Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202120 Jul 2021Morning ShiftChemistryAldehydes and KetonesActual

Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

Options

  1. A( I ) ,   ( III ) and ( IV ) only
  2. BOnly ( IV )
  3. COnly ( II )
  4. D( III ) and ( IV ) only

Correct answer

C. Only ( II )

Step-by-step solution

Aldehyde, alpha-hydroxy ketone and hemiacetals give positive Tollen's test. Enol which can get converted into aldehyde through tautomerism are also give positive Tollen's test. ( I ) is aldehyde, ( II ) get converted into ketones through tautomerism, ( III ) get converted into aldehyde through tautomerism and ( IV ) is hemiacetal so, ( II ) will not give positive Tollen's test.

Practice Aldehydes and Ketones on Quantrex Academy →

More from Aldehydes and Ketones

Consider the following reaction. The major product (P) formed is: 2026' x ' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ' y ' is the major product obtain 2026' x ' is the product which is obtained by the hydrolysis of prop-1-yne in the presence of mercuric sulphate under dilute acidic medium at 333 K. ' y ' is the product which is obtai 2026Given below are two statements: Statement-I: The condensation reaction between CH₃-CH=O and under optimum pH will produce . Statement-II: The molecule will generate Ph-CH=O in the 2026An organic compound " x " where molar ratio of C, O and H are equal, on treatment with 50 % KOH under reflux followed by acidification produced " y ". The most likely structure of 2026Given below are the four isomeric compounds ( P , Q , R , S ) Identify correct statements from below. A. Q , R and S will give precipitate with 2,4- DNP . B. P and Q will give posi 2026Given below are two statements: Statement I : Cross aldol condensation between two different aldehydes will always produce four different products. Statement II : When semicarbazid 2026Which of the following statements are TRUE about Haloform reaction?: A. Sodium hypochlorite reacts with KI to give KOI. B. KOI is a reducing agent. C. , -unsaturated methylketone ( 2026 Full Aldehydes and Ketones list All JEE Main PYQs