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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 reactions: CH_3CH_2 Br underset("Aq. Ethanol")overset(AgCN)to |
| Answer» SOLUTION :`to CH_3 - CH_2 - NC` | |
| 2. |
Complete the following reaction. CH_(3)-CH_(2)-CH_(2)-underset(O)underset(||)(C)-CH_(3)underset(H^(+))overset(HO-CH_(2)-CH_(2)-CH_(2)-OH)to? |
Answer» SOLUTION :
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| 4. |
Complete the following reactions : C_(6)H_(5)NH_(2)+H_(2)SO_(4) (conc.) rarr |
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Answer» Solution :COMPLETED the following REACTIONS : `C_(6)H_(5)NH_(2)+H_(2)SO_(4)(conc.) rarr underset("Anilinium hydrogen sulphate")(C_(6)H_(5)OVERSET(+)(N)H_(3)HSO_(4)^(-))` |
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| 5. |
Complete the following reactions:CaCN_(2)+H_(2)SO_(4)toCaSO_(4)+(A) (A)overset(HOH)toNH_(2)CONH_(2) CaC_(2)overset(HOH)to(B)+Ca(OH)_(2) (B)overset(O_(3)//H_(2)O)to(C )overset(H_(2)O_(2))to(D)overset("Urea")to(E ) |
Answer» SOLUTION :
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| 6. |
Complete the following reactions : C_(6)H_(5)NH_(2)+CHCl_(3)+alc. KOH rarr |
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Answer» Solution :Completed the following REACTIONS : `underset("Aniline")(C_(6)H_(5)NH_(2))+CHCl_(3)+3KOH(alc.) OVERSET(Delta)(rarr)underset(underset("(OFFENSIVE smell)")("Phenyl isocyanide"))(C_(6)H_(5)N underset(rarr)(=)C)+3KCl+3H_(2)O` |
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| 7. |
Complete the following reactions : C_(6)H_(5)NH_(2)+Br_(2) (aq) rarr |
Answer» SOLUTION :COMPLETED the FOLLOWING REACTIONS : 
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| 8. |
Complete the following reactions : C_(6)H_(5)NH_(2)+(CH_(3)CO)_(2)O rarr |
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Answer» SOLUTION :Completed the FOLLOWING reactions : `underset("ANILINE")(C_(6)H_(5)NH_(2))+underset("Acetic anhydride")(CH_(3)CO-O-COCH_(3))underset("(Acetylation)")(RARR)underset("Acetanilide")(C_(6)H_(5)CONHCH_(3))+CH_(3)COOH` |
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| 9. |
Complete the following reactions : C_(6)H_(5)N_(2)Cl+H_(3)PO_(2)+H_(2)O rarr |
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Answer» SOLUTION :Completed the following REACTIONS : `underset(underset("Chloride")("Benzenediazonium"))(C_(6)H_(5)N_(2)Cl)+H_(3)PO_(2)+H_(2)O underset("(Reduction)")overset(Cu^(+))(rarr)underset("Benzene")(C_(6)H_(6))+N_(2)+H_(3)PO_(3)+HCL` |
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| 10. |
Complete the following reactions : C_(6)H_(5)N_(2)Cl underset((ii)NaNO_(2)//Cu,Delta)overset((i)HBF_(4))(rarr) |
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Answer» Solution :COMPLETED the following reactions : `underset(underset("chloride")("BENZENEDIAZONIUM"))(C_(6)H_(5)N_(2)Cl) underset(-HCl)OVERSET(HBF_(4))(rarr)underset(underset("fluoroborate")("Benzenediazonium"))(C_(6)H_(5)overset(+)(N)_(2)BF_(4)^(-))underset(Delta)overset(NaNO_(2)//Cu)(rarr)underset("Nitrobenzene")(C_(6)H_(5)NO_(2))+BF_(3)+NaF` |
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| 11. |
Complete the following reactions: C_(6)H_(5)CH_(2))_(2)Cd+2CH_(3)COCl to |
| Answer» Solution :`2CH_(3)COCH_(2)C_(6)H_(5)+CdCl_(2)` | |
| 12. |
Complete the following reactions : C_(6)H_(5)N_(2)Cl+C_(2)H_(5)OH rarr |
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Answer» SOLUTION :Completed the following reactions : `underset(underset("chloride")("BENZENEDIAZONIUM"))(C_(6)H_(5)N_(2)Cl)+C_(2)H_(5)OH OVERSET("Reduction")(rarr) underset("Benzene")(C_(6)H_(6))+underset("Ethanal")(CH_(3)CHO)+N_(2)+HCl` |
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| 13. |
Complete the following reactions : C_2H_4 + O_2 to |
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Answer» SOLUTION :The REACTION are given as under : `C_2H_4 ` undergoes COMBUSTION to form `CO_2` and `H_2O` . `C_2H_4 + 3O_2 OVERSET("HEAT")to 2CO_2 + 2H_2O` |
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| 14. |
Complete the following reactions? C_2H_4+O_2rarr |
| Answer» SOLUTION :`C_2H_4+3O_2rarr2CO_2+2H_2O` | |
| 15. |
Complete the following reactions (c ) CH_(3)CH=CH_(2)overset(mCPBA)rarr A overset(C_(2)H_(5)MgBr)underset(H_(3)O^(+))rarr B |
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Answer» |
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| 16. |
Complete the following reactions by identitying A,B and C : (i) A+ "Hydrogen" (g) overset(Pd//BaSO_(4))to (CH_3)_2CH-CHO |
| Answer» SOLUTION :A' is `CH_(3)-UNDERSET(CH_3)underset(|)CH-OVERSET(O)overset(||)C-CI`. | |
| 17. |
Complete the following reactions BF_(3)+9H_(2)O to |
| Answer» SOLUTION :`4BF_(3)+3H_(2)O to 4H_(3)BO_(3)+3H^(+)+3[BF_(4)]^(-)` | |
| 18. |
Complete the following reactions and write main products : (vii) CH_(3)CHO overset(LiAIH_4)to |
| Answer» SOLUTION :`CH_(3)C O O C_(2)H_(5)`. | |
| 19. |
Complete the following reactions and write main products : (vi) HCHO+NH_(3)to |
| Answer» SOLUTION :`(CH_2)_(6)N_(4)`(Urotopine). | |
| 20. |
Complete the following reactions and write main products : (ix) CH_(3)COR+NaOHto. |
| Answer» SOLUTION :`CHI_(3)`. | |
| 21. |
Complete the following reactions and write main products : (iv) CH_(3)COOH+NH_(3)overset(Delta)to. |
| Answer» SOLUTION :`CH_(3)CONH_(2)`. | |
| 22. |
Complete the following reactions and identify the A,B and C in these reaction. (i) CH_(3)-CH_(2)I underset(-NaI) overset(NaCN)(to) (A) underset("Partial hydrolysis")overset(OH^(-))(to) (B) overset(Br_(2)//NaOH)(to) (C) (ii) C_(6)H_(5)N_(2)Cl overset(CuCN)(to) (A) overset(H_(2)"O"//H^(+))(to) (B) overset(NH_(3)//Delta)(to)(C) (iii) CH_(3)-CH_(2)Br overset(KCN)(to)(A)underset(4[H])overset(LiAlH_(4))(to) (B) overset(HNO_(2))(to)(C) (iv) C_(6)H_(5)NO_(2)overset(Sn//HCl)(to)(A)underset(HC//273K)overset(NaNO_(2))(to)(B)overset(H_(2)O//Delta)(to)(C) (v) CH_(3)COOH underset(Delta)overset(NH_(3))(to)(A)underset(Br_(2)//KOH)(to)(B)overset(HNO_(2))(to)(C) |
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Answer» Solution :(i) `underset("Ethyl iodide")(CH_(3)-CH_(2)I-underset(-NaI)overset(NACN)(to) underset((A))underset("Ethyl cyanide")(CH_(3)-CH_(2)CN)underset("Partial hydrlysis")overset(OH^(-))(to) underset((B))underset("Acetamide")(CH_(3)CONH_(2))overset(Br_(2)//NaOH)(to)underset((C))underset("methyl amine")(CH_(3)NH_(2))` (ii) `underset("Benzene diazonium CHLORIDE")(C_(6)H_(5)N_(2)Cl) overset(CuCN)(to) underset((A))underset("Cyano benzene")(C_(6)H_(5)CN)overset(H_(2)"O"//H^(+))(to)underset("benzoic acid")(C_(6)H_(5)COOH)overset(NH_(3)//Delta)(to) underset((C)) underset(Benzamide")(C_(6)H_(5)CONH_(2))` (III) `underset("Ethyl Bromide")(CH_(3)-CH_(2)Br)overset(KCN)(to) underset((A))underset("Ethyl cyanide")(CH_(3)-CH_(2)CN)underset(4[H])overset(LiAlH_(4))(to) `  (iv) `underset("Nitro benzene")(C_(6)H_(5)NO_(2))underset(6[H])overset(Sn//HCl)(to) underset((A))underset("Aniline")(C_(6)H_(5)NH_(2))underset(HCl//273K)overset(NaNO_(2))(to) underset("Benzene diazonium chloride"(B))(C_(6)H_(5)N_(2)^(+)Cl^(-))overset(H_(2)L//Delta)(to) underset("Phenol"(C))(C_(6)H_(5)OH)` (v) `underset("ACETIC acid")(CH_(3)COOH)underset(Delta)overset(NH_(3))(to) underset((A))underset("Acetamide")(CH_(3)CONH_(2))overset(Br_(2)//KOH)(to) underset("Methyl amine"(B))overset(CH_(3)NH_(2))overset(HNO_(2))(to) underset("Methanol " (C))(CH_(3)OH)` |
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| 23. |
Complete the following reactions and write main products : (iii) CH_(3)MgBr overset((i)CO_(2)//H^(+))underset((ii)H_(2)O//H^(+))to. |
| Answer» SOLUTION :`CH_(3)COOH` | |
| 24. |
Complete the following reactions and write main products : (i) CH_(2)CONH_(2)+HNO_(2)to |
| Answer» SOLUTION :`CH_(3)COOH` | |
| 25. |
Complete the following reactions and write main products : (ii) CH_(3)COCI+H_(2)O"(Steam)"to. |
| Answer» SOLUTION :`CH_(3)COOH` | |
| 26. |
Complete the following reactions. a. PhNO_(2) overset(Zn+aq.NH_(4)CI)rarr (I) b. p-Me-C_(6)H_(4)NO_(2) overset(As_(2)O_(3)//Aq.NaOH)rarr(II) c. m-Me-C_(6)H_(4)NO_(2) overset(LAH)rarr(III) d. PhNO_(2) overset(Zn+Alc.NaOH)rarr(IV) e. p-Me-C_(6)H_(4)NO_(2) underset(underset(Excess Zn//NaOH)(or))overset(H_(2)N NH_(2)//"Raney "Ni)rarr (V) f. Ph overset(o+)N_(2) Br^(Theta) overset(Na_(2)SO_(3))rarr (VI) g. p-Et -C_(6)H_(4)overset(o+)(N_(2)) Br^(Theta) underset("power")overset(Cu "bronze")rarr (VII) |
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Answer» Solution :(a) (I) `PhNHOH (N`-Phenyl hydroxylamine) B (II)  c. (III)  d. (IV)  e. (V)  F. (VI) `PhNHNH_(2)` (Phenyl hydrazine) g. It is an example of Gattermann reaction for making bipphenyls. h.  i. It is an example of pinacole-type ring expansion via carbocation. |
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| 27. |
Complete the following reactions a. underset((A))(PhNH_(2)) overset(HNO_(2))underset(0.5^(@)C)rarr (B) underset(DH_(2)PO_(2))rarr(C) b. c. underset((A))(PhCH)=O + underset((B))(HCN) rarr (C) overset(LAH)rarr D d. underset((A))(PhCH=O) +underset((B))(MeNO_(2)) overset(Theta)overset(OH)rarr overset(Fe,FeSO_(4))underset(H^(o+))rarrD e. |
Answer» Solution :a. b.  c. `(C) RARR Phunderset(OH)UNDERSET(|)(CH)-CN (D) rArr Ph-underset(OH)underset(|)(CH)-CH_(2)NH_(2)` |
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| 28. |
Complete the following reactions (a)CO+H_(2)underset("420-670k,300atm")overset("ZnO+Cu")to..... (b)R_(3)SiOH+OHSiR_(3)to....+.... ( c)Na_(2)CO_(3)+Sito...+.... |
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Answer» Solution :(a)`CO+2H_(2)underset("420-670k,300atm")overset("ZnO+Cu")to CH_(3)OH` (b)`R_(3)SiOH+OHSiR_(3)to R_(3)Si-O-SiR_(3)+H_(2)O` ( c)`Na_(2)CO_(3)+Sito Na_(2)SiO_(3)+C` |
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| 29. |
complete the following reactions: a.overset (C_(6)H_(6) + MeCOCI) underset (Benzene (A)) overset (AICI_(3)) rarr B overset (HNO_(3)) underset H_(2)SO_(4)) rarr C overset (NaBH_(4)) rarr D overset (H_(2)SO_(4)) underset (Delta) rarr E b.(B) overset (NaBH_(4)) rarr F overset (H_(2)SO_(4)) underset (Delta) rarr G overset (HNO_(3)) underset (H_(2)SO_(4)) rarr H |
Answer» SOLUTION :a.  B. 
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| 30. |
Complete the following reactions : (a) (NH_(4))_(2)Cr_(2)O_(7)overset(Heat) (b) I^(-)+O_(3)+H_(2)O to |
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Answer» Solution :(a) `underset("dichromate")underset("Ammonium")((NH_(4))_(2)Cr_(2)O_(7))overset("Heat")N_(2)+4H_(2)O+underset("oxide")underset("CHROMIUM")(Cr_(2)O_(3))` (B) `I^(-)+O_(3)+H_(2)O to 2OH^(-)+I_(2)+O_(2)` |
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| 31. |
Complete the following reactions: (a) CH_(3)-CH=CH_(2)+"CCl"_(4)overset("Peroxide")rarr? (b) H_(2)C=CH-(CH_(2))_(5)-CH_(3)+CHCl_(3)overset("Peroxide")rarr? |
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Answer» Solution :(a) `CH_(3)-UNDERSET(CL)underset(|)"C"H-CH_(2)-"CCL"_(3)` (b) `underset("1,1,1-Trichlorononane")("CCl"_(3)-(CH_(2))_(7)-CH_(3))` |
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| 32. |
Complete the following reactions: a. B(OH)_(3)+NH_(3)to (b) Na_(2)B_(4)O_(7)+H_(2)SO_(4)+H_(2)Oto c. B_(2)H_(6)+2NaOH+2H_(2)Oto (d) B_(2)H_(6)+CH_(3)OHto (e) BF_(3)+9H_(2)O (f) HCOOH+H_(2)SO_(4)to (g) SiCl_(4)+NH_(3)to (h) SiCl_(4)+C_(2)H_(5)OHto (i) B+NaOHto (j) H_(2)B_(4)O_(7)overset("Red hot")(to) |
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Answer» Solution :a . `B(OH)_(3)+NH_(3)overset(Delta)(to)UNDERSET(("Boron nitride"))(BN)+3H_(2)O` b. `Na_(2)B_(4)O_(7)+H_(2)SO_(4)+5H_(2)Oto underset(("Boric acid"))(4H_(3)BO_(3))+2Na_(2)SO_(4)` c.`B_(2)H_(6)+2NaOH+2H_(2) O to underset(("Sodiummeteborate"))(4NaBO_(2))+6H_(2)` (d) `B_(2)H_(6)+6CH_(3)OHtounderset(("Trimethyl borate"))(2B(OCH_(3))_(3))+6H_(2)` e. `4BF_(3)+9H_(2)Oto underset(("BOric acid"))(4H_(3)BO_(3))+3H^(+)+3[BF_(4)]^(-)` f. `HCOOH+H_(2)SO_(4)to underset (("Carbon MONOXIDE"))(CO)+H_(2)O+H_(2)SO_(4)` g. `SiCl_(4)+NH_(3)underset("ether")(330K)(to) Cl_(3)Si -underset(("Chlorosizalanes"))(NH)-SiCl_(3)` h. `SiCl_(4)+C_(2)H_(5)OH to underset(("Tetraethoxy silane"))(Si(OC_(2)H_(5))_(4)+2Cl_(2)` (i) `2B+6NaOHto underset(("SODIUM borate"))(2B_(2)O_(3))+H_(2)O` j. `H_(2)B_(4)O_(7) overset("Red HOT")(to)underset(("Boric anhydride"))(2B_(2)O_(3))+H_(2)O` |
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| 33. |
Complete the following reactions : (a) B(OH)_(3) + NH_(3) rarr (b) Na_(2) B_(4) O_(7) + H_(2) SO_(4) + H_(2) O rarr |
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Answer» Solution :(a) `B(OH)_(3) + NH_(3) overset(Delta)rarr underset("(Boron nitride)")(BN) + 3H_(2)O` (b) `Na_(2) B_(4) O_(7) + H_(2) SO_(4) + 5H_(2)O rarr underset("(Boric ACID)")(4H_(3)BO_(3)) + 2Na_(2) SO_(4)` |
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| 34. |
Complete the following reactions: a. b. c. d. e. f. g. h. i. |
Answer» Solution :a.  B.  c.  d. `R_(2)CuLi` does not add to `(C=O)` bond but couples.  e. This is an example of `1,4-`ADDITION or conjugate addition to an `alpha,BETA-`unsaturated carbony1 compound.  f. It is an example of partial oxidation of `(CH_(3))` to `(-CHO)` (Etard type reaction). Only terminal `CH_(3)` is oxidised to `(-CHO)`.  Formation of acetral ester prevents further oxidation of the intermediate aldehyde to acid `(-COOH)` group. g.  h. It is an example of Gattermann-Koch synthesis. The reaction TAKES place at `rho-`position.  i. 
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| 35. |
Complete the following reactions: a. b. c. d. e. f. g. |
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Answer» Solution :a. Under these reaction conditions, the CN is not HYDROLYSED to `COO^(Θ)`. b.  C.  d.  e.  f.  g.First, `H^(o+)` adds to `(C=O)` and not to `(C=C)`, to GIVE a resonance stabilised carbocation. 
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| 36. |
Complete the following reactions: a. b. c. d. e. f. g. |
Answer» Solution :for the reacation of `Sia_(2)BH` (di-sec-isoamy1 borane or di-sec-isomay1 BORON hydride)  . It converts `(C-=C)` to `(C=C)` bondand `(C=C)` bond to `(C-C)` but attacks at less-hindered side, it gives anti-Markovnikovproducts and synaddition, e.G.,  a.  b.  c.  d.  e.  f.  g. 
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| 37. |
Complete the following reactions: a. b. c. d. e. |
Answer» SOLUTION :a. It is an EXAMPLE of Witting reaction.  b.  c.  d. It is Witting-type reaction and PROCEEDS via SULPHUR YLIDE.  e.It is a Witting-type reaction and proceeds via sulphur ylide. 
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| 38. |
Complete the following reactions: a. b. c. d. |
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Answer» Solution :a. Four products are obtained. i.Intramolecular Cannizzaro reaction of (A):  II. ALDOL condensation of (B): a.  b.  3. a. Claisen-Schmidt reaction of (A) and (B):  b.  c.Moist `Ag_(2)O` gives AgOH which acts as an oxidising AGENT and oxidises `(-CHO)` group to `(-COOAG)`, the other `(COOH)` group also CHANGES to `(-COOAg)`, which then undergoes Hunsdiecker reaction.  d. 
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| 39. |
Complete the following reactions: (a) (b) |
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| 40. |
Complete the following reactions: a.2Me_(3)C--Br overset (Ag_(2)CO_(3)) underset (Delta) rarr (A) b.MeOH + MeCH=O + HCI (g) rarr (B) c.MeOH + H_(2)C=O + HCI (g) rarr (C) d. |
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Answer» Solution :a.`A = Me_(3)C--O--Me_(3)` (Di-t-butyl ether) `AG^(o+)` reacts with `Br^(o+)` leaving `Me_(3)C^(o+)` which reacts with `CO_(3)^(2-)` to give `Me_(3)C--OCO_(2)^(-)`. The latter loses `CO_(2)` leaving `Me_(3)CO^(-)` which reacts with `Me_(3)C^(o+)` to give the product. DUE to steric hindrance, the yield is less. MECHANISM :  b.  c.  d.It is an example of Friedel-Crafts type addition to a double bond.  e.It is an example of organometallic coupling reaction. |
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| 41. |
Complete the following reactions: a. Alcohol (A) overset(Reag ent)underset(B)(rarr) b. Alkyne (D) overset(Reag ent)underset(E)(rarr) Product(C) c. Acid chloride (F) overset(Reag ent)underset(G)(rarr)Product(C) d. Acid(H) overset(Reag ent)underset(I)(rarr)Product (C) e. Nitro compound (J)overset(Reag ent)underset(K)(rarr) Product(C) f. Alkyl nitrile (L) overset(Reag ent)underset(M)(rarr) Product(C) |
Answer» Solution :a.  b.  C.  `2MeLi + CuI OVERSET(Delta)RARR Me_(2)CuLi+LiI`  d.  e. N/A  F. 
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| 42. |
Complete the following reactions: a. |
Answer» SOLUTION :  In (A), Clemmensen reduction is acid catalysed, therefore dehydration ALSO TAKES place. In (B), Wolff-Kishner reduction is base catalysed, so DEHYDROHALOGENATION also takes place. |
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| 43. |
Complete the following reactions. 6CHO +4NH_3 rarr |
| Answer» SOLUTION :`6CHO 4NH_3 RARR (CH_2)_6N_4 +6H_2O` | |
| 44. |
Complete the following reactions: |
Answer» SOLUTION :
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| 45. |
Complete the following reaction: 6HCHO +4NH_3 rarr |
| Answer» SOLUTION :`6CHO 4NH_3 RARR (CH_2)_6N_4 +6H_2O` | |
| 46. |
Complete the following reactions? '4Al+3O_2 |
| Answer» SOLUTION :`4Al+3O_2rarr2Al_2O_3` | |
| 47. |
Complete the following reactions: |
Answer» SOLUTION : 
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| 48. |
Complete the following reactions : 4Al + 3O_2 to |
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Answer» SOLUTION :The reaction are given as under : Al combines with `O_2` to FORM alumina. `4Al + 3O_2 OVERSET("HEAT")to 2Al_2O_3` |
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| 49. |
Complete the following reactions |
Answer» SOLUTION : 
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| 50. |
Complete the following reactions: |
Answer» SOLUTION :
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