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.

Identify the correct resonance structures of carbon dioxide from the ones given below :

Answer»

`O-C-=O`
`O=C=O`
`.^(-)O-=C-O^+`
`.^(-)O-C-=O^+`

Solution :RESONANCE explains delocalized electrons within CERTAIN molecules or polyatomic ions where the BONDING cannot be expressed by one single Lewis formula.
`O=C=O HARR .^(+)O -=C - O^(-)hArr .^(-)O - C-=O^+`
Discussion
2.

Identify the correct resonancestructures carbondixoide from the ones given below .

Answer»

`O-C -= O`
`O = C = O`
`.^(-)O -= C- O^(+)`
`.^(-)O-C -= O^(+)`

Solution :, Thus OPTION (b) and (d) are correct.
Discussion
3.

What happens when CaC_2 reacts with H_2O ?

Answer»
Discussion
4.

Identify the correct order regarding the electro negativity of hybrid orbitals of carbon is

Answer»

`sp lt sp^(2) lt sp^(3)`
`sp GT sp^(2) gt sp^(3)`
`sp gt sp^(2) gt sp^(3) `
`sp lt sp^(2) gt sp^(3)`

Answer :b
Discussion
5.

Identify the correct order of the size of the following:

Answer»

`CA^(2+) lt K^(+) lt Ar lt S^(2-) lt CL^(-)`
`Ca^(2+) lt K^(+) lt Ar lt Cl^(-) lt S^(2-)`
`Ar lt Ca^(+) lt K^(+) lt Cl^(-) lt S^(2-)`
`Ca^(2+) lt Ar lt K^(+) lt Cl^(-) lt S^(2-)`

Solution :`Ca^(2+) lt K^(+) lt Ar lt Cl^(-) lt S^(2-)`
In isoelectronic species radius DECREASES on increasing EFFECTIVE nuclear CHARGE.
Discussion
6.

Identify the correct order of the size of the following

Answer»

`Ca^(+2) lt K^(+) lt Ar lt S^(-2) lt CL^(-)`
`Ca^(+2) lt K^+ lt Ar lt Cl^(-) lt S^(-2)`
`Ar lt Ca^(+2) lt K^(+) lt Cl^(-) lt S^(-2)`
`Ca^(+2) lt Ar lt K^(+) lt Cl^(-) lt S^(-2)`

ANSWER :B
Discussion
7.

Identify the correct order of the diatomicspecies arranged in their increasing order of bond roder .

Answer»

`He_(2)^(+) LT O_(2)^(-) lt NO lt C_(2)^(2-)`
`C_(2)^(2-) lt He_(2)^(+) lt O_(2)^(-) lt NO`
`O_(2)^(-) lt NO lt C_(2)^(2-) lt He_(2)^(+)`
`NO lt O_(2)^(2-) lt He_(2)^(+)`

ANSWER :a
Discussion
8.

Identify the correct order of solubility of Na_(2)S, CuS and ZnS in aqueous solution :

Answer»

`CuS gt ZnS gt Na_(2)S`
`ZnS gt Na_(2)S gt CuS`
`Na_(2)S gt CuS gt ZnS`
`Na_(2)S gt ZnS gt CuS`

Solution :SODIUM sulphide `(Na_(2)S)` is a strong electrolyte and it readily ionises in aqueous solution. Out of ZnS and CuS, the latter gets precipitated more easily because its `KSP (8.5 xx 10^(-45))` is less than that of `ZnS (2.5 xx 10^(-22))`. Therefore the correct order of solubility is: `Na_(2)S gt ZnS gt CuS`
Discussion
9.

Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds

Answer»

1 gt 2 gt 3 gt 4
4 gt 3 gt 2 gt 1
2 gt 1 gt 3 gt 4
2 gt 3gt 1 gt 4

Answer :C
Discussion
10.

Identify the correct order of boiling points of the following compounds (1) CH_(3)CH_(2)CH_(2)CH_(2)OH, (2) CH_(3)CH_(2)CH_(2)CHO, (3) CH_(3)CH_(2)CH_(2)COOH

Answer»

`1 GT 2 t 3`
`3 gt 1 gt 2`
`1 gt 3 gt 2`
`3 gt 2 gt 1`

ANSWER :B
Discussion
11.

Identify the correct order of boiling point of the following compounds : underset(1)(CH_(3)CH_(2)CH_(2)CH_(2)OH)" " underset(2)(CH_(3)CH_(2)CHO)" "underset(3)(CH_(3)CH_(2)CH_(2)COOH)

Answer»

`1 GT 2 gt 3 `
`3 gt 1 gt 2`
`1 gt 3 gt 2 `
`3 gt 2 gt 1 `

ANSWER :B
Discussion
12.

Identify the correct order of boiling points of the following compounds. 1) CH_(3)CH_(2)CH_(2)CH_(2)OH"2) "CH_(3)CH_(2)CH_(2)CHO"3) "CH_(3)CH_(2)CH_(2)COOH

Answer»

`1 GT 2 gt 3`
`3 gt 1 gt 2`
`1 gt 3 gt 2`
`3 gt 2 gt 1`

Solution :`III gt I gt II`
Discussion
13.

Identify the correct order of boiling point of haloalkanes?

Answer»

`CH_3 - CH_2 - CH_2 - CH_2Cl gt (CH_3)_3 C -Cl gt CH_3 - CH_2 - underset(Cl) underset(|)(CH) - CH_3`
`CH_3 - CH_2 - CH_2 - CH_2 Cl gt CH_3 - CH_2- underset(Cl)underset(|)(CH) - CH_3 lt (CH_3)_3 C - Cl`
`CH_3 - CH_2 - CH_2 -CH_2Cl gt CH_3 - CH_2 - CH_3 - underset(Cl)underset(|)overset(CH_3)overset(|)C - CH_3`
`CH_3 -underset(CH_3)underset(|)overset(CH_3)overset(|)C -Cl gt CH_3 - CH_2 - underset(Cl)underset(|)(CH) - CH_3 gt CH_3 - CH_2 - CH_2 - CH_2Cl`

SOLUTION :`CH_3 - CH_2 - CH_2 -CH_2Cl gt CH_3 - CH_2 - CH_3 - underset(Cl)underset(|)overset(CH_3)overset(|)C - CH_3`
Discussion
14.

Identify the correct order of acidic strengths of CO_(2), CuO, CaO, H_(2)O.

Answer»

`CaO LT CuO lt H_(2)O lt CO_(2)`
`H_(2)O lt CuO lt CaO lt CO_(2)`
`CaO lt H_(2)On lt CuO lt CO_(2)`
`H_(2)O lt CO_(2) lt CaO lt CuO`

Answer :A
Discussion
15.

Identify the correct order of acidic strengths of the oxides

Answer»

`CAO LT CUO lt H_2O lt CO_2`
`H_2O lt CuO lt CaO lt CO_2`
`CaO lt H_2O lt CuO lt CO_2`
`H_2O lt CO_2lt CaO lt CuO`

ANSWER :C
Discussion
16.

Identify the correct order in which the ionic radius of the following ions increases: (I) F^- , (ii)Na^+ , (III)N^(3-)

Answer»

III, I, II
I, II, III 
II, III, I 
I, I, III

Answer :B
Discussion
17.

Identify the correct match from the following lists {:("List-1","List-2"),("I) Dehydrohalogenation","a) Alc. KOH"),("II) Dehydration","b) Con. "H_(2)SO_(4)//170^(@)C),("III) Unsaturation","c) Any HX"),("IV) Epoxidation","d) "Br_(2)" water"):}

Answer»

I - B, II - d, III - C, IV - a
I - b, II - c, III - d, IV - a
I - d, II - a, II - c, IV - b
I - a, II - b, III - d, IV - c

Answer :B
Discussion
18.

Identify the correct match from the following lists

Answer»

I-b,II-d,III-e
I-b,II-c,III-e
I-d,II-a,III-e
I-e,II-c,III-e

Answer :A
Discussion
19.

Identify the correct formula of halides of alkaline earth metals from the following:

Answer»

`BaCl_(2)*2H_(2)O`
`BaCl_(2)*4H_(2)O`
`CaCl_(2)*6H_(2)O`
`SrCl_(2)*4H_(2)O`

SOLUTION :Chlorides of alkaline EARTH metals are HYDRATED and EXTENT of hydration decreases down the group. e.g., `MgCl_(2)*6H_(2)O, CaCl_(2)*6H_(2)O, BaCl_(2)*2H_(2)O, SrCl_(2)*2H_(2)O`
Discussion
20.

Identify the correct formula of halides of alkaline earth metals from the following

Answer»

`BaCl_(2). 2H_(2)O`
`BaCl_(2). 4H_(2)O`
`CaCl_(2). 6 H_(2)O`
`SrCl_(2) . 4 H_(2)O`

SOLUTION :NUMBER of molecules of water of crystallization decreases as the size of the metal cation increases . Thus , only CORRECT options are (a) and (c) .
Discussion
21.

Identify the correct decreasing order of the following with respect to altitde from atmosphere. I Troposphere II Mesophere IIIThermosphere

Answer»

II , III, I
III, II, I
I,II,III
I,III,II

ANSWER :B
Discussion
22.

Identifythe CORRECTdecreasingorderofpriorityof thefunctional groups fromthefollowing_______.

Answer»




ANSWER :B
Discussion
23.

Identify the correct decreasing order of the following with respect to altitude from atmosphere I) Trophosphere II) Meosphere Ill) Thermosphere

Answer»

II, III, I
III, II, I
I,II,III
I,III,II

Answer :B
Discussion
24.

Identify the correct decreasing order of priority of the functional groups from the following

Answer»




ANSWER :B
Discussion
25.

Identify the conpound A, X and Zin the following reactions : (i) A + 2HCl + 5H_(2)O rarr 2NaCl + X , (ii)X overset(Delta)underset(370K)(rarr) HBO_(2) overset(Delta)underset(gt370 K)rarr Z

Answer»

Solution :(i) `underset("Borax (A)")(Na_(2)B_(4)O_(7)) +2HCL + 5H_(2)O RARR 2NaCl + underset(" Boric ACID (X) ")(4H_(3)BO_(3))`
(ii) `underset((X)) OVERSET(Delta, 370 K)rarr underset(" Metaboric acid ")(HBO_(2)) + H_(2)O`
`4HBO_(2)underset(-H_(2)O)overset(Delta, gt 370 K)rarr underset(" Tetraboric acid ")([H_(2)B_(4)O_(7)]) overset(" Red HEAT ")rarr underset(" Boron trioxide (Z) ")(2B_(2)O_(3)) + H_(2)O`
Discussion
26.

Identify the compounds A,X and Z in the following reactions : (i)A+2HCl + 5H_2O to 2NaCl + X (ii)X underset"370 K"oversetDeltato HBO_2 underset(gt 370 K)oversetDeltato Z

Answer»

Solution :(i)`underset"(A)"(Na_2B_4O_7)+2HCL + 5H_2O to 2NaCl + underset"(X)"(4H_3BO_3)`
(II)`underset"(X)"(H_3BO_3) overset(Delta" 370 K")to HBO_2 + underset"(Z)"(H_2O)`
Discussion
27.

Identify the compound A, X and Z in the following reactions: (i) A+2HCl+5H_(2)Orarr2NaCl+x (ii) Xunderset(370k)overset(Delta)rarrHBO_(2)underset(gt370k)overset(Delta)rarrZ

Answer»

Solution :(i) `underset("Borax (A)")(Na_(2)B_(4)O_(7))+2HCl+5H_(2)Orarr2NaCl+underset("Orthoboric ACID (X)")(4H_(3)BO_(3))`
(ii) `H_(3)BO_(3)OVERSET(Delta,370K)(rarr) underset("Metaboric acid")(HBO_(2))+H_(2)O`
(iii) `4HBO_(2) underset(-H_(2)O)overset(Delta gt370K)(rarr)underset("Tetraboric acid")([H_(2)B_(4)O_(7)])underset("Heat")overset("RED")(rarr)underset("BORON trioxide (Z)")(2B_(2)O_(3)+H_(2)O)`
Discussion
28.

Identify the compounds A and B in the following reaction sequence. CaC_2(s)+ H_2O(l) to A(g) underset(HgSO_4)overset(H_2SO_4)to B (l)

Answer»

A is ETHYLENE, B is acetaldehyde
A is ACETYLENE, B is propionaldehyde
A is ETHANE, B is ethanol
A is acetylene, B is acetaldehyde.

Answer :D
Discussion
29.

Identify the compound Z in the following reaction C_(2)H_(6)Ooverset(Al_(2)O_(3))underset(623K)(to)Xoverset(O_(3))(to)Yoverset(Zn//H_(2)O)(to)(Z)

Answer»

Formaldehyde
Acetaldehyde
Formic acid
none of these

Answer :A::D
Discussion
30.

Identify the compound 'Z' in the following reactin

Answer»

formaldehyde
acetaldehyde
FORMIC ACID
NONE of these

ANSWER :a
Discussion
31.

Identify the compound that exhibits tautomerism………..

Answer»

2-butene
Lacitic acid
2-pentanone
Phenol

Solution :A compound having and `ALPHA C H` EXHIBIT tautomerism of keto -enol type
Discussion
32.

Identify the compound that exhibits tautomerism

Answer»

2-Pentanol
NITRO BENZENE
2-Butanone
Lactic ACID

Answer :C
Discussion
33.

Identify the compound that exhibits tautomerism.

Answer»

2-Butene
Lactic acid
2-Pentanone
Phenol

Answer :C
Discussion
34.

Identify the compound that exhibits tautomerism :

Answer»




SOLUTION :
Discussion
35.

Identify the compound possessing highest boiling point.

Answer»

1-Chloropentance
2-Chloropentane
3-Chloropentance
TETRA chlormethane

Solution :Tetra chlormethane
Discussion
36.

Identify the compound formed during the rusting of iron

Answer»

`Fe_(2)O_(3)`
`Fe_(2)O_(3).xH_(2)O`
`FeO.xH_(2)O`
FeO

Solution :`Fe_(2)O_(3).xH_(2)O`-Hydrated iron OXIDE is rust.
Discussion
37.

Identify the compound/comounds in the following in which S does not obey the octet rule. SO_(2), SF_(2), SF_(4), SF_(6)

Answer»

SOLUTION :`SF_(4), SF_(6)`
Discussion
38.

Identify the compound (A) and (B) R - C -= N overset(H_(2)"O"//H^(+))to(A)overset(H_(2)"O"//H^(+))to(B)

Answer»

Solution :`R - C -=overset(H_(2)"O"//H^(+))tounderset((A))(RCONH_(2))overset(H_(2)"O"//H^(+))tounderset((B))(RCOOH)`
Discussion
39.

Identify the colour formed when Lassigne's extract of sulphur containing organic compound is mixed with sodium nitroprusside solution?

Answer»

PRUSSIAN blue
Black
Green
Purple

Answer :D
Discussion
40.

Identify the colour formed in the test for phosphorous using ammonium molybdate.

Answer»

CRIMSON RED colour
Deep VIOLET colour
Prussian BLUE colour
Canary YELLOW colour

Answer :D
Discussion
41.

Identify the colour formed in the test for phosphorous using ammonium molybdate .

Answer»

Crimson RED colour
Deep VIOLET colour
Prussian BLUE colour
Canary YELLOW colour

Solution :Canary yellow colour
Discussion
42.

Identify the block from the following electronic configuration. (i) 6s^(2)4f^(3) "" (ii) 3s^(2) 3p^(4) (iii) 3s^(1) "" (iv) 3d^(2)4s^(2)

Answer»

Solution :`(i) 6S^(2) 4F^(3) : f-"block"(ii) 3s^(2) 3p^(4) : p - "block "`
(III) `3s^(1) : s"block" (iv) 3D^(2) ds^(2) : d -" block"`
Discussion
43.

Identify the chain propagation of chlorination of methane

Answer»

`overset(.)(C)H_(3)+overset(.)(C)ltoCH_(3)Cl`
`CH_(3)Cl+overset(.)(C)ltooverset(.)(C)H_(2)Cl+HCl`
`Cl-Clunderset("homolysis")overset(hv)tooverset(.)(C)L+overset(.)(C)l`
`overset(.)(C)l+overset(.)(C)ltoCl_(2)`

Solution :In chain propagation step a NEW free radical NEUTRAL MOLECULE is formed
Discussion
44.

Identify the case where there is change in oxidation number

Answer»

Acidified solution of`CrO_(4)^(2-)`
`SO_(2)` gas BUBBLED through an acidic solution of `Cr_(2)O_(7)^(2-)`
alkaline solution of `CrO_(4)^(2-)`
AQUEOUS solution of `CrO_(2)CI_(2)` in NaOH

Solution :(a) `2overset(+6)CrO_(4)^(2-)+2H^(+)rarroverset(+6)Cr_(2)O_(7)^(2-)+H_(2)O`
(b)`overset(Cr_(2)O_(7)^(2-)+2H^(+)+3SO_(2)rarroverset(+3)Cr_(2)(SO_(4))^(3)+H_(2)O`
(c ) `overset(+6)Cr_(2)O_(7)^(2-)+2OHA^(-)rarr2overset(+6)CrO_(4)^(2)+H_(2)O`
(d) Ammoniacal solution of `CrO_(4)^(2-)` is
`NH_(3)+H_(2)OrarrNH_(4)^(+)+OH^(-)`
`overset(+6)CrO_(4)^(2-)+2 NH_(4)^(+)RARR(NH_(4))_(2)overset(+6)crO_(4)`
`overset(+6)CrO_(2)CI_(2)+4NaOHrarrNa_(2)overset(+6)CrO_(4)+2NaCI+2H_(2)O`
Thus only in rection(b) O.N of Crchangesform +6 to +3
Discussion
45.

Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction, as shown in the given scheme:

Answer»

`C_(6)H_(5)OH` and `C_(6)H_(5)COOH`
`C_(6)H_(5)COOH` and `C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CH_(2)OH` and `C_(6)H_(5)OH`
`C_(6)H_(5)CH_(2)OH` and `C_(6)H_(5)COOH`

Answer :B::D
Discussion
46.

Identify the aryl halide among the following

Answer»




ANSWER :D
Discussion
47.

Identify the alkene which will not provide the following alcohol upon oxymercuration demercuration.

Answer»




ANSWER :D
Discussion
48.

Identify processes under the following conditions (i) dt = 0 (ii) dP = 0 (iii) dV=0

Answer»

Solution :(i) Isothermal process:Isothermal process is defined as one in which the TEMPERATURE of the system remains constant, during the change from its initial to FINAL states .
For an Isothermal process dT = 0
(ii) Isobaric process: Isobaric process is defined as one in which the pressure of the system remains constant during its change from the initial to final process dP = 0
(iii) Isobaric process: Isochoric process is defined as one in which the VOLUME of system remains constant during its change from initial to final state of the process .
For an isochoric processes DV= 0
Discussion
49.

Identify polar and non-polar molecules from the following: Cl_(2),CHCl_(3),NH_(3),BC l_(3) Or, the dipole moment of NF_(3) molecule is less than that of NH_(3) molecule. Explain.

Answer»

Solution :Polar MOLECULES: `CHCl_(3),NH_(3)`,
Non-polar moolecules: `Cl_(2),BC l_(3)`,
Discussion
50.

Identify P and (Q) respectively in the given reaction :

Answer»




ANSWER :C
Discussion