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CHEMISTRY CODE:-04
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KL-14/Chem Series-A
m»r

Q.l: In a zero-order reaction for every 10° rise of temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate ofthe reaction will become

64 times 128 times


256 times 512 times


Q.2: Based on the fIrst law ofthermodynamics, which one ofthe following is correct?

For an isothermal process, q


For an isochoric process,


For an adiabatic process,


For a cyclic process, q


Q.3: The temperature of the system decreases in an

Adiabatic compression Isothermal expansion


Isothermal compression Adiabatic expansion


Q.4: Thestandard emfofgalvaniccellinvolving3moles ofelectronsinitsredoxreactionis
0.59 V. The equilibrium constant for the reaction ofthe cell is

1015 (D)1030
Q.5: In which ofthe following process, a maximum increase in entropy is observed?

dissolution of salt in water condensation ofwater


sublimation ofnaphthalene melting of ice


Q.6: In a reaction, A B Product, rate is doubled when the concentration ofB is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants and are doubled, rate law for the reaction can be written as

Rate (B)Rate


Rate (D)Rate


Q.7: The enthalpy of fusion ofwater is 1.435 kcal/mol. The molar entropy change for the
Q.8: The activation energy ofa reaction at a given temperature is found to be 2.303 RT J mor
Melting of ice at O°C is
5.260 call(mol (B)0.526 call(mol
10.52 call(mol 21.04 cal/(mol
l

.
The ratio of rate constant to the Arrhenius factor is

0.1 0.01


0.001 0.02


Q.9: Which of the following is correct for lyophilic sols?

They are irreversible


They are formed by inorganic substances


They are readily coagulated by addition of electrolytes


They are self-stabilized


KL14/Chem Series-A
Q.I0: The time taken for 10% completion of a first order reaction is 20 min. Then, for 19%
completion, the reaction will take
(A)40mins mins
mins mins

Q.ll: Dissolving 120 g ofurea (mol. wt. 60) in 1000 g of water gave a solution ofdensity 1.15 g/mL. The molarity of the solution is

1.78 M 2.00 M


2.05 M 2.22 M


Q.12: The potential ofa hydrogen electrode at pH lOis
0.59 V (B)O.OO V
V (D)-O.059 V

Q.13: Saturated solution ofKN03 is used to make 'salt bridge' because

Velocity ofK+ is greater than that ofN03­


Velocity ofN03-is greater than that ofK+


Velocity ofboth and N03-are nearly the same


KN03 is highly soluble in water


Q.14: Li occupies higher position in the electrochemical series ofmetals as compared to Cu because

the standard reduction potential of Li+/Li is lower than that ofCu2+/Cu


the standard reduction potential of Cu2+ICu is lower than that of Li+/Li


the standard oxidation potential of Li/Li+ is higher than that of Cu/Cu2+


Li is smaller in size as compared to Cu


Q.15: Corrosion ofiron is an electrochemical phenomenon where the cell reaction is

Fe is oxidised to Fe2+and dissolved oxygen in water is reduced to


Fe is oxidised to Fe3+and H20 is reduced to OK


Fe is oxidised to Fe2+and H20 is reduced to OK


Fe is oxidised to Fe2+and H20 is reduced to O2


Q.16: Several blocks of magnesium are fixed to the bottom ofa ship to

Prevent action ofwater and salt


Keep away the sharks


Prevent puncturing by under-sea rocks


Make the ship lighter


Q.17: If 60% of a first order reaction was completed in 60 minutes, 50% ofthe same reaction would be completed in approximately

45 minutes 60 minutes


40 minutes 50 minutes


Q.18: Which ofthe following electrolytic solutions has the least specific conductance?
0.02 N 0.2 N
(D)0.002N
KL14/Chem Series-A
Q.19: A solution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows

Negative deviation from Raoult's law


Positive deviation from Raoult's law


No deviation from Raoult's law


Positive or negative deviation from Raoult's law depending upon the composition


Q.20: Which one of the following statement is incorrect about enzyme catalysis?

Enzymes are denaturated by ultraviolet rays and at high temperature


Enzymes are least reactive at optimum temperature


Enzymes are mostly proteinous in nature


Enzyme acts at specific site


Q.2l: A solution ofurea is isotonic with

0.05 M solution of Glucose


solution ofGlucose


25% solution of Glucose


1 M solution ofglucose


Q.22: Which one of the following is an example for homogenous catalysis?

Hydrogenation ofoil


Manufacture ofammonia by Haber's process


Manufacture of sulphuric acid by Contact process


Hydrolysis of sucrose in presence ofdilute hydrochloric acid


Q.23: Gold numbers ofprotective colloids C and Dare 0.50,0.01,0.10 and 0,005 respectively. The correct order of their protective powers is

B D A C D A C B


C B D A A C B D


Q.24: Alum helps in purifying water by

Coagulating the mud particles


Sulphate part which combines with dirt and removes it


Forming Si complex with clay particles


Making mud water soluble


Q.25: The most probable velocity of a gas molecule at 298 K is 300 mls. Its RMS velocity is

42Oms-1 245ms-1


402ms-1 367ms-1


Q.26: If a gas expands at constant temperature, it indicates that

Number of the molecules of gas increases


Kinetic energy of molecules decreases


Pressure of the gas increases


Kinetic energy of molecules remains the same


KL14/Chem Series-A
Q.27: For one mole ofan ideal gas, increasing the temperature from IODC to 20DC

Increases the rms velocity by times


Increases the average kinetic energy by two times.


Increases both the average kinetic energy and rms velocity


Increases the rms velocity by two times.


Q.28: Temperature below which, the gas does not obey ideal gas laws is called

Boyle's temperature Inversion temperature


Reduced temperature Critical temperature


Q.29: In UV absorption spectroscopy, which ofthe following statements are true?

transitions are lower in energy than transitions


A conjugated systems of double bonds in a molecule shifts the a absorption maxima to higher wavelengths


transitions are lower in energy than transitions


A conjugated systems ofdouble bonds in a molecule shifts the a absorption maxima to lower wavelengths


Q.30: Hydrogen diffuses six times faster than gas a. The molar mass ofgas A is:

24 36


72 96


Q.31: Why do fluorescence spectrometers often use double-beam optics?

So that a reference solution can be used


To compensate for beam attenuation by the monochromator


To compensate for power fluctuations in the radiation source


All ofthe above


Q.32: In order to increase the volume ofa gas by the pressure of the gas should be

increased by 10% increased by


decreased by 10% decreased by


Q.33: Select the true statement about fluorescence spectroscopy of molecules in the UV-visible regIOn

Emission usually occurs at energies that are greater than the energies of excitation


Emission usually occurs at energies that are less than the energies ofexcitation


Emission usually occurs at energies that are equal to the energies of excitation. (D)Absorption usually occurs at energies that are less than the energies ofexcitation


Q.34: Which of the following statements is not correct?

Aldehydes and ketones undergo nucleophilic addition


Aldehydes and ketones undergo electrophilic substitution


Aldehydes and ketones contain polar carbonyl group


Lower members of aldehydes and ketones are soluble in water due to hydrogen bonding


KL14/Chem Series-A
Q.35: According to adsorption theory ofcatalysis, the speed of the reaction increases because

Adsorption produces heat which increases the speed ofthe reaction.


In the process ofadsorption, the activation energy of the molecules becomes large.


The concentration ofthe reactant molecules at the active centres ofthe catalyst becomes high due to adsorption.


Adsorption lowers the activation energy ofthe reaction.


Q.36: A mixture of three gases Oz, Nz and COz is

one-phase system two-phase system


three-phase system four-phase system


Q.37: The pair ofcompounds having metals in their highest oxidation state is

MnOz, FeCh [Mn04r, CrOzCh


[NiCI4f-, [CoC4f


Q.38: Which statement is incorrect about the industrial Haber process for NH3production?

The catalyst used commercially is Fe


Chemisorption ofNzand Hz activates the molecules


A high temperature is needed because the forward reaction is endothermic


Both a high temperature and pressure are required


Q.39: The compound having tetrahedral geometry is




[NiCI4f-


QAO: Which ofthe following statements regarding ozone is not correct?

The oxygen-oxygen bond length in ozone is identical with that ofmolecular oxygen


The ozone is hybrid oftwo structures


The ozone molecule is angular in shape


Ozone is used as a germicide and disinfectant for the purification ofair


QA1: A complex compound in which the oxidation number ofa metal is zero is

[Pt(NH3
QA2: A ligand can also be regarded as
Lewis acid Bronsted base
Lewis base Bronsted acid

Q.43:The IUPAC name for the complex is

nitrito-N-pentaamminecobalt chloride


nitrito-N-pentaamminecobalt chloride


pentaamminenitrito-N-cobalt chloride


pentaamminenitrito-N-cobalt chloride


KL14/Chem Series-A
Q.44: Among the ligands NH3, en, and CO, the correct order oftheir increasing field strengthis

en< NH3< CO CO NH3< en


NH3< en CO NH3< CO en


Q.45: Total number ofgeometrical isomers for the complex
I

Q.46: The correct order ofincreasing bond angles in the following molecules is

ChO CI02< CI02-< ChO CI02


ChO CI02-< CI02 CI02< ChO CI02­


Q.47: Compound which gives acetone on ozonolysisis

C6HsCH =CH2 (CH3)2C


CH3CH CHCH3 CH3CH CH2


Q.48: Which ofthe following contains P bond?

Hypophosphorous acid Phosphorous acid


Pyrophosphoric acid Orthophosphoric acid


Q.49: The brown ring test for nitrates depends on

Reduction of ferrous sulphate to iron


Oxidation ofnitric oxide to nitrogen dioxide


Reduction ofnitrate to nitric oxide


Oxidising action of sulphuric acid


Q.50: The function of Fe(OH)3 in the contact process is

to detect colloidal impurity to remove moisture


to remove dust particles to remove arsenic impurity


Q.51: Addition ofHBr to propene in presence ofbenzoyl peroxide, follows

Carbanion mechanism Baeyer's rule


Markownikoffs rule Anti-Markownikoffs rule


Q.52: Which one ofthe following orders correctly represents the increasing acid strengths of the given acids?

HOCI02< HOCI03<HOClO<HOCI


HOCIO<HOCI< HOCI03< HOCI02


HOCI03< HOCI02<HOCIO<HOCI


HOCI<HOCIO< HOCI02< HOCI03


Q.53: XeF2 is isostructural with

SbCh


BaCh TeF2


KL14/Chem Series-A
Q.54: Iron exhibits and 3 oxidation states, Which ofthe following statements about iron is incorrect?

Ferrous oxide is more basic in nature than the ferric oxide


Ferrous compounds are relatively more ionic than the corresponding ferric compounds


Ferrous compounds are less volatile than the corresponding ferric compounds


Ferrous compounds are more easily hydrolyzed than the corresponding ferric compounds.


Q.55: Mercury is a liquid metal because

it has a completely filled s-orbital


it has a small atomic size


it has a completely filled d-orbital that prevents d-d overlapping oforbitals


it has a completely filled d-orbital that causes d-d overlapping


Q.56: If the first ionization energy ofH atom is 13.6 eV, then the second ionization energy of He atom is

27.2 eV 40.8 eV


54.4 eV 108.8 eV


Q.57: Which one ofthe following conversions involve change in both hybridization and shape?

NH3 NH4+


H20 H30+ BF3 BF4­


Q.58: Which one ofthe following pairs of species have the same bond order? .

CN-and NO+ CW-and CW


O2-and CW- (D}None ofthese


Q.59: The maximum number ofhydrogen bonds that a molecule ofwater can have is
I

Q.60: Which one of the following pairs is isostructural (i.e. having the same shape and hybridization)?

NF3 and BF3 BF4-and


BCh and BrCh NH3and N03­


Q.61: Which of the following hydrogen bonds is the strongest?
-H··· N .o. F
-H .o. 0 -H...F
Q.62: A body ofmass 10 mg is moving with a velocity of 100 ms-I. The wavelength of de­Broglie wave associated with it would be (Note: h 6.63 x 1O-34Js)

6.63 x 1O-37m 6.63 x 1O-31m


6.63 x 1O-34m 6.63 x 1O-35m


KL14/Chem Series-A


Q.63: In a hydrogen atom, ifenergy of an electron in ground state is 13.6 eV, then that in the 2nd excited state is

1.51 eV 3.4 eV


6.04eV 13.6 eV


Q.64: Among the following compounds the one that is most reactive towards electrophilic substitution is

Toluene Benzene


Benzoic Acid Nitrobenzene


Q.65: Which list below gives spin active nuclei

1H, 12C, 19F IH, BC, 19F


IH, 2H, 12C 2H, 12C, 19F


Q.66: The hydrocarbon which can react with sodium in liquid ammonia is

CH3CH2CH2C=CCH2CH2CH3 CH3CH2C=CH


CH3CH=CHCH3 CH3CH2C=CCH2CH3


Q.67: Which ofthe following compounds will not undergo Friedel-Craft's reaction easily?

Cumene Xylene


Nitrobenzene Toluene


Q.68: Which one ofthe following methods is neither meant for the synthesis nor for separation ofamines?

Wurtz reaction Hofmann method


Hinsberg method Curtius reaction


Q.69: The tendency ofBF3, and BBr3 to behave as Lewis acid decreases in the sequence

BF3> BBr3 BF3> BBr3


BBr3> BF3> BBr3> BF3


Q.70: Infrared spectroscopy provides valuable information about

Molecular weight. Melting point.


Conjugation. Functional groups.


Q.71: Cis -trans isomers are

Enantiomers Meso compounds


Diastereomers Racemic mixture


Q.72: Which ofthe following bonds would be expected to have the highest frequency stretch?

Carbon-carbon single bond Carbon-earbon double bond


Carbon-earbon triple bond Carbon-bromine single bond


Q.73: For a nucleus with nuclear spin quantum number I Y2, what are the values ofm1?

0


-Y2


KL14/Chem Series-A 8
Q.74: Rearrangements to a more stable carbocation occur in

SN2 reactions SN1 reactions


El reactions E2 reactions


Q.75: Vicinal coupling is:

Coupling between I H nuclei in an alkene


Coupling between IH nuclei attached to the same C atom


Coupling between IH nuclei attached to adjacent C atoms


Coupling between IH nuclei in an alkane


Q.76: The stereochemistry ofan SN1 reaction results in

acis/trans product depending on the antiperiplanar nature of the substrate


most substituted double bond


a complete stereochemical inversion


a racemic mixture ofproducts


Q.77: favor SN1 over SN2•

Less substituted substrates and aprotic solvents


More substituted substrates and protic solvents


More substituted substrates and aprotic solvents


Less substituted substrates and protic solvents


Q.78: A strong signal at 1700 cm-l in an IR spectrum indicates the presence of

Alcohol Ether


Carbonyl Amine


Q.79: Identify the meso compound among following
GOOH


HO+H
H+OH

HO+H H+OH
GOOH GOOH GOOH
iii

i


ii



iii


ii and iii both


Q.80: Which among the following is the enantiomer of compound A
HHH H
H
HOOC HOOC CH3 Hooc/i "CH3 HOOC
Br 3 BrBr Br
ii iii
A
i
ii

iii


i and iii both


KL14/Chem Series-A
Q.81: Which amino acid has buffering capacity

Tryptophan Cysteine


Histidine Arginine


Q.82: Carbohydrates are

Polyhydroxy compounds ofaldehydes and phenols


Polyhydroxy compounds ofaldehydes and ketones


Polyhydroxy compounds ofphenols and ketones


Polyhydroxy compounds ofphenols and alcohols


Q.83: Structural polysaccharides includes

Cellulose, hemicellulose and chitin


Cellulose, starch and chitin


Cellulose, hemicellulose and glycogen


Galactose, hemicellulose and chitin


Q.84: How many signals do you expect to see in the IH NMR spectra of (CH3)2CHBr and CH3CH2CH2Br?

I-Bromopropane: 2-bromopropane: 2.


I-Bromopropane: 2-bromopropane: 3.


I-Bromopropane: 2-bromopropane: 2.


I-Bromopropane: 2-bromopropane: 3.


Q.85: Addition of Grignard reagent to aldehyde is

Electrophilic addition Electrophilic substitution


Nucleophilic addition Nucleophilic substitution


Q.86: Give the product ofthe following reaction CH3CHO+ CH3MgBr

C2H6 CH3COCH3


(CH3)2CHOH (CH3)3COH


Q.87: Organometallic compounds oflithium are stable in

water. air.


ethyl alcohol. ether.


Q.88: The triad of nuclei that is isotonic is

6C147N159p17 6C127N149p19


6C1N 149p17 6C147N149p19


Q.89: Which ofthe following statements about amines is incorrect?

They react with acids to form salts.


Aliphatic amines are more basic than aromatic amines.


Primary amines are more basic than tertiary amines.


The biological oxidation of amines is usually carried out by monoamine oxidases.


KL14/Chem Series-A
Q.90: Which of the following statements about quaternary ammonium compounds is incorrect?

They are neutral crystalline solids.


They are insoluble in water.


They are insoluble in lipids.


They are ionic molecules


Q.91: An ether is more volatile than an alcohol having the same molecular formula due to

Dipolar character ofethers


Alcohols having resonance structures


Inter-molecular hydrogen bonding in ethers


Inter-molecular hydrogen bonding in alcohols


Q.92: Name the following reaction
CHq if:IT H
I •
I
KOH
6
Kolbe's reaction Reimer-Tiemann reaction (C)Wurtz reaction (D)Sandmeyer's reaction
Q.93: The correct order ofdecreasing acidity ofnitrophenols will be

m-Nitrophenol> p-Nitrophenol> o-Nitrophenol


o-Nitrophenol> m-Nitrophenol> p-Nitrophenol


p-Nitrophenol> m-Nitrophenol> o-Nitrophenol


p-Nitrophenol> o-Nitrophenol> m-Nitrophenol


Q.94: Which of the following is Lucas reagent?
ZnCh/Conc HCI Br2/CCl4
Ammonical silver nitrate Cold Alkaline KMn04
Q.95: CH3CHO and C6HsCH2CHO can be distinguished chemically by

Tollen's reagent test Fehling solution test


Benedict test Iodoform test


Q.96: The percentage ofradioactive substance decayed after 20 seconds when half-life is 4 seconds

92.25 96.87


50 75


Q.97: A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives

benzyl alcohol and sodium formate


sodium benzoate and methyl alcohol


sodium benzoate and sodium formate


benzyl alcohol and methyl alcohol


KLI4/Chem Series-A
Q.98: The appropriate reagent for the following transfonnation is





HO HO
Zn HCI H2, Ni NH2NH2, OK NaBHt
Q.99: A strong base can abstract a-hydrogen from Ketone Alkene Alkane Amine
Q.I00: What is X in the following reaction? C2HsCI X 3C2HsOC2Hs
CH3COCH3 C2HsONa C2HSCHO

KL14/Chem Series-A