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.

Complete the following equations i) CH_(4)+2O_(2)rarr ii) 2Fe^(3+)+SO_(2)+2H_(2)Orarr iii) C_(12)H_(22)O_(11)+H_(2)SO_(4)" (conc)"rarr

Answer»

SOLUTION :i) `CH_(4)+2O_(2)rarr CO_(2)+2H_(2)O`
ii) `2Fe^(3+)+SO_(2)+2H_(2)Orarr 2Fe^(+2)+SO_(4)^(-2)+4H^(+)`
iii) `C_(12)H_(22)O_(11)+H_(2)SO_(4)" (conc) "rarr 12C+11H_(2)O`
Discussion
2.

Complete the following equations : (i) Ag+PCl_(5)rarr (ii) CaF_(2)+H_(2)SO_(4)rarr

Answer»

SOLUTION :(i) `2Ag+PCl_(5)rarr 2AgCl+PCl_(3)`
(II) `CaF_(2)+H_(2)SO_(4)rarr CaSO_(4)+2HF (or H_(2)F_(2))`
Discussion
3.

Complete the following equations : (i)2MnO_(4)^(-) + 16 H^(+) + 5S^(2) rarr (ii) KMnO_(4) overset("heat")(rarr)

Answer»

Solution :(i) `2MnO_(4)^(-) +16H^(+) +5S^(2-) RARR 2Mn^(2+) + 8 H_(2)O +5S`
(ii) `2KMnO_(4)rarrK_(2) MnO_(4) + MnO_(2) + O_(2)`
Discussion
4.

Complete the following equations : (i) 5SO_(2)+2MnO_(4)^(-)+2H_(2)Orarr 5SO_(4)^(2-)+4H^(+)+? (ii) SO_(3)+"Conc. "H_(2)SO_(4)rarr?

Answer»

Solution :(i) `5SO_(2)+2MnO_(4)^(2-)+2H_(2)Orarr 5SO_(4)^(2-)+4H^(+)+2Mn^(++)`
(ii) `SO_(3)"conc. "H_(2)SO_(4)rarr H_(2)S_(2)O_(7)`
(iii) `2KClO_(3) overset(MnO_(2), Delta)rarr 2KCl +3O_(2)`
Discussion
5.

Complete the following equations : (i) 2KClO_(3)overset(MnO_(2)" Heat")rarr (ii) SO_(2(g))+Cl_(2(g))rarr (iii) SO_(3)+"conc. "H_(2)SO_(4)rarr

Answer»

Solution :(i) `2KClO_(3)overset(MnO_(2)" HEAT")rarr 2KCl+3O_(2)`
(ii) `SO_(2(g))+Cl_(2(g))rarr SO_(2)Cl_(2)`
(III) `SO_(3)+"CONC. "H_(2)SO_(4)rarr H_(2)S_(2)O_(7)`
Discussion
6.

Complete the following equations. (i) 2F_(2)+2H_(2)Orarr (ii) H_(2)+Cl_(2)rarr (iii) 8NH_(3)" (excess)"+3Cl_(2)rarr

Answer»

SOLUTION :(i) `2F_(2)+2H_(2)Orarr 4HF+O_(2)`
(ii) `H_(2)S+Cl_(2)RARR 2HCl+S`
(iii) `8NH_(3)" (excess)"+3CL_(2)rarr 6NH_(4)Cl+N_(2)`
Discussion
7.

Complete the following equatious: i) 2Al+3Cl_(2)rarr ii) H_(2)S+Cl_(2)rarr iiii) underset("(excess)")(8NH_(3))+3Cl_(2)rarr

Answer»

Solution :(i) `2Al+3Cl_(2)RARR 2AlCl_(3)`
(ii) `H_(2)S+Cl_(2)rarr S+2HCl`
(iii) `UNDERSET("(excess)")(8NH_(3)+3Cl_(2))rarr 6NH_(4)Cl+N_(2)`
Discussion
8.

complete the following equations: CH_4+2O_2to

Answer»

SOLUTION :`CH_4+2O_2toCO_2+2H_O`
Discussion
9.

Complete the following equations: HCHO +NH_3rarr

Answer»

SOLUTION :`6HCHO+4NH_3 RARR (CH_2)_6N_4 + UNDERSET(UROTROPINE)6H_2O`
Discussion
10.

Complete the following equations and write down the names of the products :

Answer»


SOLUTION :
Discussion
11.

Complete the following equations: CH_3CHO+CH_2OH-CH_2OH overset(H^+)rarr

Answer»

SOLUTION :
Discussion
12.

Complete the following equations: CH_(3)-O-C_(2)H_(5)+HI

Answer»

SOLUTION :`CH_(3)-O-C_(2)H_(5)+HI to CH_(3)I+C_(2)H_(5)OH`
Discussion
13.

complete the following equations: C_(12)H_(22)O_(11)overset(conc.H_2SO_4)to

Answer»

Solution :`CH_(12)H_(22)O_(11)overset(CONC)UNDERSET(H_2SO_4)to12C+11H_2O" .Cone " H_2SO_4`
Discussion
14.

Complete the following equations by writing the missing A,B,C,D etc.

Answer»

Solution :(i) `CH-=CH overset("dil"H_(2)SO_(4)) underset(HgSO_(4)) to A overset((O)) to B overset(SOCl_(2)) to C`
`A=CH_(3)CHO`
`B=CH_(3)COOH`
`C=CH_(3)COCL`
(ii) `C_(2)H_(5) overset(PCl_(5)) to A overset(KCN) to B overset(H_(2)//H^(+)) to C overset("sales line") underset(Delta) to D`
`A = C_(2)H_(5)Cl`
`B=C_(2)H_(5)CN`
`C =C_(2)H_(5)COOH`
`D= C_(2)H_(6)`
Discussion
15.

Complete the following equations by writing the missing A, B, C, D etc. (ii) C_(2)H_(5)OH overset(PCl)rarr A overset(KCN)rarr B overset(H_(2)O //H^(+))rarr C overset("sodalime")rarr D

Answer»

Solution :`A=C_(2)H_(5)CL`
`B=C_(2)H_(5)CN`
`C=C_(2)H_(5)COOH`
`D=C_(2)H_(6)`
Discussion
16.

Complete the following equations by writing the missing A, B, C, D etc. (i) CH-=CHoverset("dil. "H_(2)SO_(4))underset(HgSO_(4))rarr Aoverset([O])rarr B overset(SoCl_(2))rarr C

Answer»

SOLUTION :`A=CH_(3)CHO`
`B=CH_(3)COOH`
`C=CH_(3)COCL`
Discussion
17.

Complete the following equations and name the products formed : (i) "Phenol "+FeCl_(3)rarr (ii) CH_(3)-CH_(2)OH overset(Cu) underset(573K)rarr

Answer»

Solution :(i) `6C_(6)H_(5)OH+FeCl_(3)rarr underset("VIOLET colouration")underset("(Ferric phenoxide)")([(C_(6)H_(5)O)_(6)FE]^(3-))+3HCl+3H^(+)`
(ii) `CH_(3)-CH_(2)OH overset(Cu) underset(573K)rarr underset("Ethanal")(CH_(3)-overset(O)overset(||)C-H)+H_(2)`
Discussion
18.

Complete the following equations and name the products : (i) Phenol + FeCI_(3) to (ii) C_(6) H_(5)OH + CHCI_(3) + NaOH overset(340)(to) (iii) C_(6) H_(5) OH + Br_(2) (aq) to + CO_(2) underset(4.7 atm)overset(400 K)(to)

Answer»

Solution :(i) `[(C_(6) H_(5) O)_(3) FE] + 3 HCI`
(ii)
Discussion
19.

Complete the following equations: a) H_(2)C=CH-CH_(3)+HCl to (A) b) CH_(3)-CH=C(CH_(3))_(2)+O_(3)overset(Zn)underset(H_(2)O)to(A) + (B) c) H_(2)C=CH_(2)+O_(3) overset(H_(2)O)to(A) overset(NaOH(aq))to(B) + (C ) d) (CH_(3))_(3)C-CH=CH_(2)+HClto (A) d) MeCH_(2)C-=CHoverset(NaNH_(2))to(A)overset(Et.Br)to(B) g) HC-=CHoverset(H_(2),Pd(CaCO_(3)))underset((CH_(3)COO)_(2)Pb)to(A)overset(Br_(2))underset(CCl_(4))to (B) overset(KOH("alc"))to(C) h) HC-=CHoverset(HgSO_(4),H_(2)O)underset(H_(2)SO_(4))to(A) overset(H)underset(LiAlH_(4))to(B)overset("conc"H_(2)SO_(4))underset(443K)to(C) i) CH_(3)CH=(CH_(2)) overset(Br_(2))underset(773 K) (A) overset(Cl_(2))underset(773K)to (B) j) CH_(3)CH=CH_(2) overset(Br_(2))underset(773K)to(A) overset(KOH("alc"))underset(Delta)to(B) k) H_(2)C=CH_(2)+CH_(2)+CH_(2) to (A) l) CH_(3)CH=CH_(2) + CH_(2)I_(2) to (A) m) H_(2)C=CH-CH=CH_(2)+H_(2)=CH_(2) to (A) overset(H_(2))underset(Pd)to(B) n) C_(3)H_(7)CH=CH_(2)overset(Hg(OAc)_(2))underset(THF//H_(2)O)to (A) overset(NaBH_(4)//NaOH)to(B) o) CH_(3)CH=CH_(2) overset(BH_(3)//THF)to (A) overset(CH_(3)COOH)to (B) p) C_(6)H_(5)CH=CH_(2) overset(Br_(2))to(A) overset(3.0 "equiv")underset(CH_(3)I)to (B) q) C_(6)H_(5)CH_(2)CH(Cl)C_(6)H_(5) overset(KOH("alc"))underset(Delta)to(A) r)

Answer»

Solution :a) (A) `CH_(3)CHClCH_(3)` b) (A) `CH_(3)CHO`, (B) `CH_(3)COCH_(3)`, ( C) (A) HCHO (B) HCOONa c) `CH_(3)OH` (Formaldehyde undergoes Cannizzaro's REACTION d) (A) 2-chloro-2,3-dimethylbutane , (e) (A) `Me-CH_(2)-C-=Can` (B) `MecH_(2)C-=C-Et` (f)(A) `CH-=CH` (N) `CH_(3)CH=CHCOOH` (g) (A) `C_(2)H_(4)` (B) `CH_(2)BrCH_(2)Br` (C) `C_(2)H_(2)` (h)
(A) `CH_(3)CHO` (B) `CH_(3)CH_(2)OH` (C) `C_(2)H_(4)` (i) (A) `CH_(3)-CH=CH_(2)`
j) (A) `CH_(2)BrCH=CH_(2)` (B) `H_(2)C=C=CH_(2)` (k) (A) cyclopropane l) (A) methyl-cyclopropane (m) (A) cyclohexene (B) Cyclohexane (n) (A) `C_(3)H_(7)CH(OH)CH_(2)-HgOAc`
(B) `C_(3)H_(7)CH(OH)CH_(3)`
(o) `(A)(CH_(3)CH_(2)CH_(2))_(3)B(B) CH_(3)CH_(2)CH_(3)`
(p) (A) `C_(6)H_(5)CHBr - CH_(2)Br` (B) `C_(6)H_(5)C-=CCH_(3)`
q) (A) `C_(6)H_(2)CH=CHC_(6)H_(5)` (cis- and trans-)
r)
Discussion
20.

Complete the following equations and balance. "PbS"+4"O"_(3)to

Answer»

SOLUTION :`"PBS"+4"O"_(3)to"PbSO"_(4)+4"O"_(2)`
Discussion
21.

Complete the following equations and balance. 2"Fe"^(3+)+"SO"_(2)+2"H"_(2)"O"to"Fe"^(2+)+____________+_____________.

Answer»

SOLUTION :`2"FE"^(3+)+"SO"_(2)+2"H"_(2)"O"TO2"Fe"^(2+)+"SO"_(4)^(2-)+4"H"^(+)`
Discussion
22.

Complete the following equations. a) underset("(cold and dil)")(2NaOH)+Cl_(2)rarr b) Cl_(2)+underset("(excess)")(3F_(2))overset(573K)rarr

Answer»

SOLUTION :a) `underset("(cold & DIL)")(2NAOH)+Cl_(2)rarr NaCl+NaOCl+H_(2)O`
b) `Cl_(2)+underset("(excess)")(3F_(2))overset(573K)rarr 2ClF_(3)`
Discussion
23.

Complete the following equations :(a) 5SO_(2) + MnO_(4) ^(-)+2H_(2)O to 5SO_(4)^(-) + 4H^(+) + ? (b) SO_(3) + Conc. H_(2)SO_(4) to ? (c) 2KClO_(3) overset(MnO_(2))to ?

Answer»

SOLUTION :(a) `5SO_(2) + MnO_(4) ^(-)+2H_(2)O to 5SO_(4)^(-) + 4H^(+) + 2Mn`
(b) `5SO_(3) + Conc. H_(2)SO_(4) to H_(2)S_(2)O_(7)`
(c) `2KCIO_(3) OVERSET(MnO_(2))(to) 2KCl + 3O_(2)`
Discussion
24.

Complete the following equations: a) 2Cu_(2)O+Cu_(2)Srarr b) Zrl_(4)overset("heat on")underset("Tungsten")rarr c) ZnO+C overset("coke")underset("1673 K")rarr

Answer»

Solution :a) `2Cu_(2)O+Cu_(2)S RARR 6Cu+SO_(2)`
b) `Zrl_(4)OVERSET("heat on")underset("Tungsten")rarr Zr+2I_(2)`
c) `ZnO+C overset("COKE")underset("1673 K")rarr Zn+CO`
Discussion
25.

Complete the following equations : a) 2NaOH+Cl_(2)rarrNaCl+"……"+H_(2)O b) Na_(2)SO_(3)+2HClrarr 2NaCl+H_(2)O+"……" c) Cl_(2)+3F_(2)overset(573K)rarr" …….."

Answer»

SOLUTION :(a) `NaOC_1` (B)`SO_2` (C) `2CIF_3`
Discussion
26.

Complete the following equations:

Answer»





Solution :(a) Since the final product is an aldehyde , one precursor could be the 1, 1- dichloride, these compounds are readily hydrolysed to carbonyl compounds.

The use of TWO MOLECULES of a 1, 1- dichloride and copper suggests the formation of an alkene. This is an extension of the Wurtz reaction.
(c)The given reagents clearly indicates that a Grignard reaction is involved.However, aryl chlorides do not form Grignard reagents in ether, THF is necessarily a solvent. On the other hand, aryl bromides(and iodides) readily react in ether solution. The use of aqueous ammonium chloride is a safety precaution to prevent the possibility of DEHYDRATION of the alcohol(which might occur if acid is used)
(d)
The use of iron indicates nuclear substitution. Me is o/p directing, and there is always the possibility of a steric effect at the o-position. So, we can suggest that 4-Br product will predominate. Experimental work would have to be done to find out what are the actual RESULTS. From the literature, n it appears that the 4-Br compound is formed EXCLUSIVELY.
Discussion
27.

Complete the following equation: 4Al + 3O_2 to

Answer»

SOLUTION :`2Al_2O_3`
Discussion
28.

Complete the following equations.

Answer»

SOLUTION :

Discussion
29.

Complete the following equations.

Answer»

SOLUTION :


Discussion
30.

Complete the following equations:

Answer»

SOLUTION :
Discussion
31.

Complete the following equations. 2PbO_(2)(s)overset(heat) rarr……….+………..

Answer»

SOLUTION :`2PbO_(2)(s)rarr2PbO(s)+O_(2)`
Discussion
32.

Complete the following equations:

Answer»

SOLUTION :
Discussion
33.

complete the following equations: 2Fe^(+3)+SO_2+2H_2Oto

Answer»

SOLUTION :`2FE^(3+)+SO_2=2H_2Oto2Fe^(2+)+SO_4^(2-)+4H^+`
Discussion
34.

Complete the following equations :

Answer»

Solution :`(i)C_(6)H_(12)O_(6)overset("Zymase")(rarr)2C_(2)H_(5)OH+2CO_(2)`
(ii) `underset("Starch")(2(C_(6)H_(12)O_(5))_(n))+nH_(2)Ounderset(("Diastase"))overset("Malt extract")(rarr)underset("Maltose")(n(C_(12)H_(22)O_(11)))`
(iii) `CO+2H_(2)underset("573K,200atm")overset("ZnO" +Cr_(2)O_(3))(rarr)underset("Methyl ALCOHOL")(CH_(3)OH)`
(iv) `underset("Sucrose")(C_(12)H_(22)O_(11))+H_(2)O overset("Invertase")(rrarr)underset("Glucose")(C_(6)H_(12)O_(6))+underset("Fructose")(C_(6)H_(12)O_(6))`
(v) `C_(2)H_(5)OH overset([O])(rarr)CH_(3)CHOoverset(I_(2))(rarr)Cl_(3)CHOoverset(NaOH)(rarr)CHI_(3)+HCOONa`
(vi) At 383K HCOOH and at 533K allyl alcohol.
(vii) (A) `CH_(3)CH=CH_(2)""(B) CH_(3)CHCHBrCH_(3)`
(C ) `CH_(3)CHOHCH_(3)`
(viii) (A) `C_(2)H_(5)CL""(B) C_(2)H_(5)CN`
(C )`C_(2)H_(5)CONH_(2)""(D)C_(2)H_(5)COONH_(4)`
`(E ) C_(2)H_(5)CONH_(2)`
(ix) `(A) C_(3)H_(7)Br""(B) CH_(3)CH=CH_(2)`
(C ) `CH_(3)CHBrCH_(3)""(D)CH_(3)CHNH_(2)CH_(3)`
(x)

Discussion
35.

Complete the following reactions. underset(("Cold and dilute"))(2NaOH+Cl_(2))rarr

Answer»

SOLUTION :`2NaOH+Cl_(2)rarrNaCl+NaClO+H_(2)O`
Discussion
36.

Complete the following equations. XeF_(6)+H_(2)Orarr……..+2HF

Answer»

SOLUTION :`XeFO_4`
Discussion
37.

Complete the following equation : ""RNC overset(H_(2)//Pt)(rarr)

Answer»


Answer :`underset(underset("ISOCYANIDE")("Alkyl"))(RNC) OVERSET(H_(2)//Pt)(rarr) underset(underset("N-Methylalkanamine")(2^(@)" AMINE"))(RNHCH_(3))`
Discussion
38.

Complete the following equation : i) underset("(Cold and dilute)")(2NaOH)+Cl_(2)rarr ii) 2FeSO_(4)+H_(2)SO_(4)+Cl_(2)rarr iii) underset("(Excess)")(Cl_(2)+3F_(2)rarr

Answer»

Solution :i)`2NaOH+Cl2 rarr NaCl+NaOCl+H_(2)O`
ii) `2FeSO_(4)+H_(2)SO_(4)+Cl_(2)rarr Fe_(2)(SO_(4))_(3)+2HCl`
iii) `underset("(EXCESS)")(Cl_(2)+3F_(2))rarr 2ClF_(4)`
Discussion
39.

Complete the following equation. C_(6)H_(5)NH_(2)+NaNO_(2)+2HCl overset(273-278K)rarr

Answer»

Solution :`C_(6)H_(5)N_(2)Cl+NaCl+H_(2)O`
Discussion
40.

Complete the following equation - Cu+HNO_(3)" (dilute)"rarr

Answer»

SOLUTION :`3Cu+8HNO_(3)" (DIL)"RARR 3Cu(NO_(3))_(2)+2NO+4H_(2)O`
Discussion
41.

Complete the following equation. H_(2)SO_(4)+So_(3)rarr?

Answer»

SOLUTION :`H_(2)SO_(4)+SO_(3) to HO_(2)S_(2)O_(7)`
Discussion
42.

Complete the following equationC_(6)H_(5)CHO+C_(6)H_(5)COCH_(3) rarroverset (OH^(-)//293K)

Answer»

SOLUTION :`C_(6)H_(5)-CH=CH-OVERSET(O)overset(||)(C)-C_(6)H_(5)`
Discussion
43.

Complete the following equation by writing the missing (A),(B),(C ),(D) etc. :

Answer»

SOLUTION :

Discussion
44.

Complete the following equation: ArN_(2)^(+)X^(-) +CN^(-) overset(CuCN) to……... +N_2+X^(-)

Answer»

SOLUTION :` ArN_(2)^(+)X^(-) +CN^(-) OVERSET(CUCN) toArCN +N_2+X^(-)`
Discussion
45.

Complete the following equation and balance . * Cu+H_(2)SO_(4)rarr * S+H_(2)SO_(4)rarr * C+H_(2)SO_(4)rarr * 2NaCl+H_(2)SO_(4)rarr.........+Na_(2)SO_(4)

Answer»

Solution : * `Cu+H_(2)SO_(4)rarr CuSO_(4)+2H_(2)O+SO_(2)`
* `S+2H_(2)SO_(4)rarr2H_(2)O+3SO_(2)`
* ` C+2H_(2)SO_(4)rarr2H_(2)O+2SO_(2)+CO_(2)`
* `2NaCl+H_(2)SO_(4)rarr2HCl+Na_(2)SO_(4)`
Discussion
46.

Complete the following equation.

Answer»

SOLUTION :`Cl_(2)+3F_(2)overset(573)rarr2ClF_(3)`
Discussion
47.

Completethe followingconversions?

Answer»

SOLUTION :`CH_(3)COCH_(3) + PD + 2HCL`
Discussion
48.

Complete the following Clemmensen and Wolff-Kishner reductions:

Answer»

Solution :During the REDUCTION of

to `(-CH_(2)-)` group, both the `H` atoms are supplied by the acid `(HCl)`.
i.
ii. During the reduction of to `(-CH_(2)-)`, both the `H` atoms are supplied by the SOLVENT `(H_(2)O)` FORMED by the reaction of base `(oversetset(ɵ)OH)` with `H` atoms of the hydrazone formed

III.
iv
Discussion
49.

Complete the following chemical reactions: (a) MnO_(2)+4HCl to (b) XeF_(6)+KF to (c ) I^(-)(aq)+H^(+)(aq)+O_(2)(g) to

Answer»

Solution :(a) `MnO_(2)+4HCL to MnCl_(2)+2H_(2)+Cl_(2)`
(b) `XeF_(6)+KF to K^(+)[XeF_(7)]^(-)`
(c ) `4I^(-)(aq)+4H^(+)(aq)+O_(2)(g) to 2I_(2)(s)+2H_(2)O(l)`
Discussion
50.

Complete the following chemical reaction equations : XeF_4 + H_2O to

Answer»

SOLUTION :`6 XeF_4 + 12 H_2O to 4 Xe + 2 XeO_3 + 24 HF + 3O_2 `
Discussion