27 + Interview Questions in ALDOL-AND-CANNIZARO-REACTION IN GENERAL AWARENESS Page 1 InterviewSolution

1.	Identify the major product P in the following reaction:A. B. C. D.
Answer» Correct Answer - A Intramolecular nucleophilic addtion-elimination reaction place.

Discussion

2.	Q. Structure of A is:A. `H_(2)C=CH-CHO`B. `Ph-CH=CH-CH_(3)`C. `Ph-underset(CH_(3))underset(\|)(C)=CH_(2)`D. `Ph-CH=underset(CH_(3))underset(\|)(C)-CH_(3)`
Answer» Correct Answer - B

Discussion

3.	Compound (X) is obtianed by which of the following reaction?A. B. C. D.
Answer» Correct Answer - A

Discussion

4.	Aldol condensation proceeds by carbon-carbon bond formation between an enolate donor and a carbonyl acceptor. For each of the following aldol products (a thorugh e) select a donor and an acceptor compound from the list at the bottom of the page (compounds A through H). write the letter corresponding to your selection in the appropriate answer box. . Q.
Answer» Correct Answer - a-Donor=C, Acceptor=C;b-Donor=E,Acceptor=D; c-Donor=B,Acceptor=A;d-Donor=G,Acceptor=G;e-Donor=F,Acceptor=B a-Donar=C,Acceptor=C,b-Donar=E,Acceptor=D,c-Donar=B,Acceptor=A,d-Donar=G,Acceptor=G,e-Donar=F,Acceptor=Bs

Discussion

5.	Product (B) is,A. B. C. D.
Answer» Correct Answer - B

Discussion

6.	Aldol condensation proceeds by carbon-carbon bond formation between an enolate donor and a carbonyl acceptor. For each of the following aldol products (a thorugh e) select a donor and an acceptor compound from the list at the bottom of the page (compounds A through H). write the letter corresponding to your selection in the appropriate answer box. . Q.
Answer» Correct Answer - a-Donor=C, Acceptor=C;b-Donor=E,Acceptor=D; c-Donor=B,Acceptor=A;d-Donor=G,Acceptor=G;e-Donor=F,Acceptor=B a-Donar=C,Acceptor=C,b-Donar=E,Acceptor=D,c-Donar=B,Acceptor=A,d-Donar=G,Acceptor=G,e-Donar=F,Acceptor=Bs

Discussion

7.	Aldol condensation proceeds by carbon-carbon bond formation between an enolate donor and a carbonyl acceptor. For each of the following aldol products (a thorugh e) select a donor and an acceptor compound from the list at the bottom of the page (compounds A through H). write the letter corresponding to your selection in the appropriate answer box. .
Answer» Correct Answer - a-Donor=C, Acceptor=C;b-Donor=E,Acceptor=D; c-Donor=B,Acceptor=A;d-Donor=G,Acceptor=G;e-Donor=F,Acceptor=B a-Donar=C,Acceptor=C,b-Donar=E,Acceptor=D,c-Donar=B,Acceptor=A,d-Donar=G,Acceptor=G,e-Donar=F,Acceptor=Bs

Discussion

8.	Aldol condensation proceeds by carbon-carbon bond formation between an enolate donor and a carbonyl acceptor. For each of the following aldol products (a thorugh e) select a donor and an acceptor compound from the list at the bottom of the page (compounds A through H). write the letter corresponding to your selection in the appropriate answer box. . Q.
Answer» Correct Answer - a-Donor=C, Acceptor=C;b-Donor=E,Acceptor=D; c-Donor=B,Acceptor=A;d-Donor=G,Acceptor=G;e-Donor=F,Acceptor=B a-Donar=C,Acceptor=C,b-Donar=E,Acceptor=D,c-Donar=B,Acceptor=A,d-Donar=G,Acceptor=G,e-Donar=F,Acceptor=Bs

Discussion

9.	Aldol condensation proceeds by carbon-carbon bond formation between an enolate donor and a carbonyl acceptor. For each of the following aldol products (a thorugh e) select a donor and an acceptor compound from the list at the bottom of the page (compounds A through H). write the letter corresponding to your selection in the appropriate answer box. . Q.
Answer» Correct Answer - a-Donor=C, Acceptor=C;b-Donor=E,Acceptor=D; c-Donor=B,Acceptor=A;d-Donor=G,Acceptor=G;e-Donor=F,Acceptor=B a-Donar=C,Acceptor=C,b-Donar=E,Acceptor=D,c-Donar=B,Acceptor=A,d-Donar=G,Acceptor=G,e-Donar=F,Acceptor=Bs

Discussion

10.	x=no of compound better hydride donor than `Ph-underset(H)underset(\|)overset(O^(ө))overset(\|)(C)-O^(ө)`A. B. C. D.
Answer» Correct Answer - B::C 2(b,c) (due to electron donating group)

Discussion

11.	Q. Structure of E is:A. B. C. D.
Answer» Correct Answer - C

Discussion

12.	Which of the following is not the product of an intramolecular aldol condensation?A. B. C. D.
Answer» Correct Answer - C (c) is cross aldol product.

Discussion

13.	Aldol condensation proceeds by carbon-carbon bond formation between an enolate donor and a carbonyl acceptor. For each of the following aldol products (a thorugh e) select a donor and an acceptor compound from the list at the bottom of the page (compounds A through H). write the letter corresponding to your selection in the appropriate answer box. . Q. .
Answer» Correct Answer - a-Donor=C, Acceptor=C;b-Donor=E,Acceptor=D; c-Donor=B,Acceptor=A;d-Donor=G,Acceptor=G;e-Donor=F,Acceptor=B a-Donar=C,Acceptor=C,b-Donar=E,Acceptor=D,c-Donar=B,Acceptor=A,d-Donar=G,Acceptor=G,e-Donar=F,Acceptor=Bs

Discussion

14.	the reaction `NaOHoverset (heat)to`, products identify the product.A. B. C. D.
Answer» Correct Answer - C Intramolecular Cannizzaro reaction.

Discussion

15.	Product (A) is:A. B. C. D.
Answer» Correct Answer - A Intermolecular aldol condensation.

Discussion

16.	Which of the following compounds will not undergo cannizaro reaction, when treated with 50% aqueous alkali?A. `Ph-overset(O)overset(\|\|)(C)-H`B. C. `Me_(2)CHCHO`D. `Ph-CH_(2)-CHO`
Answer» Correct Answer - D (c) Exception although it has `alpha`-hydrogen it undergo cannizzaro reaction. (d) `Ph-CH_(2)-CHO` (due to presence of `alpha`-Hydrogen it will not under go cannizzaro reaction).

Discussion

17.	product (A) is,A. B. C. D.
Answer» Correct Answer - C Michael addition+Intramolecular aldol.

Discussion

18.	`underset(C_(7)H_(14))((A))underset(Zn//AcOH)overset(O_(3))to(B)+(C)` Commpound (A) exist in geometrical isomers and (B) gives cannizaro reaction. (A) will beA. `CH_(3)-underset(CH_(3))underset(\|)(C)H-overset(CH_(3))overset(\|)(C)=CH-CH_(3)`B. `(CH_(3))_(3)C CH_(2)-CH=CH_(2)`C. `(CH_(3))_(3)C-CH=CH-CH_(3)`D. `CH_(3)-underset(CH_(3))underset(\|)overset(CH_(3))overset(\|)(C)-CH_(2)-CH=CH_(2)`.
Answer» Correct Answer - C `(CH_(3))_(3)C-underset((A))(CH)=CH-CH_(3)underset(Zn//AcOH)overset(O_(3))to(CH_(3))_(3)underset((B))(C)-CHO+underset((C))(CH_(3)CHO)`

Discussion

19.	The following reaction gives:A. B. C. D.
Answer» Correct Answer - B Cross cannizzaro reaction.

Discussion

20.	`CH_(3)CHOunderset(5^(@)C)overset(10%NaOH)tounderset(Delta)tounderset(Ni)overset(H_(2))to(A):` product (A) of the reaction is,A. propanolB. ethanolC. butanolD. pentanol
Answer» Correct Answer - C `CH_(3)CHO overset(NaOH)toCH_(3)-CH=CH-CHOoverset(H_(2)//Ni)toCH_(3)-CH_(2)-CH_(2)-CH_(2)-OH`

Discussion

21.	`CH_(3)-overset(O)overset(\|\|)(C)-CH_(2)-underset(CH_(3))underset(\|)overset(CH_(3))overset(\|)(C)-CHOoverset(KOH,H_(2)O)to(A)`, product A isA. B. C. D.
Answer» Correct Answer - B Intramolecular aldol reaction.

Discussion

22.	Which of the following reactant on reaction with conc. NaOH followed by acidication gives the following lactone as the product? A. B. C. D.
Answer» Correct Answer - C Intramolecular cannizzaro followed by esterification.

Discussion

23.	Reactant (A) is,A. `CH_(3)-overset(O)overset(\|\|)(C)-(CH_(2))_(5)-overset(O)overset(\|\|)(C)-CH_(3)`B. `CH_(3)-overset(O)overset(\|\|)(C)-(CH_(2))_(4)-overset(O)overset(\|\|)(C)-H`C. `H-overset(O)overset(\|\|)(C)-(CH_(2))_(5)-overset(O)overset(\|\|)(C)-H`D. `CH_(3)-overset(O)overset(\|\|)(C)-(CH_(2))_(4)-CH_(2)-OH`
Answer» Correct Answer - B Intramolecular aldol.

Discussion

24.	Identify the principal product of the following reaction?A. B. C. D.
Answer» Correct Answer - B Intramolecular aldol.

Discussion

25.	Compare enolate A with enolate B. Which of the following statements is true?A. A is more stable than BB. A and B have the same stability.C. B is more stble than AD. No comparison of stability can be made.
Answer» Correct Answer - A `-M` of two carbonyl group stabilize the carbanion.

Discussion

26.	the reactant (A) will beA. B. C. D.
Answer» Correct Answer - A In presence of NaOH intramolecular aldol condensation take place.

Discussion

27.	Benzalacetone is the product of mixed aldol condensation between benzaldehyde `(C_(6)H_(5)CH=O) ` and acetone `[(CH_(3))_(2)C=O]` What is its structure.?A. `C_(6)H_(5)CH=Choverset(O)overset(\|\|)(C)CH_(3)`B. `C_(6)H_(5)CH=C(CH_(3))_(2)`C. `C_(6)H_(5)overset(O)overset(\|\|)(C)CH=CHCH_(3)`D. `C_(6)H_(5)CH_(2)overset(O)overset(\|\|)(C)CH=CH_(2)`.
Answer» Correct Answer - A Enolate of acetone attack as benzaldehyde.

Discussion

Explore topic-wise InterviewSolutions in .

Identify the major product P in the following reaction:A. B. C. D.

Q. Structure of A is:A. `H_(2)C=CH-CHO`B. `Ph-CH=CH-CH_(3)`C. `Ph-underset(CH_(3))underset(|)(C)=CH_(2)`D. `Ph-CH=underset(CH_(3))underset(|)(C)-CH_(3)`

Compound (X) is obtianed by which of the following reaction?A. B. C. D.

Product (B) is,A. B. C. D.

x=no of compound better hydride donor than `Ph-underset(H)underset(|)overset(O^(ө))overset(|)(C)-O^(ө)`A. B. C. D.

Q. Structure of E is:A. B. C. D.

Which of the following is not the product of an intramolecular aldol condensation?A. B. C. D.

the reaction `NaOHoverset (heat)to`, products identify the product.A. B. C. D.

Product (A) is:A. B. C. D.

Which of the following compounds will not undergo cannizaro reaction, when treated with 50% aqueous alkali?A. `Ph-overset(O)overset(||)(C)-H`B. C. `Me_(2)CHCHO`D. `Ph-CH_(2)-CHO`

product (A) is,A. B. C. D.

The following reaction gives:A. B. C. D.

`CH_(3)CHOunderset(5^(@)C)overset(10%NaOH)tounderset(Delta)tounderset(Ni)overset(H_(2))to(A):` product (A) of the reaction is,A. propanolB. ethanolC. butanolD. pentanol

`CH_(3)-overset(O)overset(||)(C)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CHOoverset(KOH,H_(2)O)to(A)`, product A isA. B. C. D.

Which of the following reactant on reaction with conc. NaOH followed by acidication gives the following lactone as the product? A. B. C. D.

Identify the principal product of the following reaction?A. B. C. D.

Compare enolate A with enolate B. Which of the following statements is true?A. A is more stable than BB. A and B have the same stability.C. B is more stble than AD. No comparison of stability can be made.

the reactant (A) will beA. B. C. D.