Question # 1

No of unpaired electrons are maximum in

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V+3

Mn+2

Fe+3

Cr+3

lce occupies more space than liquid water

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9%

10%

11%

12%

Which impurity makes the shape of NaCl crystal needle like

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MgSO4

urea

glucose

MgCO3

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

The surface formed by the breakage of a crystal is called _____ plane

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Crystal

Unit

Cleavage

None

During space flights, astronauts ohlained water from

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Nickel cadmium cells

Lead accumulator

Fuel Cell

Alkaline battery

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

H3O+ can't accept a Ip because

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it has positive charge

The central atom is not electron deficient

The shell of oxygen has reached its limit

it already has a coordinate bond

Which of the following acid is unsaturated carboxylie acid

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Malonic acid

Oxalic acid

Succinic acid

Maleic acid

_{What is name of hydrated variety of quartz?}

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Rose quartz

Smokey quartz

Silica

Opal

The heat of hydrogenation of most of the alkene is about

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120 kJ/mol

100 kJ/mol

140 kJ/mol

105 kJ/mol

The standard reduction potential of Zinc is

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0.76V

0.34

-0.34V

-0.76V

The rate of diffusion of a gas of molar mass 72 as compared to H₂will be:

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Same

6 times

1.4 times

1/6 times

Point out the substance which has maximum vapour pressure at a given temperature?

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Acetone

Water

Ethanol

Acetic acid

Which of the following alcohol is more soluble in H2O

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Propanol

Butanol

Pentanol

Hexanol

Plasma was introduced by

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Crookes

Soddy

Faraday

Van der Waal

Estyl butyrate has flavour like

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Banans

Jasmine

Pineapple

Orange

If there are weak intermolecular forces in a liquid, it will be

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more volatile

less volatile

more dense

less heavy

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

NaCI has face centered cubic structure. The Na ion at the face of the unit cell is shared by

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2-unit cells

4-units cells

only one unit cell

8-unit cells

Which pair of following pair is metalloid?

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Antimony and bismuth

Phosphorous and arsenic

Nitrogen and phosphorous

Arsenic and antimony

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

The species which are produced by heterolytic bond breaking and can act as electron pair donor

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Free radicals

Cations

Nucleophiles

electrophile

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

The element which shows highest binding energy

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V

T

So

Cr

A basic buffer solution can be prepared by mixing

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Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Weak acid and its salt with strong base

An alkyl halide reacts with NH3 to give

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Amide

Cyanide

Amine

Aniline

K2SO4, and K2Cr2O4, are isomorphous solids and exist in

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cubic form

orthorhombic form

trigonal form

tetragonal

Which of the following is a non-crystalline solids pair

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Diamond, wood

Glass, table salt

Wood, glass

Sucrose, glass

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

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C-C

C-O

C-H

O-H

Which property of liquid is measured by polarimeter

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Conductance

Optical activity

Refractiye Indéx

Change in volume

Which of the following gives silver mirror with ammonicaT AgNO3

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Benzyl alcohol

Benzene

Benzoic acid

Benzaldehyde

which one of the following exhibits intermolecular hydrogen bonding?

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HF

HC

HBr

HI

When two ice cubes are pressed together they unite to form one cube. Which of the following forces is responsibles for holding them together

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Van der Waal's

covalent bonding

hydrogen bonding

dipole-dipole interaction

Change in enthalpy (∆H) of a system can be calculated by

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∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

The forces which are present between the ions and the water molecules are known as

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

London dispersion forces

London forces are

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stronger than dipole-dipole interactions

weaker than dipole-dipole interactions

equal to dipole-dipole interactions

sometimes stronger and sometimes weaker than dipole-dipole interactions

If the four tubes of a car are filled to the same pressure with N₂, O₂, H₂ and helium separately,then which one will be filled first.

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N₂

O₂

H₂

He

Which one of the following is not an alicyclic compound?

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Cyclohexene

Cyclohexane

Benzene

Cyclopentane

The ideal gas law holds best under the conditions of

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high pressure and high temperature

low pressure and high temperature

low pressure and low temperature

high pressure and low temperature

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

The strength of binding energy of transition elements depends upon

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Number of electron pairs

Number of unpaired electrons

Number of neutrons

Number of protons

Among the following, which one is nucleophile

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H+

Ca2+

OH-

Na+

Number of electrons involved in d-d transition of [Ti(H2O)6]+3

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1

3

2

4

Relative acidic strength of alcohol, phenol, water and carboxylie acid is

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Carboxylic acid > Alcohol > Phenol > Water

Carboxylic acid > Phenol > Water> Alcohol

Water > Alcohol> Phenol > Carboxylic acid

Phenol > Carboxylic acid > Alcohol> Water

Which compounds is alicyclic in nature?

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Cyclobutane

Iso-bstand

n-Butane

Toluend

At which oxidation state Cu achieves electronic configuration of Zn+2

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0

+2

+1

+3

The most suitable temperature for preparing ammonia gas is

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250℃

450℃

350℃

550℃

Which one of the following is not a form of chemical bonding?

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covalent bonding

hydrogen bonding

ionic bonding

metallic bonding

Dipole-dipole interaction are present in the

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atoms of the He gas

molecules of CCl4

molecules of solid iodine

molecules of :NH3

In the equation PV = nRT which one cannot be numerically equal to R

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8.31 x 10⁷ erg⁷ K^-1 mol^-1

8.31 x 10⁷ dynes Cm K^-1 mol^-1

8.31 JK^-1 mol^-1

8.31 L atm K^-1 mol^-1

pH of an aqueous solution is 3.0 at 25°C. The hydrogen ion concentration in the solution would be

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0.001

0.01

0.0001

10(-5)

Most reactive among the following

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Li

Mg

Ca

Na

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute

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Oxidation

reduction

Redox reaction

electrolysis

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

CH3CH2CH2OH--------A---------B Here B is

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Propyne

Propanal

Propene

Propane

Which of the following liquid has high vapour pressure?

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H₂O

ether

CH₃OH

C₂H₅OH

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

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