Carbonyl compunds

Question 1

LiAlh4 reduces Aldehyde and ketone into?

Answer 1

1-alcohol and 2-alcohol respectively

Question 2

1 mole of Lialh4 gives

Answer 2

4 moles of aldehydes and ketones

Question 3

Which groups are not affected by LiAlH4?

Answer 3

C=C and C≡C

Question 4

CH3-CHO ————> in presence of LiAlH4 ——–>?

Answer 4

CH3-CH2OH

Question 5

CH2=CH-CHO IN PRESENCE OF LiAlH4 ———>?

Answer 5

CH2-CH-CH2OH

Question 6

NABH4 reduces Aldehyde and ketone into?

Answer 6

1-alcohol and 2-alcohol respectively

Question 7

Which groups are not affected by NABH4?

Answer 7

C=C and C≡C, -COOH, -COOR

Question 8

NI + H2 reduces Aldehyde and ketone into?

Answer 8

1-alcohol and 2-alcohol respectively

Question 9

Which groups are not affected by NI + H2?

Answer 9

——————— (C=C AND C≡C GETS AFFECTED)

Question 10

What do Zn+Hg and Con. Hcl, do?

Answer 10

covert -c=o to -ch2 and -no2 to -nh2

Question 11

ex:- HCHO + Zn-Hg——->?

Answer 11

CH4

Question 12

How does Zn-Hg convert alcohol into?

Answer 12

-Ch2oh —–> - CH2Cl

Question 13

What do N2H4 + KOH + Glycerol, do?

Answer 13

covert -c=o to -ch2

Question 14

What is the mechanism of reaction with N2H4 + KOH + Glycerol?

Answer 14

In this reduction, carbonyl compound is fist converted into hydrazine and then to hydrocarbon

Ex:- -C=O + NH2-NH2———> -C-N-N-H2 ———-> -CH2

Question 15

What acts as a Dehydrohalogenating agent?

Answer 15

KOH + glycerol

ex:- Ch3-Ch-cl-Cho ———> Ch3-ch=ch-ch3

Question 16

What do Red P + HI, do?

Answer 16

covert -c=o to -ch2

Question 17

What is an aldol?

Answer 17

the product that contains both aldehydes and ketones

Question 18

What is aldol condenstation rxn?

Answer 18

Aldol or ketol on heating gives alpha-beta-unsaturated carbonyl compound

Question 19

What reaction is aldol condensation reaction and what is the intermediate?

Answer 19

Nucleophilic addition reaction and intermediate is carboanion

Question 20

CH3-CHo +Ch3-ChO ———-> ?

Answer 20

CH3-CH=Ch-CHo

Question 21

CH3-CH=Ch-CHo ————> Nabh4
H2/Pd/C
H2/NI/heat

Answer 21

Ch3-CH=Ch-CH2oh
CH3-CH2-CH2-CHo
C-C-C-Ch2OH

Question 22

CH3-CHO + CH3-CH2_CHO ——>? (OH/heat)

Answer 22

CH3-CH=C-CH3-CHO

Question 23

What id claisen-schimdt reaction?

Answer 23

Croessed aldol condensation between aromatic aldehyde and aliphatic ketone or mixed ketones

This reaction is catalysed by base

Question 24

C6H5-CHO +CH3-C=O-CH3————>(oh/heat)

Answer 24

C6H5-CH=CH-C=O-C6H5

Question 25

What are the catalyst and product of perkin rxn?

Answer 25

3-Amine or sodium or potassium salt of anhydride

Product is alpha-beta unsaturated acid

Question 26

What are the steps involved in Perkin rxn?

Answer 26

1. Nucleophilic addition of aromatic aledhyyde with acid anhydride
2. Dehydration
3. Hydrolysis