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.

The correct order of C-O bond length among CO, CO_3^(2-), CO_2 is:

Answer»

`CO_3^2 ltCO_2 LTCO`
`CO_2ltCO_3^(2-)ltCO`
`CO ltCO_3^(2-) ltCO_2`
`COLT CO_2lt CO_3^(2-)`

ANSWER :A
Discussion
2.

The correct order of C-X bond polarity is

Answer»

`CH_(3)Br gtCH_(3)ClgtCH_(3)I`
`CH_(3)IgtCH_(3)BrgtCH_(3)Cl`
`CH_(3)Cl gtCH_(3)Br GT CH_(3)I`
`CH_(3)Cl gt CH_(3)I gt CH_(3)Br`

Solution :The C-X BOND POLARITY order are as under
`CH_(3)Cl gt CH_(3)Br gt CH_(3)I`
Discussion
3.

The correct order of C–X bond polarity is:

Answer»

`CH_(3) Br gt CH_(3) CL gt CH_(3) l`
`CH_(3)l gt CH_(3) Br gt CH_(3) `Cl
`CH_(3) Cl gt CH_(3) Br gtCH_(3)`I
`CH_(3) Cl gtCH_(3) I gt CH_(3)` Br

ANSWER :C
Discussion
4.

The correct order of B.P. of R-X

Answer»

`R-I GT R-Br gt R-Cl`
`R-Cl gt R-Br gt R-I`
`R-I gt R-Cl gt R-Br`
`R-Cl gt R-I gt R-Br`

ANSWER :A
Discussion
5.

The correct order of b.p. of hydride is ......

Answer»

`PH_3ltAsH_3ltNH_3ltSbH_3`
`H_2OgtH_2Se GT H_2SgtH_2Te`
`HFltHIgtHBrgtHCl`
`HFgtH_2OgtNH_3gtPH_3`

ANSWER :C
Discussion
6.

The correct order of bond length is

Answer»

ANSWER :B
Discussion
7.

The correct order of bond dissociation enthalpy of halogens is...........

Answer»

`F_(2) GT Cl_(2) gt Br_(2) gt I_(2)` <BR>`I_(2) gt Br_(2) gt Cl_(2) gt F_(2)`
`Cl_(2) gt F_(2) gt Br_(2) gt I_(2)`
`Cl_(2) gt Br_(2) gt F_(2) gt I_(2)`

ANSWER :D
Discussion
8.

The correct order of bond anlge is :

Answer»

`NO_(2)^(-)gtNO_(2)^(+)gtNO_(2))`
`NO_(2)^(+)gtNO_(2)^(+)gtNO_(2)`
`NO_(2)gtNO_(2)^(+)gtNO_(2)^(-)`
`NO_(2)^(+)gtNO_(2)gtNO_(2)^(-)`

ANSWER :D
Discussion
9.

The correct order of boiling points of isomeric amines is

Answer»

TERTIARY gtsecondary gtprimary
secondarygt primarygt tertiary
primary gtsecondarygt tertiary
secondary gttertiary gtprimary

Answer :C
Discussion
10.

The correct order of bond angle (smallest first) in H_(2)S, NH_(3), BF_(3)andSiH_(4)is :

Answer»

`H_(2)S LT NH_(3)lt SiH_(4) lt BF_(3)`
`NH_(3)lt H_(2)S lt SiH_(4)lt BF_(3)`
`H_(2)S lt SiH_(4)lt NH_(3) lt BF_(3)`
`H_(2)S lt NH_(3)lt BF_(3)lt SiH_(4)`

ANSWER :A
Discussion
11.

The correct order of boiling points of alkyl halides is

Answer»

`CH_3FgtCH_3ClgtCH_3BrgtCH_3I`
`CH_3FgtCH_3BrgtCH_3ClgtCH_3I`
`CH_3IgtCH_3BrgtCH_3ClgtCH_3F`
`CH_3ClgtCH_3BrgtCH_3FgtCH_3I`

ANSWER :C
Discussion
12.

The correct order of boiling points of the following isomeric amines is C_4H_9NH_2,(C_2H_5)_2NH,C_2H_5N(CH_3)_2

Answer»

`C_2H_5N(CH_3)_2 GT (C_2H_5)NH gt C_4H_9NH_2`
`(C_2H_5)_2NH gt C_2H_5N(CH_3)_2 gt C_4H_9NH_2`
`(C_4H_9)NH_2 gt (C_2H_5)_2NH gt C_2H_5N(CH_3)_2`
`(C_2H_5)_2NH gt C_4H_9NH_2 gt C_2 H_5 (CH_3)_2`

ANSWER :C
Discussion
13.

The correct order of boiling points for primary (1^@), secondary (2^@) and tertiary (3^@) alcohols is

Answer»

`1^@GT2^@GT3^@`
`3^@gt2^@GT1^@`
`2^@gt1^@gt3^@`
`2^@gt3^@gt1^@`

Answer :A
Discussion
14.

The correct order of boiling point is:

Answer»

`T_(2)ltD_(2)gtH_(2)`
n-pentane`LT`neo-pentane
`XeltArltHe`
m-nitrophenol`gt` o-nitrophenol

Solution :(a) `T_(2)gtD_(2)gtH_(2)`[BP`prop`mol.wt.]
(b)n-pentane`gt`neo-pentane[BP`prop`VWF`prop`CONTACT area `prop(1)/("BLEACHING")]`
(c)`XegtArgtHe`[BP`prop`mol.wt.]
(d)
Discussion
15.

The correct order of boiling point is

Answer»

`T_(2) lt D_(2) lt H_(2)`
`"n - pentane" lt "neo - pentane"`
`XE lt Ar lt He`
`"m - NITROPHENOL "gt " o - nitrophenol"`

Answer :D
Discussion
16.

The correct order of boiling point is :

Answer»

`I GT II gt III`
`III gt II gt I`
`II gt I gt III`
`III gt I gt II`

ANSWER :B
Discussion
17.

The correct order of boiling point for the given elements is

Answer»

`HegtNegtXegtArgtKr`
`XegtKrgtArgtNegtHe`
`HegtNegtArgtKrgtXe`
`XegtArgtKrgtNegtHe`

ANSWER :B
Discussion
18.

The correct order of boiling point is :

Answer»

`NH_(3) LT HF lt H_(2)O lt H_(2)O_(2)`
`NH_(3) lt HF lt H_(2)O_(2) lt H_(2)O`
`NH_(3) lt H_(2)O lt HF lt H_(2)O_(2)`
`HF lt NH_(3) lt H_(2)O lt H_(2)O_(2)`

Answer :A
Discussion
19.

The correct order of boiling point for primary (1^(@)) , secondary (2^(@)) and tertiary (3^(@)) alcohols is

Answer»

`1^(@) GT 2^(@) gt 3^(@)`
`3^(@) gt 2^(@) gt 1^(@)`
`2^(@) gt 1^(@) gt 3^(@)`
`2^(@) gt 3^(@) gt 1^(@)`

Solution :`1^(@)` alcohol `gt 2^(@)` alcohol `gt 2^(@)` alcohol
Boiling POINT of ALCOHOLS decreases as the number of branches increases.
Discussion
20.

Order of boiling point among primary , secondary and tertiary alcohols is :

Answer»

`1^(@) GT 2^(@) gt 3^(@)`
`3^(@) gt 2^(@) gt 1^(@)`
`2^@ gt 1^(@) gt 3^(@)`
`2^(@) gt 3^(@) gt 1^(@)`

ANSWER :A
Discussion
21.

The correct order of basictiies of the following compounds is : . 3. (CH_(3))_(2)NH. 4. CH_(3)-overset(O)overset(||)(C)-NH_(2)

Answer»

`(2) GT (1) gt (3) gt (4)`
`(1) gt (3) gt (2)gt (4)`
`(3) gt (1) gt (2) gt (4)`
`(1) gt (2) gt (3) gt (4)`

Solution :`(1) gt (3) gt (2)gt (4)`.
1.` (##KSV_CHM_ORG_P2_C15_E01_152_S01.png" width="80%"> LTBRGT More basci due to the presence of two ` LP overlinee^, s` on each (N).
2.` EtNH_2`, Due to `+I` effect of (Et) group , but `+ I` effect to two Me groups is greater than `+I` effect of `(Et)` group. Hence (3) is more basic than (2).
3.`(CH_3)_2 NH`. Due to `(+I)` effect of two Me groups.
4.` (##KSV_CHM_ORG_P2_C15_E01_152_S02.png" width="80%">
(Amides are resonance STABILISED , so they are the weakest base , Amides behalve as amphoteric ).
Discussion
22.

The correct order of boiling point among the following.

Answer»

`PH_(3) gt NH_(3) gt N (CH_(3))_(3) gt N (C_(2)H_(5))_(3)`
`NH_(3) gt PH_(3) gt N (CH_(3))_(3) gt N (C_(2)H_(5))_(3)`
`NH_(3) gt N (C_(2)H_(5))_(3) gt N (CH_(3))_(3) gt PH_(3)`
`NH_(3) gt N (C_(2)H_(5))_(3) gt PH_(3) gt N (CH_(3))_(3)`

Solution :`{:((C_(2)H_(5))_(3)N,gt,(CH_(3))_(3)N,gt,(NH_(3)),gt,PH_(3),),(88.6^(@) C,,2.9^(@) C,,-33.34^(@) C,,-87.7^(@)C,):}`
Discussion
23.

Thecorrectorderof basicityof the followingcompoundin aqueousmediumis(1) NH_(3) (2) CH_(2)CH_(2)NH_(2) (3) (CH_(3))_(2)NH (4) (C_(2)H_(5))_(3)N

Answer»

`2 GT 3 gt 1 gt 4`
`4 gt 3 gt 2 gt 1`
`4 gt 3 gt 1 gt 2`
`3 gt 2 gt 1 gt 4`

SOLUTION :Triethylaminehasmorekb valuehenceit ismore basicthandimethylamine .
Discussion
24.

Thecorrectorderof basicityof followingcompoundin aqueousmediumis(1) (C_(2)H_(5))_(2)NH (2) C_(2)H_(5) - NH_(2) (3) (CH_(3))_(2)NH (4) CH_(3)NH_(2)

Answer»

`1 gt 2 gt 3 gt 4`
` 3 GT1 gt2gt 4`
` 2 gt1 gt3 gt 4`
` 1 gt 3 gt 2 gt 4`

ANSWER :D
Discussion
25.

The correct order of basicity of the following compouds is

Answer»

`1 lt 2 lt 3 lt 4 `
`1 lt 2 lt 4 lt 3 `
`2 lt 1 lt 3 lt 4 `
`4 lt 3 lt 2 lt 1`

Solution :A few POINTS should be considered before answering this type of questions :
(i) Donation capacity of nitrogen increases if electron donating GROUP(s) (+/ or +R-effect CONTAINING) is/arc attached with it.
(ii) More nitrogen atoms (or donor atoms) means more BASICITY (in general).
(iii) `sp^(2)`-hybridiscd nitrogen is less capable of donating lone pair than `sp^(3)` -hybridised. Now, look into the structures individually.

Discussion
26.

The correct order of basicities of the following compounds is - (I) , (II) CH_(3)CH_(2)NH_(2) : (III) (CH_(3))_(2)NH , (IV) CH_(3)-overset(O)overset(||)C-NH_(2))

Answer»

`IIgtIgtIIIgtIV`
`IgtIIIgtIIgtIV`
`IIIgtIgtIIgtIV`
`IgtIIgtIIIgtIV`

ANSWER :B
Discussion
27.

The correct order of basicity of CH_(3)NH_(2)(I),(CH_(3))_(2)NH(III) and (CH_(3))_(3)N in chlorobenzene is-

Answer»

`IltIIIltII`
`IIltIIIltI`
`IlltIltIII`
`IIltIltIII`

ANSWER :C
Discussion
28.

The correct order of basicities of the following compounds is

Answer»

`2 gt 1 gt 3 gt 4`
`1 gt 3 gt 2 gt 4`
`3 gt 1 gt 2 gt 4`
`1 gt 2gt 3 gt 4`.

Solution :The CORRECT basicity order is
`{:(""NH),("||"),(CH_(3)-C-NH_(2) gt UNDERSET(2^(@)"-Amine")((CH_(3))_(2)NH) gt underset(1^(@)"-Amine")(CH_(3)CH_(2)NH_(2)) gt underset("AMIDE")(CONH_(2))):}`
Discussion
29.

The correct order of basicities of PhNH_(2)(A), and Ph_(2)NH(B) and cyclohexyl-NH_(2)(C) is

Answer»

`AgtBgtC`
`AgtCgtB`
`CgtAgtB`
`CgtBgtA`

Solution :Substituion of H-atoms of the `-NH_(2)` GROUP of `1^(@)` arylamines by electron withdrawing groups (such as PHENYL group) decreases the basicity . Order of basicity:
`UNDERSET((A))(C_(6)H_(5)NH_(2))gtunderset((B))((C_(6)H_(5))_(2)NH)`
The LONE pairs of N are not involved in delocalization in cylcohexylamine (C), hence it has HIGHEST basicity.
`therefore` Order of basicity : `CgtAgtB`
Discussion
30.

The correctorderof basicstrengthof amines inaqueousreaction? (1) C_(2)H_(5)NH_(2) (2) (CH_(3))_(2)NH (3) (C_(2)H_(5))_(2)NH (4) (C_(2)H_(5))_(3)N

Answer»

` 3 GT 2 gt 1 gt 4`
`2 gt 3 gt 4 gt 1`
`3 gt 4 gt 2 gt 1`
`1 gt 3 gt 2 gt 4`

Answer :C
Discussion
31.

Correct order of basic strengths of given amines is :

Answer»

`CH_3 NH_2 GT (CH_3)_2NH gt (CH_3)_3N gt NH_3`
`(CH_3)_2NH gt CH_3 NH_2 gt (CH_3)_3N gt NH_3`
`NH_3 gt (CH_3)_3N gt CH_3 NH_2gt(CH_3)_2NH`
`(CH_3)_3N gt (CH_3)_2NH gt CH_3 NH_2gt NH_3`

ANSWER :B
Discussion
32.

The correct order of basic strength of hydrides of group-15 is ............

Answer»

`NH_(3) GT PH_(3) gt AsH_(3) gt SbH_(3) gt BiH_(3)`
`BiH_(3) gt SbH_(3) gt AsH_(3) gt PH_(3) gt NH_(3)`
`BiH_(3) gt NH_(3) gt PH_(3) gt AsH_(3) gt SbH_(3)`
`NH_(3) gt BiH_(3) gt SbH_(3) gt AsH_(3) gt PH_(3)`

Solution :BASIC strength decreases with the decrease in electronegativity of central atom.
Discussion
33.

The correct order of basic strength of CH_(3)NH_(2)(I),(CH_(3))_(2)NH(II),(CH_(3))_(3)N(III),C_(6)H_(5)CH_(2)(IV) in gaseous phase is

Answer»

`IV lt III lt II lt I`
`IV lt III lt I lt II`
`I lt II lt III lt IV`
`IV lt I lt II lt III`

Solution :In the gaseous phase, basicity INCREASES as the +I-effect of the ALKYL groups increases, i.e., `CH_(3)NH_(2)(I) lt (CH_(3))_(2) NH lt (CH_(3))_(3) N (III).` However, due to -I-effect of the `C_(6)H_(5)-` group, `C_(6)H_(5)CH_(2)NH_(2)(IV)` is EVEN a weaker base than `CH_(3)NH_(2)(I)`. thus, the overal , basic character increases in the order: `IV lt I lt II lt III`.
Discussion
34.

The correct order of basic strength is

Answer»

`H_(2)O lt OH^(-) lt CH_(3)OH lt CH_(3)O^(-)`
`CH_(3)OH lt H_(2)O lt CH_(3)O^(-) lt OH^(-)`
`H_(2)O lt CH_(3)OH lt OH^(-) lt CH_(3)O^(-)`
`OH^(-) lt H_(2)O lt CH_(3)O^(-) lt CH_(3)OH`

Solution :Strong acids has a WEAK CONJUGATE base and vice-versa.
`underset("(Increasing order of basic strength)")overset(H_(2)O lt CH_(3)OH lt OH^(-) lt CH_(3)O^(-))rarr`
Discussion
35.

The correct order of basic strength amongst the following compound is

Answer»

`I gt II gt III gt IV`
`I lt IV lt III lt II`
`IV lt I lt III lt II`
`III lt IV lt II lt I`

SOLUTION :`Cl` group decreases the basic STRENGTH in chloroanilines. The effect is most pronounced at o-POSITION, LESS at meta position and still less at para position.
Discussion
36.

The correct order of adsorption of the gases studies will be

Answer»

`NH_(3)gt SO_(2) gt CO_(2)gt HCl`
`CO_(2)gt SO_(2) gt NH_(3)gt HCl`
`SO_(2)gt NH_(3)gt HCl gt CO_(2)`
`HCl gt SO_(2)gt NH_(3)gt CO_(2)`

SOLUTION :The CRITICAL temperatuer of the given gases are in the order `:SO_(2)gt NH_(3) gt HCl gt CO_(2).` Hence their adsorption is in the same order.
Discussion
37.

The correct order of acidity of the following compounds is

Answer»

III GT IV gt I gt II
I gt IV gt III gt II
II gt I gt III gt IV
IV gt III gt I gt II

Answer :D
Discussion
38.

The correct order of acidity is

Answer»

`C_6H_5COOH GT HCOOH gt CH_3COOH`
`HCOOH gt C_6H_5COOH gt CH_3COOH`
`C_6H_5COOH gt CH_3COOH gt HCOOH`
`HCOOH gt CH_3COOH gt C_6H_5COOH`

SOLUTION :More the number of electron donating GROUPS attached to the compound , lesser will be the acidic STRENGTH
Acidic NATURE : `HCOOH gt C_6H_5COOH gt CH_3COOH`
`pK_a : 3.75"" 4.2 "" 4.76`
Discussion
39.

The correct order of acidity in given compounds (i) FCH_(2)COOH (ii) CICH_(2)COOH (iii) NO_(2) CH_(2)COOH (iv) CH_(3)COOH.

Answer»

`IGT ii GT iii gt iv`
`iv gt iii gt ii gt i`
`iii gt iv gt igt ii`
`iii gt igt ii gt iv`.

ANSWER :D
Discussion
40.

The correct order of acidity for the following compounds is

Answer»

`IgtIIgtIIIgtIV`
`IIIgtIgtIIgtIV`
`IIIgtIVgtIIgtI`
`IgtIIIgtIVgtII`

SOLUTION :(a) It is the correct ORDER. It is EXPLAINED on the basis of ortho effect and hydrogen bonding. Ortho effect is noticed in both (I) and (II). But acid (I) is stronger because intermolecular hydrogen bonding in the conjugate base of (I) is more than that of (II) since there are TWO OH groups present. Acid (II) is STRANGER acid than acid (I).
Discussion
41.

The correct order of acidic strength of the following is (I) Oxalic acid HOOC-COOH (II) Malonic acid HOOC-CH_(2)-COOH (III) Succinic acid HOOC-(CH_(2))_(2)-COOH (IV) Glutaric acid HOOC-(CH_(2))_(3)-COOH

Answer»

`I GT II gt III gt IV`
`I gt III gt II gt IV`
`IV gt III gt II gt I`
`IV gt II gt III gt I`

ANSWER :A
Discussion
42.

The correct order of acidity for the following compounds:

Answer»

`I gt II gt III gt IV `
`IIIgt IGT IIGT IV`
`III gt IV gt II gt I`
`I gt III gt IV gt II`

Answer :A
Discussion
43.

The correct order of acidic strength of oxo acids of phosphorus is .............

Answer»

`H_(3)PO_(4) GT H_(3)PO_(3) gt H_(3)PO_(2)`
`H_(3)PO_(3) gt H_(3)PO_(2) gt H_(3)PO_(4)`
`H_(3)PO_(2) gt H_(3)PO_(3) gt H_(3)PO_(4)`
`H_(3)PO_(4) gt H_(3)PO_(2) gt H_(3)PO_(3)`

Answer :C
Discussion
44.

The correct order of acidic strength of carboxylic acids is

Answer»

FORMIC acidltbenzoic acidltacetic ACID
formic acidltacetic acidltbenzoic acid
ACETIC acidltformic acidltbenzoic acid
acetic acidltbenzoic acidltformic acid

Solution :Acetic acidltbenzoic acidltformic acid.
Discussion
45.

The correct order of acidic strength of acids : H_3PO_4, H_4P_2O_7 and H_5P_3O_10 is ..........

Answer»

`H_(3)PO_(4) gt H_(4)P_(2)O_(7) gt H_(5)P_(3)O_(10)`
`H_(4)P_(2)O_(7) gt H_(5)P_(3)O_(10) gt H_(3)PO_(4)`
`H_(5)P_(3)O_(10) gt H_(4)P_(2)O_(7) gt H_(3)PO_(4)`
`H_(5)P_(3)O_(10) gt H_(3)PO_(4) gt H_(4)P_(2)O_(7)`

SOLUTION :Acidic strength is GREATER if the number of OH GROUPS are less per P = O groups.
Discussion
46.

Which of the the order of acidic strength is not correct?

Answer»

`HI gt HBr gt HCL`
`HCl LT HClO lt HClO_(2)lt HClO_(3)`
`HClO_(2) lt HClO_(3) lt HClO_(4) lt HClO`.

SOLUTION :Correct order of acid strength is
`HClO lt HClO_(2)ltHClO_(3)ltHClO_(4)`
Discussion
47.

The correct order of acidic strength is:

Answer»

`CI_(2)O_(7) GT SO_(2) gtP_(4)O_(10)`
 `CO_(2) gt N_(2)O_(5) gt SO_(3)`
`Na_(2)O gt Mgo gt AI_(2)O_(3)`
 `K_(2)O gt CaO gtMgO`

ANSWER :a
Discussion
48.

The correct order of acidic strength is :

Answer»

`IIIgtIVgtIgtII`
`IIgtIgtIIIgtIV`
`IIgtIIIgtIgtIV`
`IIgtIgtIVgtIII`

SOLUTION :In compounds `I^(st)`& `II^(nd)` acidity is decided by Intramolecular H-bonding & compound `III^(RD)` acidity is decided by SIR (steric INHIBITION to Resonance)
Discussion
49.

The correct order of acidic strength.

Answer»

`Cl_(2)O_(7) gt SO_(2) gt P_(4)O_(10)`
`K_(2)O gt CAO gt MgO`
`CO_(2) gt N_(2)O_(5) gt SO_(3)`
`Na_(2)O gt MgO gt Al_(2)O_(3)`

Solution :Acidic NATURE of oxide `alpha` Non metallic nature of ELEMENT of Non metallic nature decrease in the order `Cl gt S gt P`.
Discussion
50.

The correct order of acidic stength is :

Answer»

<P>`Cl_2O_7gt SO_3gt P_4O_(10)`
`CO_2gt N_2O_5gt SO_3`
`Na_2Ogt MgO gt Al_(2)O_3`
`K_2OgtCaO gt MgO`

Solution :`Cl_(2)O_(7),SO_(2) and P_(4)O_(10)` are the anhydrides of `HClO_(4), H_(2)SO_(3) and H_(3)PO_(4)` WHOSE strengths are in the order
`HClO_(4) gt H_(2)SO_(3)gt H_(3)PO_(4)`.
Discussion