is incomplete

Its d-subshell is complete

It is relatively soft metal

It has two electrons in outermost shell

Dipole-induced dipole forces are also called

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dipole-dipole forces

ion-dipole forces

Debye forces

London-dispersion forces

4.4 g of CO₂ contains how many litres of CO₂ at STP?

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2.4 litre

2.24 litre

44 litre

22.4 litre

Super conductors are derived from compounds of

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P-block elements

Lanthanides

Actinides

Transition elements

The highest temperature at which gas can be liquefied and above which liquefaction is impossible is called

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Boiling temperature

Upper consulate temperature

Transition temperature

Critical temperature

250cm of 0.2 molar potassium sulphate solution is mixed with 250cm of 0.2 molar KCI solution. The molar concentration of K ions is:

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0.2 molar

0.25 molar

0.3 molar

0.35 molar

Gases of air, always remain in random motion and do not settle due to:

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Difference of molecules masses of air gases.

Difference in partial pressure of gas molecules.

Unequal number of different gas molecules.

Elastic collision of gas molecules.

The process in which solid is directly coverted into gaseous state is called

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evaporation

boiling

sublimation

transformation

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

Which of the following is a base according to lowery Bronsted concept?

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I-1

HCl

H3O+

NH4+1

Identify the compound, which give iodoform test

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Methanol

3- Hexanol

Methyl ketone

Propionaldehyde

One of the following can produce greater number of moles of ethyl chloride on reacting with escess of ethanol

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PCI5

PCI3

HCI/ZnCl2

SOCI2

Which one is very weak acid

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HF

HCI

H2CO3

H2O

Structure of CrO4(-2) is'

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triclinic

cubic

octahedral

tetrahedral

Benzene reacts with Ethyl chloride in presence of AICls to give

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Benzalchloride

Benzyl chloride

Ethyl benzene

Benzotrichloride

The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives

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Ethene

Alcohol

Diethyl ether

Carboxylic acid

Crystal can be classified in to ......basic crystal habits

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7

4

14

3

Which of the following pair has the same no. of electrons in d- subshell

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Sc+3,Ti+3

Mn+2,Fe+3

Ti+3,V+3

Cr+3.Co+2

which one of the following statements bout negative ions is incorrect?

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they are also know as anions

they are formed when atoms gain electrons

they are large than the atom from which they were formed

they are smaller than the atom from which they were formed

Which one is not postulated in the kinetci molecular theory among the following?

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molecules are in chaotic motion

molecules of all the gases have same size and same mass

the volume of the molecules is negligible

all molecular collisions are elastic

The nature of l₂crystals are

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Metallic

Covalent

Ionic

Molecular

The system in which all the three axes are unequal and are at righ angle to each other is called

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cubic

hexagonal

orthorhombic

tetragonal

Which one of following property is not true about alkali metals?

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Strongest bases due to their hydrides

Low ionization energy

Oxidation number more than +1

Form acidic oxides

Which of the following reactions does not involve formation of carbocation?

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SN1 and E1

El and E2

SN1 and SN2

E2 and SN2

The correct value of the gas constant R is close to

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0.082 litre-atm K^-1 mol^-1

0.082 litre-atm^-1 K mol

0.082 litre-atm K

0.082 litre-atm^-1 K mol^-1

Which of the following is an application of electrochemical series

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Prediction of the feasibility of chemical reaction

Calculation of the cell voltage

Prediction of reaction of metal with dilute acid

All of the above

The ionization energy

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generally increases from left to right in a period

increases from top to bottom in a group

does not change in a period

does not change in a group

Covalent solids are composed of

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Ions

Different molecules

Neutral atoms

Diethyl ether

ln ethyl alcohol, the bond that undergoes heterolytic cleavage most readily is

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C-C

C-O

C-H

O-H

Reactivity of carbonyl compounds is due to

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Electrophilic carbon

Less stearic hindrance

Unsaturation of Co

Polarity of bond

If a strip of Cu metal is placed in a solution of FeSO4

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Cu will be deposited

Cu and Fe both dissolve

Fe is precipitated out

No reaction take place

The relationship between density and molar mass of a gas is

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Directly proportional

^{Inversly proportional}

Straight line

Stoichiometric

An instrument which is used to measure the pressure of a gas is called:

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barometer

photometer

stalagmometer

viscometer

Elements of group IA and IIA are

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electronegative

neutral

electropositive

non-metals

Which of the following equations represents the 2nd ionization energy of Na?

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Na(g) ---> Na²⁺ (g) + 2e^-

Na(s) ---> Na²⁺ (g) + 2e^-

Na⁺(s) ---> Na²⁺ (g) + e^-

Na⁺(g) ---> Na²⁺ (g) + e^-

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

For a gas the isotherm is the graph between

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V and T

T and P

n and T

P and V

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

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

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dipole-dipole forces

ion dipole forces

instantaneous dipole-induced dipole forces

dipole-induced dipole forces

At same temperature which substance has high kinetic energy:

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Liquid water

N₂gas in a container

Solid piece of iron

Solution of alcohol and water

A semiconductor of Ge can be made p-type by adding

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Trivalent impurity

Tetravalent

Pentavalent impurity

Divalent impurity

Which pair of elements have bonds of the same type between their molecules in the solid state?

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phosphorous and nitrogen

sulphur and magnesium

carbon and sodium

hydrogen and sodium

A pressure of 1Nm^-2 is equal to:

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one bar

one pascal

stalagmometer

one aomosphere

The concentration of product is increasing from 30 mole/dm3 to 40mol/dm3 in 0.5 sec then rate of reaction will be------moledm-3sec-1

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0

20

15

25

Number of H+ ions when 0.1 mole of sulfuric acid is completely ionized in water

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4x6.022x10ê23

1×6.022x10ê23

2x6.022 x10ê23

2x6.022x10ê22

In nucleophilie substitution bimolecular reaction the order of reaction with respect to substrate

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2 order

3 order

1st order

Zero order

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

The most suitable temperature for preparing ammonia gas is

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250℃

450℃

350℃

550℃

Which of the following is not an electrophilic substitutional reaction of benzene?

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Free radical chlorination of benzene

Friedel Craft alkylation

Sulphonation

Nitration

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

The total number of lattice arrangements in different crystal system is

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7.0

3.0

8.0

14

Stronger the oxidizing agent, higher is

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Redox potential

Standard reduction potential

Reduction potential

_{Oxidation potemial}

All the Hydrolytic reactions are

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First order

Second order

Third order

pseudo-first order

For gases obeying Boyle's law, if pressure is quadrupled, the volume becomes

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Double

One half

One fourth

Remains constant

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

D-block elements are also called

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Non-typical transition element

Outer transition elements

Abnormal transition elements

Inner transition

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.

Which of the following is not a correct postulate of the kinetic theory of gases

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the gas molecules are in random motion

the collision between the molecules are perfectly elastic

the average kinetic energies of different gases are equal at a particular temperature

the pressure exerted on the walls of the container is due to intermolecular forces

The crystals formed due to London forces of interaction are

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ionic

covalent

molecular

metallic