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.

Donor atoms in ethylenediamine are

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N and N
N and H
N and C
C and H

Answer :A
Discussion
2.

Draw the structures of the following :(i)H_(2)S_(2)O_(8)(ii) HClO_(4)(b)How would you account for the following :(i) NH_(3)is a stronger base than PH_(3).(ii) Sulphur has a greater tendency for catenation than oxygen.(iii) F_(2) is stronger oxidising agent than Cl_(2).

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Solution :(a)`H_(2)S_(2)O_(8)`(Peroxodisulphurc acid )

(ii) `HClO_(4)`(Perchloric acid)

(ii)The property of catenation depends upon the ELEMENT - element bond. Since sulphur S-S bond STRENGTH is muchmore than O-O bond strength . Sosulphur has greater tendency for catenation than oxygen.
(iii)Since the OXIDISING power of halogens decreases from `F_(2)` to `I_(2)`.Therefore `F_(2)` is the stronger oxidising agent than `Cl_(2)`due smaller size and absent ofd- orbital.
Discussion
3.

Draw the structures of the following: (i) H_2S_2O_8 (ii) XeF_6

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SOLUTION :
Discussion
4.

Domestic waste mostly constitutes:

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non-biodegradable pollutants
biodegradable pollutants
effluents
air pollutants

Answer :B
Discussion
5.

Draw the structures of the following : (i) Pentaamminenitrito-N-cobalt (III)(ii) Hexamethyldialuminium.

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SOLUTION :
Discussion
6.

Draw the structures of the following : (i) H_(2)S_(2)O_(7)(ii) HClO_(3)(b)Explain the following observations :(i)In the structure ofHNO_(3) the N-Obond(121 pm) is shorter thanthe N-OH bond (140 pm).(ii) All the P- Cl bonds in PCl_(5) are not equivalent.(iii) ICl is more reactive than I_(2) .

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Solution :(a) (i) Structure of`H_(2)S_(2)O_(7)`(OLEUM)

(ii)`HClO_(3)`(CHLORIC acid)

(b)(i)Dueto DOUBLE bond choracter of N- O bond the length is shorter.
(ii)All theP- Cl bonds in `PCl_(5)` are not equivalenet due to the fact that the axial bond pairs suffer more repulsion as compared to equatorial bond pairs.
(iii) IClismore reactive than `I_(2)`(EXCEPT `F_(2))` . Because X-X' bond in INTERHALOGENS is weaker than X-X bond in halogens except F-F bonds.Thus , I- Clbondis weaker thanI-I bondSoIClis more reactive than `I_(2)`.
Discussion
7.

Domestic waste contains

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Non-BIODEGRADABLE POLLUTANTS
Biodegradable pollutants
Hydrocarbons
None of the above

Answer :B
Discussion
8.

Draw the structures of the following: (i) 3-Methylbutanal (ii) 4-chloropentan-2-one

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Solution :(i) `underset("3-Methylbutanal")(overset(4)(C)H_(3)-overset(CH_(3))overset(|)(.^(3)C)H-overset(2)(C)H_(2)-overset(1)(C)HO)`
(II) `underset("4-Chloropeentan-2-one")(overset(5)(C)H_(3)-overset(Cl)overset(|)(.^(4)C)H-overset(3)(C)H_(2)-overset(O)overset(||)(.^(2)C)-overset(1)(C)H_(3))`.
Discussion
9.

Draw the structures of the following: (i) ClF_3 (ii) XeF_4

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SOLUTION :(i) STRUCTURE of `ClF_3 `

(II) Structure of `XeF_4`
Discussion
10.

Domesticcooking gasconsistsof moslty:

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methane and ETHANE
LIQUEFIED butaneand iso - butane
ehtaylene and CARBON monoxide
hydrogenandacetylene

Answer :B
Discussion
11.

Draw the structures of the following compounds : (i) N-isopropylaniline (ii) t-butylamine

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SOLUTION :
Discussion
12.

Dollucite is an ore of :

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LI
Rb
K
Cs

Answer :D
Discussion
13.

Draw the structures of the following compounds : (i) 3-Methylbutanal "" (ii) p-Nitropropiophenone (iii) p-Methylbenzaldehyde"" (iv) 4-Methylpent-3-en-2-one (v) 4-Chloropentan-2-one""(vi) 3-Bromo-4-phenylpentanoic acid (vii) P, p'-Dihydroxybenzophenone"" (viii) Hex-2-en-4-ynoic acid .

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Solution :Structures of compounds are given as under:
(i) `overset(4)(C )H_3-underset(CH_3)underset(|)overset(3)(CH)-overset(2)(C )H_2-""^(1)overset(O)overset(||)(C )-H`
(II)
(III)
(iv) `overset(1)(C )H_3-underset(O)underset(||)overset(2)(C)-overset(3)(C)H=underset(CH_3)underset(|)overset(4)(C )-overset(5)(C)H_3`
(v) `overset(1)(C )H_3-underset(O)underset(||)overset(2)(C)-overset(3)(C)H_2-underset(Cl)underset(|)overset(4)(C )H-overset(5)(C)H_3`
(vi) `overset(5)(C )H_3-underset(C_6H_5)underset(|)overset(4)(CH)-underset(Br)underset(|)overset(3)(CH)-overset(2)(C)H_2-underset(O)underset(||)overset(1)(C )-OH`
(vii)
(viii) `overset(6)(C)H_3-overset(5)C-=overset(4)(C )-overset(3)(C )H=overset(2)(C)H-""^(1)overset(O)overset(||)(C )-OH`.
Discussion
14.

Draw the structures of the following compounds: (i) 3-Methylbutanal, (ii) p-Nitropropiophenone, (iii) p-Methylbenzaldehyde, (iv) 4-Methylpent-3-en-2-one, (v) 4-Chloropentan-2-one. (vi) 3-Bromo-4-phenylpentanoic acid, (vii) p,p'-Dihydroxybenzophenone, (viii) Hex-2-en-4-ynoic acid.

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SOLUTION :
Discussion
15.

Dolomite is a carbonate ore of:

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CA
Mg
Both Ca and Mg
Neither Ca nor Mg

Answer :C
Discussion
16.

Draw the structures of the following compounds :

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SOLUTION :
Discussion
17.

Dolomite can also be treated to get MgCI_(2) which in turn is electrolyzed to get Mg (Dow's natural brine process). Give reactions of this process.

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Solution :`{:(MgCO_(3).CaCO_(3),underset(Delta)RARR,MgO + CaO + 2CO_(2) UARR),(,," "darr HCI darr),(MgCl_(2)+CaCO_(3) darr,overset(CO_(2))rarr,MgCI_(2) + CaCI_(2)):}`
On passing `CO_(2)` into aq. `MgCI_(2) and CaCI_(2)` solution, `CaCO_(3)` is precipitated leaving `MgCI_(2)` soluble.
Discussion
18.

Draw the structures of the following :

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SOLUTION :
Discussion
19.

Draw the structures of optical isomers of (i) [Cr(C_(2)O_(4))_(3)]^(3-) (ii) [PtCl_(2)(en)_(2)]^(2+)(iii) [Cr(NH_(3))Cl_(2)(en)]^(+)

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SOLUTION :(II) Only cis-form will SHOW OPTICAL ISOMERISM :
Discussion
20.

Pollucite is an ore of :

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LI
Rb
K
Cs

Answer :D
Discussion
21.

Draw the structures of optical isomers of : [PtCl_(2)(en)_(2)]^(2+)

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SOLUTION :Only cis-form will SHOW OPTICAL ISOMERISM as SHOWN below :
Discussion
22.

Does the soluybility of CO_(2) in water increases with rise in temperatuer ?

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SOLUTION :No. it DECREASES.
Discussion
23.

Draw the structures of optical isomers of : [Cr(NH_(3))_(2)Cl_(2)(en)]^(+)

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SOLUTION :Both CIS and trans forms will show OPTICAL isomerism `cis-[ CR(NH_(3))_(2)Cl_(2)(en)^(+)`

trans-`[Cr(NH_(3))_(2)Cl_(2)(en)^(+)`
Discussion
24.

Draw the structures of major products in each of the following reactions

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SOLUTION :
Discussion
25.

Does the solution of oil and water repersent a ture solution.?

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SOLUTION :No. It is not a TRUE solution
Discussion
26.

Draw the structures of optical isomers of : [Cr(C_(2)O_(4))_(3)]^(3-)

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SOLUTION :Structure of optical ISOMERISM of `[CR(C_(2)O_(4))_(3)]^(3-)` is given below:
Discussion
27.

Draw the structures of major monohaloproducts in each of the following : CH_3CH_2Br + NaI rarr

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SOLUTION :`CH_3CH_2I`
Discussion
28.

Does the hydrolysis of XeF_6 lead to a redox reaction ?

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Solution :No, the products of hydrolysis are `XeOF_4` and `XeO_2F_2` where the OXIDATION STATES of all the ELEMENTS REMAIN the same as it was in the reacting STATE.
Discussion
29.

Draw the structures of major monohaloproducts in each of the following :

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SOLUTION :
Discussion
30.

Draw the structures of major monohaloproducts in each of the following :

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SOLUTION :
Discussion
31.

Does the excess of NH_(4)Cl affect the precipitation of group V cations by (NH_(4))_(2)CO_(3)?

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Solution :Yes, the concentration of `CO_(3)^(2-)` is DECREASED because the common ION `NH_(4)^(o+)` suppresses the ionisation of `(NH_(4))_(2)CO_(3)`.
Discussion
32.

Draw the structures of major monohaloproducts in each of the following :

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SOLUTION :
Discussion
33.

Draw the structures of major monohalo products in each of the following reactions :CH_(3)CH_(2)Br+NaI to

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Solution :FINKELSTEIN reaction.
`underset("Ethyl Bromide")(CH_(3)CH_(2)Br)+NaI rarr underset("Ethyl iodide")(CH_(3)CH_(2)I)+NaBr`
Discussion
34.

Does the hydrolysis of XeF_(6) lead to a redox reaction ?

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Solution :Complete hydroysis of `XeF_(6)` gives `XeO_(3)`
`overset(+6)(XeF_(6))+3H_(2)O rarr overset(+6)(XeO_(3))+6 HF`
On the other hand, partial HYDROLYSIS of `XeF_(6)` gives `XeOF_(4) and XeO_(2)F_(2)`
`overset(+6)(Xe)overset(-1)(F_(6))+overset(+1)(H_(2))overset(-2)(O) rarr overset(+6)(Xe)overset(-2)(O)overset(-1)(F_(4))+overset(+1)(2H)overset(-1)(F),""overset(+6)(Xe)overset(-1)(F_(6))+overset(+1)(2H_(2))overset(-2)(O) rarr overset(+6)(Xe)overset(-2)(O_(2))overset(-1)(F_(2))+overset(+1)(4H)overset(-1)(F)`
Since the oxidation STATES of all the elements in the products of hydrolysis and reactants remain the same, therefore, it is not a redox reaction.
Discussion
35.

Draw the structures of major monohaloproducts in each of the following :

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SOLUTION :
Discussion
36.

Does the molal elevation constant depend on nature of the solute?

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Solution :(1) The molal ELEVATION constant `K_(b)` is given by, `K_(b)=(RT_(0)^(2))/(1000xxDeltaH_(ex))`, where R is a GAS constant, `T_(0)` is boiling point of a PURE solvent having latent heat of EVAPORATION `DeltaH_("ev")`.
(2) Hence `K_(b)` depends only on the nature of the solvent.
(3) `K_(b)` does not depend on the nature of the solute.
Discussion
37.

Draw the structures of major monohaloproducts in each of the following :

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SOLUTION :
Discussion
38.

Draw the structures of major monohalo products in each of the following reactions :

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SOLUTION :REACTION FOLLOWS Markovnikov.s ADDITION.
Discussion
39.

Does the adsorption of a gas on the surgace of a solid increase or decrease with rise in temperature ?

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SOLUTION :ADSORPTION DECREASES with RISE in TEMPERATURE .
Discussion
40.

Draw the structures of major monohalo products in each of the following reactions :

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Solution :BROMINATION occurs at ALLYLIC carbon in PRESENCE of LIGHT or heat.
Discussion
41.

Draw the structures of major monohalo products in each of the following reactions :

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Solution :SUBSTITUTION TAKES PLACE at benzylic CARBON.
Discussion
42.

Does formaldehyde undergo aldol condensation? Justify your answer.

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Solution :(i) FORMALDEHYDE does not undergo aldol CONDENSATION.
(ii) Aldol condensation reaction is the characteristic of CARBONYL compounds having `alpha` - hydrogen atom. So this reaction does not TAKE place in formaldehyde.
Discussion
43.

Draw the structures of (i) Sulphanilamide (ii) p-nitro benzoic acid

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SOLUTION :(i) SULPHANILAMIDE:(II) p-nitro BENZOIC ACID:
Discussion
44.

Does a zero order reaction have molecularity equal to zero?

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SOLUTION :No, MOLECULARITY of a REACTION can NEVER be ZERO.
Discussion
45.

Draw the structures of major monohalo products in each of the following reactions :

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SOLUTION :The `OH^(-)` is nuclephile and `CL^(-)` is a LEAVING GROUP.
Discussion
46.

Draw the structures of major monohalo products in each of the following reactions :

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Solution :In presence of LIGHT or heat, the BROMINATION takes PLACE on BENZYLIC CARBON.
Discussion
47.

Draw the structures of isomers of [Pt(NH_(3))_(2)Cl_(2)]

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SOLUTION :TWO GEOMETRICAL ISOMERS
Discussion
48.

Draw the structures of geometrical isomers of the following coordination complexes : [Co(NH_(3))_(3)Cl_(3)] and [CoCl_(2)(en)_(2)]^(+)

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Solution :Geometrical ISOMERS of `[CO(NH_(3))_(3)Cl_(3)]`

Geometrical isomers of `[CoCl_(2)(en)_(2)]^(+)`
Discussion
49.

Doctors detect diabetes disease by testing the presence of glucose in urine with:

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NESSLER's reagent
Fehling's solution
Fenton's reagent
Silver NITRATE solution

Answer :B
Discussion
50.

Draw the structures of following oxoacids of phosphorus : (i) Orthophosphoric acid (H_(3)PO_(4)) (ii) Pyrosphosphoric acid (H_(4)P_(2)O_(7)) (iii) Orthophosphorus acid (H_(3)PO_(3)) (iv) Hypophosphorus acid (H_(3)PO_(2)) (v) Cyclotrimetaphosphoric acid (HPO_(3))_(3) (vi) Polymetaphosphoric acid (HPO_(3))_(n)

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Solution :In OXOACIDS, PHOSPHORUS is tertrahedrally surrounded by other atoms. All these acids contain atleast one P = O bond and one P-OH bond.
The oxoacids in which phosphorus has oxidation state less than (+5) contain either P-P bond or P-H bond in addition to P-OH and P = O BONDS but not both.
Discussion