Advertisements
Advertisements
प्रश्न
How will you convert ethanal into the following compound?
But-2-enoic acid
Advertisements
उत्तर
\[\ce{\underset{Ethanal}{2CH3CHO}->[dil.NaOH][Aldol condensation ]\underset{but-2-enal}{CH3CH = CHCHO}->[Ag(NH3)^+2OH-][Tollens' reagent]\underset{But-2-enoic acid}{CH3CH = CHCO2H}}\]
APPEARS IN
संबंधित प्रश्न
Distinguish between: CH3COOH and HCOOH
Give a simple chemical test to distinguish between the following pair of compounds :
CH3CH2CHO and CH3CH2COCH3
Give a simple chemical test to distinguish between the following pair of compounds:
Benzoic acid and Ethyl benzoate
Alkenes decolourise bromine water in presence of CCl4 due to formation of ______.
Which of the following compounds gives a positive Tollen's test but negative Fehling's test?
Solvent used for dewaxing of petroleum products are
Acetaldehyde cannot show?
Fehilng's test is positive for
Which of the following tests/reactions is given by aldehydes as well as ketones?
A hydrocarbon (A) with molecular formula C5H10 on ozonolysis gives two products (B) and (C). Both (B) and (C) give a yellow precipitate when heated with iodine in presence of NaOH while only (B) give a silver mirror on reaction with Tollen’s reagent.
- Identify (A), (B) and (C).
- Write the reaction of B with Tollen’s reagent.
- Write the equation for iodoform test for C.
- Write down the equation for aldol condensation reaction of B and C.
Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?
An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent and gives positive iodoform test. The compound is:
The correct set of products obtained in the following reactions:
- \[\ce{RCN ->[reduction]}\]
- \[\ce{RCN ->[(i) CH3MgBr][(ii) H2O]}\]
- \[\ce{RNC ->[hydrolysis]}\]
- \[\ce{RNH2 ->[HNO2]}\]
Choose the reaction which is not possible:
An organic compound 'A' with molecular formula C5H8O2 is reduced to n-pentane with hydrazine followed by heating with NaOH and glycol. 'A' forms a dioxime with hydroxylamine and gives a positive iodoform and Tollen's test. Identify 'A' and give its reaction for iodoform and Tollen's test.
You are given four organic compounds “A”, “B” , “C” and “D”. The compounds “A”, “B” and “C” form an orange-red precipitate with 2, 4 DNP reagent. Compounds “A” and “B” reduce Tollen’s reagent while compounds “C” and “D” do not. Both “B” and “C” give a yellow precipitate when heated with iodine in the presence of NaOH. Compound “D” gives brisk effervescence with sodium bicarbonate solution. Identify “A”, “B”, “C” and “D” given the number of carbon atoms in three of these carbon compounds is three while one has two carbon atoms. Give an explanation for our answer.
