Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Convert:Aniline into 1, 3,5-tribromobenzene.

Answer»

SOLUTION :
Discussion
2.

Convert acetone to t-butyl alcohol.

Answer»

SOLUTION :
Discussion
3.

Convert acetone into propan-2-ol.

Answer»

Solution :`UNDERSET("ACETONE")(CH_3-underset(O)underset(||)C-CH_3) underset(H_2O)overset(LiAlH_4)tounderset("Propan-2-ol")(CH_3-underset(OH)underset(|)(CH)-CH_3)`
Discussion
4.

Convert acetaldehyde to isopropyl alcohol.

Answer»

SOLUTION :
Discussion
5.

Convert: Acetaldehyde to 2-Butanol

Answer»

SOLUTION :
Discussion
6.

Convert: Acetaldehyde to Butan-2-ol

Answer»

SOLUTION :
Discussion
7.

Convert: 3-Methylaniline into 3-nitrotoluene

Answer»

SOLUTION :
Discussion
8.

Convert

Answer»

SOLUTION :
Discussion
9.

Convert 16.1 km to miles using the following units equivalents: 1 km = 1000 m, 1 ft = 12 inches, 1 m = 100 cm, 1 mile = 1760 yd, 1 inch = 2.54 cm, 1 yd = 3 ft

Answer»


Solution :`"16.1 km = 16.1 km"xx(1000M)/(1m)xx(100cm)/(1m)xx("1 INCH")/(2.54cm)xx(1ft)/("12 inches")xx(1 ft)/("12 inches")xx(1yd)/(3FT)xx("1 MILE")/(1760yd)=" 10.0 miles."`
Note that the least precise term (2.54) has three significant FIGURES.
Discussion
10.

Convert: 2-Propanol to 1-propanol

Answer»

SOLUTION :
Discussion
11.

Converstion of benzene diazonium chloride to chloro benzene is an example of which of the following reaction?

Answer»

Claisen
Friedel-craft
Sandmeyer
Wurtz

Solution :
Discussion
12.

Conversion of oxygen to ozone represented by the equation 3O_(2)rarr2O_(3) is an endothermic reaction. Enthalpy change DeltaH accompanying the reaction

Answer»

Is negative
Is positive
Is zero
Depends on temperature

Solution :For ENDOTHERMIC REACTION, `DeltaH=+ve`.
Discussion
13.

Select schemes A, B, C out of - I. acid catalysed hydration II. HBO III. Oxymercuration-demercuraton

Answer»

I in all the CASES
I,II,III
II,III,I
III,I,II.

Solution :it is the CORRECT asnwer. For details, consult section 12.6 (Industrial preparation or ALCOHOLS).
Discussion
14.

Conversion of precipitates into colloidal sol is known by which process ?

Answer»

Coagulation
Dispersion
PEPTISATION
Dissolution 

SOLUTION :Peptisation
Discussion
15.

Conversion of oxygen into ozone is non-spontaneous at

Answer»

all TEMPERATURES
high temperature
room temperature
low temperature.

Solution :`3O_(2(G)) hArr 2O_(3(g)),DeltaH= + ve, DELTAS= -ve`
EQUATION, `DeltaG= DeltaH-T Delta S = +ve - (-ve)`
`DeltaG= +ve`,
Non-spontaneous at all temperatures.
Discussion
16.

Conversion of nitrobenzene to aniline is carried out in

Answer»

NEUTRAL MEDIUM
ACIDIC medium
alkaline medium
none

Solution :acidic medium
Discussion
17.

Conversion of nitrobenzene to aniline is carried out in:

Answer»

ACIDIC medium
neutral medium
BASIC medium
may be in acidic or basic medium.

Answer :A
Discussion
18.

Conversion of milk into curd is made by :

Answer»

Diastase
Invertase
Micoderma bacilli
Lactic bacilli

Answer :D
Discussion
19.

Conversion of KMnO_4 to MnSO_4 is a process of :

Answer»

OXIDATION
Reduction
Dehydration
Bothe oxidation and reduction

Answer :B
Discussion
20.

Conversion of ester to aldehyde which of the following reagent is used ?

Answer»

`SnCl_(2) + HCL`
`Pd.BaSO_(4)+`quinoline
`Cr_(2)O_(3)`
`"(isobut)"_(2)Al-H`

ANSWER :D
Discussion
21.

Conversion of 'E' isomer of sorivudine to Z isomer of of sorivudine flow revesible first order kinetics with equilibrium constant equal to 10. Starting with 0.1M of 'E' isomer only, calculate concentration of 'E' "isomer 60 sec after the start if rate constant of forward reaction is" 0.063 min^(-1)

Answer»

0.08M
0.15M
0.04M
0.094M

Answer :D
Discussion
22.

Conversion of CH_(4) to CH_(3)Cl is an example of which of the following reaction

Answer»

Electrophilic substitution
Free radical addition
NUCLEOPHILIC substitution
Free radical substitution

Solution :When METHANE gas is treated with CHLORINE in the presence by SUNLIGHT, one hydrogen of methane replaced by the chlorine atom and forms methyl chloride. The mechanism involved in this reaction is free radical mechanism. So it is an example of free radical substitution reaction.
Discussion
23.

Conversion ofCH_3OH to CH_3COOH can suitably be carried out with the reagent (under high pressure condition) :

Answer»

`CO_2//H_2SO_4`
`CO""//BF_3`
`CO_2//BF_3`
`CO""//H_2SO_4`

ANSWER :B
Discussion
24.

Conversion of CH_(3)OH to CH_(3)COOH can suitablly be carried out with the reagent (under high pressure condition).

Answer»

`CO_(2)//H_(2)SO_(4)`
`CO //BF_(3)`
`CO_(2)//BF_(3)`
`CO //H_(2)SO_(4)`

SOLUTION :
Discussion
25.

Conversion of benzoyl chloride of benzaldehyde using H_(2)//Pd-BaSO_(4) is an example of

Answer»

STEPHEN's reaction.
Kolbe's reaction.
Rosenmund's reastion.
Etard's reaction.

Answer :C
Discussion
26.

Conversion of diazonium salt to phenol involves __________ .

Answer»

alkalinehydrolysis
DECOMPOSITION
acidic HYDROLYSIS
HYDRATION

ANSWER :C
Discussion
27.

Conversion of benzene diazonium chloride to chlorobezene is called………….

Answer»

SANDMEYER's reaction
Stephen's reaction
Gomberg reaction
Schotten - Baumann reaction

Answer :A
Discussion
28.

Conversion of benzen diazonium salt into chlorobenzne in presence of Cu_(2)Cl_(2) is called

Answer»

Azocoupling REACTION
Snadmeyer reaction
GATTERMANN reaction
Shiemann reaction

Answer :B
Discussion
29.

Conversion of an alkyl halide to alcohol can be done by _________.

Answer»

oxidation
hydration
ALKALINE hydrolysis
acidic hydrolysis

Answer :C
Discussion
30.

Conversion of alcohol to ether in the presence of conc. H_2SO_4 is an example of

Answer»

`SN^1` REACTION
`SN^2` reaction
`E^1` reaction
`E^2` reaction

Answer :B
Discussion
31.

Conversion of alcohol into ether in the presence of conc. H_(2)SO_(4) is an example of :

Answer»

`S_(N^(1))`
`S_(N^(2))`
`E^(1)` REACTION
addition reaction

ANSWER :B
Discussion
32.

Conversion of acetaldehyde into ethyl acetate in presence of aluminium ethoxide is called

Answer»

Aldol condensation
Cope reaction
Tischenko reaction
Benzoin condensation

Solution :ALDEHYDES having `alpha`-H ATOM, when TREATED with ALUMINIUM ethoxide ( in place of NaOH or KOH), undergo CANNIZZARO type of reaction with a difference that the product isolated is an ester rather than salt of acid or alcohol. Such reaction in called Tischenko reaction.
`underset"Acetaldehyde"(2CH_3CHO) overset(Al(OC_2H_5)_3)to [CH_3COOH +CH_3CH_2OH] to underset"Ethyl acetate"(CH_3COOC_2H_5)`
Discussion
33.

Conversion of a primary amide into a primary amine is called

Answer»

GABRIEL's pthalimide reaction
Hoffmann bromamide reaction
CARBYL AMINE reaction
Hinsberg's reaction

Answer :B
Discussion
34.

Conversion of acetone into 2,3-dimethylbutane-2,3-diol can be achieved by _________.

Answer»

Zn-Hg/Hcl
Wolff-Kishner reduction
Fe/Hg/`H_(2)O`
`Mg//C_(6)H_(6)`/dil.HCl

Answer :D
Discussion
35.

Conversationof CH_(4) to CH_(3)CHl is an example of which of the following reactions ?

Answer»

Free radical addition
Free radical SUBSTITUTION
Nucleophilin substitution
electrophili substitution

Solution :We know that,
`CH_(4)+Cl_(2) OVERSET(U.V."light") to HCl+CH_(3)Cl`.
In this REACTION METHANE reacts with chlorine and the four hydrogen atoms of methane are successively replaced by chlorine atoms . This typeof reaction is an example of free radical substitution.
Discussion
36.

Convert: 3-Methylaniline into 3-nitrotoluene

Answer»

SOLUTION :
Discussion
37.

Conventionalmethodscannotbeusedforseparationofindividual lanthanoid elements beacausetheirpropertiesare quitesimilar. Suggestasuitablemethod fortheirseparation.

Answer»

SOLUTION :Ionexchangemethodcanbeusedtoseparateindividuallanthanoidelements. Themethodisbaseduponthefactthathydratedradiioflanthanoidionsincreasewithincreasingatomicnumbers. THUS,WHENA solutioncontainingamixtureof severallanthanoidionsis passedthrougha COLUMN ofacationexchangeresin, theheavierelementswill COMEOUT firstfrom thecoulumn.
Discussion
38.

Controlled oxidation of primary alcohols give

Answer»

aldehydes
ketones
carboxylic acids
ethers

Answer :A
Discussion
39.

Control of sweetness of food is difficult with

Answer»

Asparatame
SUCROLOSE
Fructose
Alitame

ANSWER :D
Discussion
40.

Contribution of each face in the calculation of no. of atoms in unit cells is?

Answer»

43832
1
2
43894

Answer :A
Discussion
41.

Continuous zig-zag motion of particles was studied by

Answer»

Newton
BROWN
Tyndall
Bredig

Solution :Brown
Discussion
42.

Continuous etherification process based upon

Answer»

oxidation
intermolecular dehydration
intramolecular dehydration
reduction

Answer :B
Discussion
43.

{:(Content,Resistance ,"Volume of gas produced"),(,(at same T & P),),(Cell-1 CuSO_(4)(aq),10Omega,"at anode is" V_(1)),(Cell-2NaCI(aq),2Omega,"at anode is"V_(2)),(Cell-3 ZnSO_(4)(aq),6Omega,"at cathode is"V_(3)):}

Answer»


Solution :`{:(,Cell-1,Cell-2,Cell-3),("PRODUCT",O_(2),CI_(2),H_(2)),("n-Factor",4,2,2),("EQUIVALENT from the",1,3//4,1//4),("GIVES resistance",,,),(Mol,1//4,3//8,1//8),("Volume ratio",2,3,1):}`
Discussion
44.

Contact process is used to prepareColloidal sulphur

Answer»

`SO_(2)`
`NH_(3)`
`H_(2)SO_(4)`
`O_(3)`

ANSWER :C
Discussion
45.

Contact process is better than chamber process for the manufacture of H_2SO_4 because

Answer»

in CONTACT process PURE ACID is obtained
in contact process control of plant is easier
contact plant is cheaper
no waste gases are GIVEN out.

Solution :As pure acid is obtained in contact process.
Discussion
46.

Consumption of alcohol by vehicle drivers is detected by

Answer»

blow of mouth air in test tube containing ACIDIC `K_2Cr_2O_7`
blow of mouth air in test tube containing ALCOHOLIC KOH
blow of mouth air in test tube containing `Cu_2O`
blow of mouth air in test tube containing SCHIFF's reagent

Answer :A
Discussion
47.

Consult the table of the standard electrode potentials and suggest three substances that can oxidize ferrous ions under suitable conditions.

Answer»

SOLUTION :Oxidation of ferrous ions MEANS that the FOLLOWING reactions should OCCUR:
`Fe^(2+)toFe^(3+)+e^(-),E_(o x)^(@)=-0.77V`
Only those substances can oxidize `Fe^(2+)` to `Fe^(3+)` which are stronger oxidizing agents and have positive reduction potentials greater than 0.77 V so that EMF of the cell reaction is positive. this is so for elements lying below `Fe^(3+)//Fe^(2+)` in the electrochemical series, i.e., `Br_(2),Cl_(2)` and `F_(2)`.
Discussion
48.

Consult the table of standard eletrode potentials and suggest three substances that can oxidise ferrous ions under suitable conditions

Answer»

Solution :Oxidation of ferrous ions means the following reaction should occur <BR> : `Fe^(2+) toFe^(3+) + e^(-),E_("ox")^(@) =-0.77 V`
Only those substances can OXIDISE `Fe^(2+)` to `Fe^(3+)`which are stronger oxidising AGENTS and have POSITIVE reduction potentials greater than 0.77 V so that emf of the cell reaction is positive. Elements lying below `Fe^(3+) // Fe^(2+)`in the electrochemical series, e.g.,`Br_(2)``Cl_(2)` , and `F_(2)`will satisfy this requirement.
Discussion
49.

Consult the table of standard electrode potentials and suggets three substances that can oxidise ferrous ions under suitable conditions.

Answer»

Solution :* Substances that are stronger OXIDISING agents than ferrous ions can oxidise ferrous ions.
`Fe^(2+) to Fe^(3+) +e^(-)(E_(Fe^(2+)|Fe)^(THETA)=0.77V)`
* This implies that the substances having HIGHER reduction POTENTIAL than +0.77 V can oxidise ferrous ions to ferric ions. Three substances that can do so are `F_(2), Cl_(2) and O_(2)`.
Discussion
50.

Consult the table of standard electrode potential and suggest three substances that can oxidise ferrous ions under suitable conditions.

Answer»

Solution :Form the table it is seen that `E_(Fe(3+))^o//Fe^2=0.77V`When OXIDATION occurs in this couple, STANDARD electrode potential will be -0.77V.i.e.,`E_(Fe(2+))^o//Fe^(2+)=-0.77`.Those substances which are stronger oxidising agents only can bring about this oxidation. EXAMPLE of such oxidising agents are `Br_2,Cl_2,F_2`,etc.
Discussion