Aldehydes and Ketones — practice questions
71 curated practice questions from Aldehydes and Ketones (Chemistry JEE Advanced, NTA Exams) — 71 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- The order of reactivity of phenyl magnesium bromide with the following compounds is (2004) array l (I) (II) (III) array
- Which of the following species is (are) not intermediate in the aldol condensation of acetaldehyde (ethanal) in aqueous…
- Reaction of acetylene and propylene with HgSO 4 in presence of H 2 SO 4 produces respectively
- major product is (2003)
- Two aliphatic aldehydes P and Q react in the presence of aqueous K 2 CO 3 to give compound R, which upon treatment with…
- Which of the following does not give brick red precipitate with Fehling solution
- When a nucleophile attacks a carbonyl compound, the one which is most reactive towards the nucleophile is
- The reagent that gives an orange coloured precipitate with acetaldehyde
- Which of the following has the most acidic hydrogen ? (2000)
- CH 3 CHO + CH 3 MgBr → Product H _ 2 O A. What is A?
- Match the compounds/ions in Column-I with their properties/reactions in Column-II. (2007) array ll & Column-I (A) C _ 6…
- Which of the following gases when passed through warm dilute solution of H 2 SO 4 in presence of HgSO 4 gives…
- Compound A (molecular formula C 3 H 8 O) is treated with acidified potassium dichromate to form a product B (molecular…
- How will you convert butan-2-one to propanoic acid ? (2005)
- Match each of the compounds given in column I with the reaction (s) that they can undergo, given in column II. (2014)
- The product(s) obtained via oxymercuration (HgSO 4 + H 2 SO 4 ) of 1-butyne would be
- Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the…
- Clemmensen reduction involves > C = O to > CH 2 in presence of
- A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to…
- Which of the following products is formed when benzaldehyde is treated with CH _ 3 MgBr and the addition product so…
- The reagent with which both aldehyde and acetone react easily is
- An organic compound ‘A’ has the molecular formula C 3 H 6 O. It undergoes iodoform test. When saturated with HCl it…
- Two aliphatic aldehydes P and Q react in the presence of aqueous K 2 CO 3 to give compound R, which upon treatment with…
- A compound has a vapour density of 29. On warming it with an aqueous solution of alkali I 2 , it gives a yellow…
- The reaction of compound P with CH 3 MgBr(excess) in (C 2 H 5 ) 2 O followed by addition of H 2 O gives Q. The compound…
- In Wolf-Kishner reduction, the carbonyl group of aldehydes and ketones is converted into
- The oxidation of toluene to benzaldehyde by chromyl chloride is called
- The end product in the following sequence of reaction is HC CH [20 H _ 2 SO _ 4 ] 1 HgSO _ 4 ~A CH _ 3 MgX ~B [ O ]
- Assertion (A) : Reimer-Tiemann reaction is used to prepare benzaldehyde from phenol. Reason (R) : Reimer-Tiemann…
- Aldehydes undergo disproportionation reaction in presence of aqueous NaOH. Simultaneous oxidation and reduction of a…
- From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?
- Mixture of C 6 H 5 CHO and HCHO is treated with NaOH then Cannizzaro’s reaction involves :
- The structure would be best classified as a(n)
- The major product of the following reaction is (2015)
- When enolate A is compared with enolate B array l (A) (B) array which of the following statements is true ?
- The smallest ketone and its next homologue are reacted with NH 2 OH to form oxime (2006)
- The appropriate reagent for the following transformation (2000) is
- Aldehydes and ketones can be reduced to corresponding hydrocarbons by
- Two aromatic compound C 8 H 8 O (X) and C 8 H 10 O (Y) are treated with sodium hypochlorite separately. The products…
- Match the following :
- CH _ 3 - CH _ 2 - C CH [ H _ 2 O ] R Butanone, R is
- The key step in cannizzaro’s reaction is the intermolecular shift of
- Aldehydes undergo disproportionation reaction in presence of aqueous NaOH. Simultaneous oxidation and reduction of a…
- Which one of the following on treatment with 50 per cent aqueous sodium hydroxide yields the corresponding alcohol and…
- In the following reaction sequence, the correct structures of E, F and G are (2008)
- A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives (2001)
- OCH - CHO OH ^ - HOH _ 2 C - COOH The reaction given is
- Which of the following forms of an enol to the greatest extent ?
- (2005) the compound (X) is
- A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to…
- The structures of compounds J and K, respectively, are (2008)
- Which of the following compounds gives internal crossed Cannizzaro’s reaction ?
- Product in following reaction is CH 3 MgI + HCHO → Product
- When a nucleophile encounters a ketone, the site of attack is
- Which one of the following compounds is most reactive towards nucleophillic addition?
- The compound is
- Which of the following compounds undergo aldol condensation?
- Assertion : Lower aldehydes and ketones are soluble in water but the solubility decreases as the molecular mass…
- Which one of the following compounds is prepared in the laboratory from benzene by a substitution reaction
- The most reactive compound towards formation of cyanohydrin on treatment with KCN followed by acidification is
- Assertion (A) : Aldehydes form stable hydrates. Reason (R) : Aldehydic carbonyl is less electron deficient than the…
- Match the following
- ( CH _ 3 )_ 2 CO [( HCl )] NaCN ~A H _ 3 O ^ + B in the above sequence of reactions, A and B are
- The cyanohydrin of a compound X on hydrolysis gives lactic acid; the X is
- Which of the compound shown is (are) correctly named as pentane derivates, either as pentanals or pentanones? array l…
- The structure of the product I is (2008)
- The structure of product L is (2008)
- In the following reaction, product P is P
- A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to…
- The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is
- The structure of the product is