Question # 1

Which reagent is responsible for the conversion of ketone to secondar alcohul

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NaAlH

NaBH4

Al

Red P

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

By increasing pressure two times and decreasing temp. two times the volume of gas

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Volume increases 4 times

Volume decreases 4 times

Volume increases 2 times

Volume decreases 2 times

Which pair of gases do not obey Dalton's law of partial pressures?

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H2 and He

NH3and HCl

H2 and O2

N2 and O2

The units of ionic product of H2O is

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Mole dm-3

Mole2 dm-6

Mole-1 dm-3

Mole-2 dm-6

The order of reaction provides valuable information about of reaction

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Condition

Concentration

Mechanism

Parameters

Point out that which is not an application of liquid crystals?

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Source of energy

In display of electrical devices

For skin thermography

As temperature sensor

The amount of energy released when gaseous ions of opposite charges combine to give one mole of a crystalline ionic compound is called

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bond energy

heat of formation

lattice energy

ionization energy

The type of isomerism shown by alkyl halides is

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geometric

functional

positional

metamerism

Cyclobutane structure is categorized under

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Aromatic compounds

Aliphatic compounds

Alicyclic compounds

Heterocyclic compounds

How many electrons have to be removed to ionize 1.0 x 10(-6) moles of Ne atoms to Ne+ ions in a neon advertising tube:

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6.02x10ê23/1.0x10ê-6

1.0x 10ê-6 x 6.02x 10ê23

1.0x10ê-6 x 6.02×10ê23/20.2

1.0x10ê-6 x 6.02x10ê23/9.65x10ê-1

If absolute temperature of a gas is doubled and pressure is reduced to one half, then the volume of the gas will

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remains unchanged

increases unchanged

reduces to 1/4

increases 4 times

Name the compound, which shows geometric isomerism

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I-bromo-2-chloropropene

2.3-dimethy lpropene

2-pentene

Both A & B

Cholestryl benzoate tums into milky liquid at

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140°C

145°C

148C°

149°C

Catalyst used for ammonia synthesis is

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Cu

Co

Zn

Fe

An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is

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СН3СOOH

HCOOH

CI2CHCOOH

Сl3CCOOH

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

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Yellow

Blue

Violet

Red

Which of the following solids has a simple molecular lattice?

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magnesium oxide

sodium

silicon(IV) oxide

sulphur

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

Which forms metallic cyrstals

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Cu

NaCl

Diamond

None

Dipole-dipole forces are present between:

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non-polar molecules

polar molecules

both polar and non-polar

none pf above

The study of which one of the followings guides to the mechanism of the reaction

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Order of reaction

Rate of reaction

Half-life period of reaction

Rate determining step

Honey contains glucose and fructose along with some other ingredients. It has greater viscosity due to:

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irregular shape of the molecules

greater molecular size and strong intermolecular forces

H-bonding

irregular shape of the molecules

Which of the following statements about amorphous solids is incorrect?

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They melt over a range of temperature

They are anisotropic

There is no orderly arrangement of particles

They are rigid and icompressible

Which one of the following is an aromatic compound?

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Benzene

Thiophene

Furan

All of them

Transition compounds which occur as tripositive ions have no

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4s-electron

3p-electron

3s-electron

2s-electron

Critical temperature for a gas depends upon

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Shape of molecule

Size of molecules

Inter molecular forces

All of these

In order to mention boiling point of water at 110∘C the external pressure should be:-

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between 760 torar an 1200 torr

between 200 torr and 760 torr

765 torr

any value of preessure

If volume of an ideal gas at 0C° 536cm3, what is volume at 1°C

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373 cm3

646 cm3

Becomes 0cm3

746 cm3

Furan is a compound

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Acyclic

Alicyclic

Heterocyclic

non-aromatic

Dipole-induced dipole forces are also called

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dipole-dipole forces

ion-dipole forces

Debye forces

London-dispersion forces

Evaporation of liquid takes place at every temperature. What when temperature becomes constant?

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the rate of condensation is greater than teh rate of condensation

it depends upon the nature of the liquid

rate of evaporation is greater than the rate of condensation

the rate of condensation and evaporation become equal

Which of the following equation is for idea gas:

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PV = dRT

PR = nTP

PM = nRT

PV = nRT

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

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

Octet rule is not allowed in the formation of

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NF3

B.CF4

CCI4

PCI5

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

A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

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Aceton3

Dimethyi ether

Acetic acid

Acetaldehyde

Which one of the following statements about sodium chloride is incorrect?

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it has a high melting point

it conducts electricity at room temperature

it is soluble in water

it is brittle

Which statement explains why the boiling point of methane is higher than that of neon?

[A_r:H.1:c,12:Ne,20]

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A molecule of methane has a greater mass than a molecule of neon

Molecules of methane form hydrogen bonds but those of neon do not

Molecule of methane have strongel intermolecular forces than those of neon

The molecule of methane is polar, but that of neon is not

Equal volumes of ideal gases contain equal number of molecules at:

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Same temperature

Same pressure

Same environmental conditions

Both (A) and (B)

How many isotopes are present in palladium

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Two

Four

Six

nine

An excess af silver nitrate is added to the aqueous barium chloride and the precipitate is removed by filtration. What are the main ions in the filtrate?

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Ag+ and NO3-, only

NO3- and Ba+2 only

Ag+ and NO-3, and Ba+2 only

CI- and NO-3, and Ba+2 only

Which one the following gases is ideal at -200°C?

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N₂

He

both

none

Velaric acid is obtained from a herb velarian, its IUPAC name is

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Propionic acid

Pentanoic acid

Butyric acid

Caporic acid

The nature of the attractive force in acetone and chloroform are

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

instantaneous forces

When purely alcoholic solution of sodium/potassiumhydroxide and halogenoalkanes are reacted an alkene is formed, what is the mechanism of reaction?

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Elimination

Debromination

Dehydration

Reduction

Temperature at which molecular motion ceases is called

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Absolute zero

Absolute temperature

Critical temperature

Difficult to predict

Density of H₂gas at 0°C is 0.09 under 1 atmospheric pressure. The density of O₂gas under the same conditions of temperature and pressure is

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0.36

1.00

1.44

1.18

Metals are good conductor of electricity, but their conductivity decreases by increase in temperature because

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electrons attracted strongly by the nuclei which resists their free motion

atoms form ionic bond and no free electrons

electrons go to the iocalized orbital not free

positive metal ions begin to oscillate and their motion hinders the free movement of electrons

TiCl4 is used as catalyst for manufacture of

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Sulphuric acid

Plastics

Ethanol

Tetraethyl lead

lonization of KCIO3. is suppressed by

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Increasing temperatuse

adding KCl

adding NaNO3

Decreasing temperature

Which alkaline earth metal makes peroxide?

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Ba

Be

Mg

Ca

Based on the physico-chemical properties, proteins may be classified into the following types

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Simple proteins

Compound proteins

Derived proteins

All of the above

Which is an intermediate in SN1 reaction

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Ethoxide ion

Carbocation

alkyl halide

alkene

solubility of carboxylic acids decreases in water with increase in molar mass because

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Bigger molecules are more polar

bigger molecules have bigger non-polar groups

bigger molecules make more hydrogen bonds

bigger molecules can form lesser hydrogen bonds/molecule

All the metal shine when they are freshly cut The reason is

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the conductivity of the metal is increased

the process of cutting gives energy to the metal atoms

the electrons become less delocalized according to valance bond theory

the electrons are excited at higher energy levels and emit the photons when they fall back

Charles s law is only satisfied if temperature is taken on

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Kelvin scale (b)

Celsius scale (°C)

Fahrenheit scale (°F)

All of these

The elements of group I-A react violently with water and make the solution

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neutral

amphoteric

acidic

alkaline

A compound X has all of the properties below. It is a liquid at 25°C it mixes completely with water it reaets with aqueous sodium hydroxide, What could X be?

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_{Ethanoic acid}

Ethene

Ethanol

Ethyl ethanoate

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