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.

Mention a chemical property in which methanoic acid differs from acetic acid.

Answer»

SOLUTION :Methanoic ACID is a reducing agent. It gives silver MIRROR with Tollen.s reagent. Ethanoic acid is not a reducing agent and does not respond to TOLLENS. reagent.
Discussion
2.

Mental diseases like schizophrenia are treated using ______ drugs.

Answer»

tranquilizers
antacid
opioids
NSAID

Answer :A
Discussion
3.

Mention a chemical property in which formic acid (methanoic acid) differs from acetic acid (ethanoic acid). Or Formic acid reduces Tollens' reagent but acetic acid does not.

Answer»

Solution :Formic ACID contains a H-atom attached to a gtC=O group and hence can be regarded as an aldehyde. THEREFORE, it acts as a reducing agent and hence decolourises pink-violet colour of `KMnO_(4)` solution. Acetic acid, on the other hand, contains an alkyl (i.e., `CH_(3)`) group attached to gtC=O group. therefore, it does not acts as a reducing agent and hence does not decolourise `KMnO_(4)` solution.
`underset("Formic acid")(5HCOOH)+underset("Pink-violet")(2KMnO_(4))+3H_(2)SO_(4) to 5 CO_(2)+K_(2)SO_(4) + underset("Colourless")(2MnSO_(4))+8H_(2)O`
`underset("Acetic acid")(CH_(3)COOH) overset(KMnO_(4)//H_(2)SO_(4))to` No change in pink-violet colour of `KMnO_(4)` SOLN. ltrgt Similarly, methanoic acid reduces Tollens' reagent and fehling's solution but `CH_(3)COOH` does not.
`underset("Formic acid")(H-overset(O)overset(||)(C)-OH)+underset("Tollens' reagent")(2[AG(NH_(3))_(2)]^(+))+2OH^(-)(Heat)to underset("Silver mirror")(2Ag darr)+4NH_(3)+CO_(2)+2H_(2)O`
`underset("Formic acid")(H-overset(O)overset(||)(C)-OH)+underset("Fehling's solution")ubrace(2Cu^(2+)+4OH^(-)) overset (Heat)to underset("Red ppt.")(Cu_(2)Odarr)+CO_(2)+3H_(2)O`
`underset("Acetic acid")(CH_(3)-overset(O)overset(||)(C)-OH) underset("or Fehling's solution") overset("Tollens' reagent")to`No reaction.
Discussion
4.

Mendius method of preparation of amines consists of :

Answer»

CATALYTIC reduction of alkyl cyanides
Reduction of AMIDE with `LiAlH_4`
Reduction of nitroparaffin with Sn + HCL
Reduction of OXIMES with `Na + C_2H_5OH`

Answer :A
Discussion
5.

MeMgX react with D_2 O to produce

Answer»

`CD_(2)`
`CH_(3)D`
`CH_(3)OMgX`
`CH_(3)OD`

Solution :`CH_(3)MGX +D-O-D to CH_(3)D +MG(OD)X`
Discussion
6.

Melting points NaCl, NaBr, Nal and NaF will be in order

Answer»

`NAL gt NaBr gt NaCl gt NAF`
`NaF gt NaCl gt NaBr gt Nal`
`NaBr gt NaF gt NaCl gt Nal`
`NaCl gt Nal gt NaF gt NaBr`

Answer :B
Discussion
7.

Members of the oxygen family are called halogens.

Answer»

Solution : MEMBERS of the OXYGEN FAMILY are CALLED CHALCOGENS.
Discussion
8.

Melting point order is not correct is :-

Answer»

`NAF lt MgF_(2) lt AlF_(3)`
`NaCl gt MgCl_(2) gt AlCl_(3)`
`LiCl gt NaCl gt KCL gt RbCl`
`NaCl gt AgCl`

Solution :Correct order of `MP:NaCl gt KCl gt KCl gt RbCl gt LiCl`(LiCl is a covalent MOLECULE)
Discussion
9.

Melting point of pure acetanilide is about :

Answer»

`82^@ C `
`114^(@) C`
`212^(@)C `
`160^(@)C `

Answer :B
Discussion
10.

Melting point of any solid depends on pressure as (P_(2)-P_(1))=(DeltaH_("fusion"))/(V_(l)-V_(s))cdotln"T_(2)/(T_(1). calculate freezing point of water ("in"^(@) C ) at a pressure of 1001 bar if freezing pooint of water at 1 bar is 0^(@) C. Molar volume of ice and liquid water is 19.65 mL and 18 mL respectively and increase in enthalpy due to melting is 6600 J//mole [In 0.975=-0.025] [Instruction : Neglect sign of the temperature therefore if your answer is -8.65^(@) C, express answer is 9]

Answer»


ANSWER :7
Discussion
11.

Melting point maximum for

Answer»

LiCl
NaCl
KCL
RBCL

ANSWER :B
Discussion
12.

Melting point is higher for:

Answer»

Be
Mg
Sr
Ca

Answer :A
Discussion
13.

Melting point is highest for:

Answer»

B
Al
Ga
In

Answer :A
Discussion
14.

Melting of Zn metal and then ouring it into cold water gives:

Answer»

ZN dust
Granulated Zn
Hard Zn metal
Soft Zn metal

Answer :B
Discussion
15.

Melmoware are

Answer»

Thermosetting
Thermoplastic
both (a) and (B)
NONE of these

Answer :A
Discussion
16.

Melamine plastic crockery is a codensation polymer of

Answer»

HCHO and MELAMINE
HCHO and ethylene
melamine and ethylene
None of these

Solution :Melamine PLASTIC CROCKERY is a COPOLYMER of HCHO and melamine.
Discussion
17.

Melamine.

Answer»

SOLUTION :It is USED in the MAKING CROCKERIES.
Discussion
18.

Mehtanecan beconvertedintoethaneby thereaction:

Answer»

CHLORINATION floowedby thereactionwithalocholicKOH
chlorination followedbythereactionwithaqueous KOH
chlorination FOLLOWEDBY WURTZREACTION
chlorinationfollowedbyDecarboxylation

ANSWER :C
Discussion
19.

Medius reduction converts an alkyl cyanide to

Answer»

a PRIMARY amine
an aldehyde
a ketone
an oxime.

Answer :A
Discussion
20.

Medicines used to reduce tension are called …………….. .

Answer»

SOLUTION :TRANQUILIZERS
Discussion
21.

Medicine which is antibiotic is :

Answer»

AMPICILLIN
Aspirin
Chloroquine
VALIUM.

SOLUTION :Ampicillin is an ANTIBIOTIC.
Discussion
22.

Medicine which is antibiotic is_____ .

Answer»

ibuprofen
aspirin
equalin
ofloxacin

Answer :D
Discussion
23.

Medicine which is an antibiotic is aspirin.

Answer»

SOLUTION :AMPICILIN
Discussion
24.

Medicinal name of H_(2)O_(2) is

Answer»

PERHYDROL
AludroxayI
Bithional
Dettol

Answer :A
Discussion
25.

MeCH(CN)Co underset(Delta)overset(aq.H_(2)SO_(4))rarr Me P

Answer»

P GIVING +ve iodofrom TEST and -ve test with FEHLING solution .
P giving-ve iodofrom test and +ve test with `NaHCO_(3)` solution .
P gives-ve Lucastest and +ve test with `NaHCO_(3)` solution .
P gives +vetestwith `NaHCO_(3)` and cerric AMMONIUM nitratesolution .

Solution :N//A
Discussion
26.

Mechanism of hypothetical reaction X_(2) + Y_(2) to 2 XY is given below (i) X_(2) to X + X(fast ) (ii) X + Y_(2) hArr XY + Y (slow) (iii)X + Y to XY (fast) The overall order of the reaction will be

Answer»

2
0
1.5
1

Solution :According to law of mass action
R = `K [X] [Y_(2)] "" … (i)`
From fast step
`K_(eq) = ([X]^(2))/([X_(2)])`
`[X]^(2) = K_(eq) [X_(2)]`
[X] = `sqrt(K_(eq))[X_(2)]^(1//2) …. (ii)`
From equation (i) & (ii)
`r = K [X_(2)]^(1//2) [Y_(2)]`
`r = K[X_(2)]^(1//2) [Y_(2)]` .
OVERALL order of reaction = 1 + 0.5 = 1.5
Discussion
27.

MeCH(CH_(2)COOH)_(2)underset(Delta)overset((CH_(3)CO)_(2)O)toF

Answer»


ANSWER :A::B::C::D
Discussion
28.

Mechanisms for hydrolysis of A will be :

Answer»

`A_(AC^(2))`
`A_(AL^(1))`
`A_(AC^(1))`
`A_(AL^(2))`

SOLUTION :
Discussion
29.

Mechanism of formation of A and B is

Answer»

`A_(AC^(2))`
`A_(AC^(1))`
`A_(AL^(1))`
`A_(AL^(2))`

SOLUTION :
Discussion
30.

Mechanism of formation of A and B is :

Answer»

`A_(AC^(2))`
`A_(AC^(1))`
`A_(AL^(1))`
`A_(AL_(2))`

SOLUTION :
Discussion
31.

Mechanism of acid catalysed hydration reaction involves (i) Protonation of alkene toform carbocation by electrophilic attack of H_(3)O^(+) (ii) Nucleophilic attack of water on carbocation. (iii) Deprotonation to fonn alcohol.

Answer»

(i) and (ii)
(i) and (iii)
(i), (ii) and (iii)
(ii) and (IIII)

Solution :The mechanism of the reaction involves the following three steps :
Step: 1 protonation of alkene to form carbocation by electrophilic ATTACK of `H_(3)O^(+)`
`H_(2)O+H^(+) to H_(3)O^(+)`

Step 2: Nucleophilic attack of water on carbocation.

Step 3: Deprotonation to form an alcohol.
Discussion
32.

Mechanism of a hypothetical reaction X_(2) + Y_(2) rarr 2XY is given below: (i) X_(2) rarr X + X (fast) (ii) X+Y_(2) hArr XY+Y (slow) (iii) X + Y rarr XY (fast) The overall order of the reaction will be :

Answer»

2
0
1.5
1

Answer :C
Discussion
33.

Mechanism of a hypothetical recation X_(2)+Y_(2) to 2XY is given below (i) X_(2) to X+X("fast") (ii) X+Y_(2) hArr XY+Y("Slow") (iii) X+Y to XY("fast") The overall order of the reaction will be

Answer»

`15`
`1`
`2`
`0`

ANSWER :A
Discussion
34.

Mechanism of a hypothetical reaction X_(2)+Y_(2)iff 2" XY" is given below : (i) X_(2)toX+X" (fast)" (ii) X+Y_(2)iff" XY"+Y" (slow)" (iii) X+Y to" XY (fast)" The overall order of reaction will be

Answer»

1
2
0
`1.5`

Solution :As rate depends UPON the slowest step,
Rate `=k[X]{Y_(2)]`
Taking step (i) to be reversible ( not GIVEN),
`K_(EQ) = ([X]^(2))/([X_(2)]) or [X] = k_(eq)^(1//2) [X_(2)]^(1//2)`
Substituing in (i),
Rate `= k_(eq)^(1//2) [X_(2)]^(1//2) [Y_(2)] = k'[X_(2)]^(1//2)[Y_(2)]`
OVERALL order `= (1)/(2) + 1 = (3)/(2) = 1.5`
Discussion
35.

Mechanism for hydrolysis of A will be

Answer»

`A_(AC^(2))`
`A_(AL^(1))`
`A_(AC^(1))`
`A_(AL^(2))`

SOLUTION :
Discussion
36.

Mechanical work is specially important in system that contain

Answer»

Solid-liquid
Liquid-liquid
Solid-solid
Gases

Solution :MECHANICAL work is important only in gases as they UNDERGO APPRECIABLE change in volume.
Discussion
37.

Measurement of rate of oxygen utillsation by a unit volume of water over a period of time is to measure.:

Answer»

BIOGAS generation
Biochemical OXYGEN demand
Biosynthetic pathways
Fermentation

Answer :B
Discussion
38.

Measurement of the amount of dry gas collected over a water from volume of moist gas is based on :

Answer»

Gay Lussac's law
Boyle's law
Charles' law
Dalton's law of PARTIAL PRESSURE.

ANSWER :D
Discussion
39.

Measurement of disorderness or randommess of the system is _____.

Answer»


ANSWER :ENTROPY
Discussion
40.

Measles is a disease whichbelongs to the category of

Answer»

Veneral disease
Viral disease
Bacterial disease
Protozoan disease

Answer :B
Discussion
41.

Measles is a disease which belongs to the category is?

Answer»

VIRAL DISEASE
bacterial disease
Veneral disese
Prozoan disease

Solution :viral disease
Discussion
42.

Measles is a disease which belong to the category of :

Answer»

BACTERIAL disease
Viral disease
Venereal disease
Protozoan disease

Answer :B
Discussion
43.

Me_3SiCl is used during polymerisation of organoisilicones because-

Answer»

chain length of organosilicone polymers can be controlled by ADDING `MeSiCl`
`Me_3SiCl` blocks the end terminal of silicone polymer
`Me_3SiCl` improves the quality and YIELD of the polymer
`Me_3SiCl` acts as a catalyst during polymerisation

Answer :A::B
Discussion
44.

Me_(3)C CH_(2)COOH is more acidic than Me_(3)SiCH_(2)COOH.

Answer»

Solution :SI (E.N.=1.8) is more electropositive than C (E.N.=2.5), therefore, `Me_(3)Si` (trimethylsilyl group) has greater +I-effect than that of `Me_(3)C` (t-butyl group). As a result, `Me_(3)Ci` intesifies the -ve charge on the carboxylate ion relative to t-butyl group and HENCE `Me_(3)C CH_(2)COOH` is a stronger acid than `Me_(3)SiCH_(2)COOH`.
.
Discussion
45.

Me_(2)C=CHCH_(2)-underset(Me)underset(|)C=CH-CH_(3)overset(H^(+))to'P' The main product 'P' is:

Answer»




SOLUTION :N//A
Discussion
46.

M(CO)_(x)(NO)_(y)underset(-CO)overset(+NO) to M(NO)_z Where EAN of metal (M) in both produce and reactant is samme and it is 54. then calculate value of (x+y=-z). (where x,y and z are netural numbers and M belong to 6th group according to long form of periodic table)

Answer»


SOLUTION :Metal `(M) impliesMo(z=42)`
`Mo(CO)_(x)(NO)_(y) UNDERSET(-co)overset(+NO) to Mo(NO)_(z)`
if y=2, then x=3 and z=4, HENCE x=y-z=3+2-4=1
Discussion
47.

MCI_(2) + K_(2)CrO_(4) rarr yellow ppt what can be MCI_(2) a. If it is soluble in hot water? b. If is gives green colour in flame ?

Answer»

SOLUTION :(A) `PbCI_(2)`
(B) `BaCI_(2)`
Discussion
48.

[M(CO)_(x)(NO)_(y)] in this complex if all NO are replaced by CO can be [M(CO)_(z)] complex and EAN value for M is 36 value of x, y, z and M is respectively :

Answer»

3, 2, 5 and Fe
2, 2, 5 and Fe
3, 2, 6 and Fe
2, 3, 5 and Ru

Solution :`Feto[Fe(CO)_(5)]`
`rArr` EAN = 26, 3CO are replaced by 2NO
We get, `[Fe(CO)_(2)(NO)_(2)]`
`rArr x=y=2`
Discussion
49.

M.C. Bain introduced a term ........... to represent the simultaneous adsorption and absorption.

Answer»

SOLUTION :SORPTION
Discussion
50.

Maximum work done by a system is given by:

Answer»

DECREASE in Helmholtz free ENERGY `(triangleA)`
Decrease in Gibb's free energy `(triangleG)`
Decrease in INTERNAL energy
Decrease in heat energy

ANSWER :B
Discussion