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.

Among the following which is more basic

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SOLUTION :There is no DELOCALISATION of L.P.
Discussion
2.

Among the following which is the most basic in nature?

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ANSWER :C
Discussion
3.

Among the following, which is the fifth most abundant element?

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BERYLLIUM
Barium
Radium
Calcium

Answer :D
Discussion
4.

Among the following, which is not an allylic halide?

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3-bromo-2-methyl PROPENE
4-bromo but-1-ene and
3-bromo-2-methyl but-1-ene
all of these

Solution :3-bromo-2-methyl propene
Discussion
5.

Among the following whichis less than ethene but gives Markovnikov's product in the addition of HBr

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Isobutane
`CH_2 = CH- Cl`
`CH_2 = CH-NO_2`
`CH_2 = CH-OCH_3`

Solution :Halogens deactives the alkene towards electrophilic addition DUE to I - effect but GIVES Markovnikoff addition PRODUCT due to + Meffect.
Discussion
6.

Among the following which is/are more stable than overset(*)(C)H_(3)

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`OVERSET(*)(C)H_(2)-OCH_(3)`
`overset(*)(C)H_(2)-NO_(2)`
`CH_(2)=CH-overset(*)(C)H_(2)`
`(CH_(3))_(3)overset(*)(C)`

ANSWER :C::D
Discussion
7.

Among the following which is/are correct regarding abnormal properties of lithium in IA group. A) LiHCO_(3) is not obtained in solid state while other hydrogen carbonates are solids B) Reddish brown NO_(2) is not obtained in the thermal decomposition of LiNO_(3) C) Lithium unlike other alkalimetals forns no ethynide on reaction with ethyne D)Lithium is much harder than other alkali metals

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Only A and B
Only A and C
only B and D
Only A, C and D

Answer :D
Discussion
8.

Among the following which is/are more stable C_(6)H_(5)overset(oplus)(C)H_(2)

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`(CH_(3))_(3)C^(+)`

ANSWER :A::C
Discussion
9.

Among the following which is a contaminent

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`SO_2`
PB
METHYL MERCURY
`CO_2`

ANSWER :C
Discussion
10.

Among the following which is a conrnminent

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`SO_(2)`
Pb
Methylmercury
`CO_(2)`

ANSWER :C
Discussion
11.

Among the following, which has the highest boiling point ?

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`NH_(3)`
`PH_(3)`
`AsH_(3)`
`CH_(4)`

Answer :A
Discussion
12.

Among the following which has L- configuration

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SOLUTION :
Discussion
13.

Among the following which gases are heavier then air

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Dry `O_2`
moisto `O_2`
dry `N_2`
MOIST` N_2` 

SOLUTION :M.wt of air = `0.8 xx 28 + 0.2 xx 32 = 28.8`.
Discussion
14.

Among the following which does not react even with hot water ?

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`Be`
`NA`
`MG`
`BA`

ANSWER :A
Discussion
15.

Among the following which can be liqufied easily ('a' values given in bracket in L^(2). atm "mol"^(-2) )

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`He ( 0.034)`
`XE ( 4.19) `
`NH_3 (4.17)`
`CO_2 (3.59)`

SOLUTION :more `a IMPLIES ` more EASILY LIQUIFIABLE.
Discussion
16.

Among the following transition elements, pick out the element/elements with highest second ionisation energy

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V(At. No = 23)
Cr (At. No =24)
Mn (At. No = 29)
Zn (At. No = 30)

Answer :B
Discussion
17.

Among the following, total number of compound(s) which reduce(s) the yellow solution of FeCI_(3) are:{:("Tin(II)chloride",,"potassium iodide",),("hydroxylamine",,"hydrazine sulphate",),("ascorbic acid",,"hydrogen sulphide",),("sulphur dioxide",,"potassium dichromate",),("conc.nitric acid",):}

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Solution :`{:("Tin(II) chloride",,"Potassium IODIDE",),("Hydroxylamine",,"Hydrazine SULPHATE",),("Ascorbic ACID",,"Hydrogen SULPHIDE",),("Sulphur dioxide",):}`
Discussion
18.

Among the following total number of compounds, which give(s) white precipitate with calcium chloride solution: Na_(2)S_(2)O_(3), Na_(2)CO_(3), Na_(2)C_(2)O_(4),NaBr,NaI

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Solution :`Na_(2)CO_(3),Na_(2)C_(2)O_(4)`
Discussion
19.

Among the following, total number of cations that tend to form soluble complex with excess NH_(4)OH(aq) and excess NaCN(aq): Pb^(2+), Cd^(2+), Hg^(2+), Bi^(3+), Cu^(2+), Ag^(+)

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SOLUTION :`CD^(2+), CU^(2+),AG^(+)`
Discussion
20.

Among the following, total number of anions, which decolourises the potassium peramagnate solution in acidic medium C_(2)O_(4)^(2-), NO_(2)^(-), (BaCI_(2)+SO_(4)^(2-)), S_(2)O_(3)^(2-), NO_(3)^(-)

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SOLUTION :`C_(2)O_(4)^(2-), NO_(2)^(-), S_(2)O_(3)^(2-)`
Discussion
21.

Among the following, total numbe of reagent(s) which gives yellow precipitate with ammonium chloride solution. Na_(3)[Co(NO_(2))_(6)], H_(2)[PtCI_(6)], (NaH.C_(4)H_(4)O_(6)), NaCIO_(4), NaOH

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SOLUTION :`Na_(3)[CO(NO_(2))_(6)], H_(2)[PtCI_(6)]`
Discussion
22.

Among the following, the total number of ions that form a precipitate with Na_(2)HPO_(4) in ammonical medium. Fe^(3+),Mn^(2+),AI^(3+),Mg^(2+),Ba^(2+)

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SOLUTION :`Fe^(3+),Mn^(2+),AI^(3+),Mg^(2+),BA^(2+)`
Discussion
23.

Among the following the total number of acidic radicals) that give catalytic test of iodine-azide reagent. CO_(3)^(2-),SCN^(-),S^(2-),S_(2)O_(3)^(2-),HCO_(3)^(-),SO_(3)^(2-)

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SOLUTION :`SCN^(-),S^(2-),S_(2)O_(3)^(2-)`
Discussion
24.

Amongthe followingthethird ionizationenergyis highestfor

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MAGNESIUM
Boron
Beryllium
Aluminium

Solution :both Mgand BEHAVE twovalenceelectrons thereforethirdionizationenergyof each ATOMIS thehighest.Sinceatomicsize of BEIS higher than THATOF Mg .Thusoptions ( c) iscorrect.
Discussion
25.

Among the following the strongest nucleophile is :

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`C_(2)H_(5)SH`
`CH_(3)COO^(-)`
`CH_(3)NH_(2)`
`NC CH_(2)^(-)`

Solution :`N -= C - overset(-)(C) H_(2)` is strongest nuclephile as `C-` atom with negative charge has the lowest electronegativity
Discussion
26.

Among the following the strongest base is

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`C_(6)H_(5)NH_(2)`
`p-NO_(2)-C_(6)H_(4)NH_(2)`
`m-NO_(2)-C_(6)H_(4)NH_(2)`
`C_(6)H_(5)CH_(2)NH_(2)`

SOLUTION :Among the given is more basic than others. due to I effect
Discussion
27.

Among the following the strongest acid is

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`CH_(3) COOH`
`CH_(2) ClCH_(2)COOH`
`CH_(2)ClCOOH`
`CH_(3)CH_(2) COOH`

SOLUTION :DUE to `-I` group present at `alpha-` CARBON.
Discussion
28.

Among the following, the state function (s) is(are):

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internal ENERGY
irrevcersible EXPANSION work
REVERSIBLE expansion work
molar enthalpy

ANSWER :a,d
Discussion
29.

Among the following, the state function (s)is // are

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Internal ENERGY
IRREVERSIBLE expansion WORK
Reversible expansion work
Molar enthalpy

Solution :Internal energy andmolar enthalpy depend UPON the state of the SYSTEM and hence are state function.Work depends upon path and hence is not a state function.
Discussion
30.

Among the following the standard oxidation potential is highest for

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`Be`
`MG`
`CA`
`BA`

ANSWER :D
Discussion
31.

Among the following, the species having square planar geometry for central atom are (i) XeF_(4) (ii) SF_(4) (iii) [NiCl_(4)] (iv) [PtCl_(4)]^(2)

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I and II
III and IV
ii and iii
I and iv

Answer :D
Discussion
32.

Among the following, the reaction that proceeds through an electrophilic substitution is

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SOLUTION :Halogenation of ARENES is an electrophilic SUBSTITUTION reaction.
Discussion
33.

Among the following, the reaction that proceeds through an electrophilic substitution, is :

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ANSWER :D
Discussion
34.

Among the following, the period that contains solid, liquid and gaseous elements is

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FIFTH PERIOD
Second period
FOURTH period
Third period

ANSWER :C
Discussion
35.

Among the following, the paramagnetic compound is-

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`Na_(2)O_(2)`
`O_(3)`
`N_(2)O`
`KO_(2)`

ANSWER :D
Discussion
36.

Among the following the pair that is not a pair of metamers

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`CH_(3)OCH_(2)CH_(2)CH_(3)`&`CH_(3) CH_(2)OCH_(2)CH_(3)`
`CH_(3)OCH_(2)CH_(2)CH_(3)`&`CH_(3)OCH_(2)(CH_(3))`
`CH_(3)NHCH_(2)CH_(3)`&`CH_(3)NHCH_(2)CH_(3)`
`CH_(3)COCH_(2)CH_(2)CH_(3)`&`CH_(3)CH_(2)COCH_(2)CH_(3)`

Answer :B
Discussion
37.

Among the following the pair that is not a pair of metamers is

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`CH_(3)OCH_(2)CH_(2)CH_(3) " & " CH_(3)CH_(2)OCH_(2)CH_(3)`
`CH_(2)OCH_(2)CH_(2)CH_(3) " & "CH_(3)OCH(CH_(3))_(2)`
`CH_(3)NHCH_(2)CH_(2)CH_(3) " & " CH_(3)CH_(2)NHCH_(2)CH_(3)`
`CH_(3)COCH_(2)CH_(2)CH_(3) " & "CH_(3)CH_(2)COCH_(2)CH_(3)`

ANSWER :B
Discussion
38.

Among the following , the pair of elements having same electronegativity values are A) (H,P) "" B) (Be , Al) C) (N,Cl) "" D) (C,P)

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A,B,C
B,C,D
A,C,D
A,B,C,D

Answer :C
Discussion
39.

Among the following the one which is not a 'greenhouse gas' is

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`N_2O`
`CO_2`
`CH_4`
`O_2`

ANSWER :D
Discussion
40.

Among the following , the one which can act as both as Bronsted acid as well as Bronsted base is

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`H_(3)PO_(4)`
`AlCl_(3)`
`CH_(3)CO O^(-)`
`H_(2)O`

ANSWER :D
Discussion
41.

Among the following, the one that is not a green house gas is.....

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SULPHUR DIOXIDE
Nitrous oxide
Methane
Ozone

Solution :Sulphur dioxide Other green HOUSE gases EXCEPT `CO_2`, Methane, Ozone, CFC, Nitrous oxide and water are vapour. Sulphur dioxide is not included in it.
Discussion
42.

Among the following, the number of elements showing only one non-zero oxidation state is O,Cl,F,N,P,Sn,Tl,Na and Ti.

Answer»

1
3 
2 
4 

ANSWER :A
Discussion
43.

Among the following the number of element showing only one non zero oxidationstate is O,CI,F,N ,P,Sn,TI,Na,Ti

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Solution :Non zero oxidation STATE of O are -1 -2 that of CI are -1 ,+1,+5 and +7 that of F is -1 that of P are -3 ,-2 +1,+3 and 5 that of Na is +1 and that of Ti is +2 , +3 and +4 Thus onlyF and Na can exist in ONE zero oxidation state
Discussion
44.

Among the following the number of compounds which react with Fehling's solution is :

Answer»


ANSWER :4
Discussion
45.

Among the following, the number of compounds that can react with PCl_(5) to give POCl_(3)" is ":O_(2),CO_(2),SO_(2),H_(2)O,H_(2)SO_(4),P_(4)O_(10).

Answer»


Solution :these are :
(i) `2PCl_(5)+O_(2)overset(DELTA)to2POCl_(3)+2Cl_(2),`
(II) `[PCl_(5)toPCl_(3)+Cl_(2), 2PCl_(2)+O_(2)to2POCl_(3)]`
(iii) `PCl_(5)+SO_(2)toPOCl_(3)+SOCl_(2)`
(iv) `PCl_(5)+H_(2)OtoPOCl_(3)+2HCl,`
`POCl_(3)` further reacts with `H_(2)O` to give `H_(3)PO_(4)`
`POCl_(3)+3H_(2)OtoH_(3)PO_(4)+3HCl`
(V) `2PCl_(5)+H_(2)SO_(4)to2POCl_(3)+SO_(2)Cl_(2)+2HCl`
(vi) `6PCl_(5)+P_(4)O_(10)to10POCl_(3)`
Discussion
46.

Among the following, the number of carboxylic acids which easily undergoes decarboxylation on heating are HCOOH, (COOH)_(2), CH_(2)(COOH)_(2), C_(6)H_(5)COCH_(2)COOH, C_(6)H_(5)COCOOH, C_(6)H_(5)CHOHCOOH

Answer»


ANSWER :3
Discussion
47.

Among the following, the number of aromatic compound(s) is

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ANSWER :5
Discussion
48.

Among the following the number of aromatic compound(s) is:

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ANSWER :5
Discussion
49.

Among the following , the most stable conformation of n-butane is

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Solution :Anti-conformation (C ) of n-butane is the most stable since the TWO BULKY `CH_3` GROUPS are as FAR apart as possible .
Discussion
50.

Among the following , the molecule with highest dipole moment is

Answer»

`CCl_(4)`
`NH_(3)`
`H_(2)O`
`CHCl_(3)`

Solution :
Discussion