aldehydes and ketones

Question 1

the general formula of carbonyls

Answer 1

CnH2nO

Question 2

conditions for the preparation of formaldehyde by laboratory method

Answer 2

300 degrees celsius
Pt asbestos
or Ag or Cu

Question 3

composition of formalin

Answer 3

formaldehyde 40%
water 52%
unreacted methanol 8%

Question 4

using laboratory method formaldehyde can be prepare by

Answer 4

methanol

Question 5

conditions to prepare formaldehyde using industrial method

Answer 5

500 degrees Celsius
FeO2 Mo2O3
or Ag

Question 6

conditions for acetaldehyde preparation using laboratory method

Answer 6

Na2Cr2O7
Conc. H2SO4

Question 7

why acetaldehyde is immediately distilled during its preparation by using laboratory method

Answer 7

to avoid its further oxidation which can convert it into carboxylic acid

Question 8

conditions for the preparation of acetaldehyde using industrial method

Answer 8

PdCl2 as catalyst
CuCl2 as promoter

Question 9

dry distillation of calcium formate form

Answer 9

formaldehyde

Question 10

dry distillation of calcium acetate form

Answer 10

acetone

Question 11

dry distillation of a mixture of calcium formate and calcium acetate form

Answer 11

Acetaldehyde / formaldehyde/ acetone

Question 12

during dry distillation of a mixture of calcium acetate and calcium, the interaction between two acetates form

Answer 12

acetone

Question 13

during dry distillation of a mixture of calcium acetate and calcium, the interaction between two formates form

Answer 13

formaldehyde