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Aldehydes and    Ketones: Online Test quiz in Javascript Theories of Covalent Bonding and Shapes of Molecules Quiz Test Exams Question of Next Good Try! You Got out of answers correct! That's TryAgain     Back to Main Page

  1. The carbon atom of carbonyl group is: a) sp hybridized b) sp 2 hybridized c) sp 3 hybridized d) none of these ... Answer is b) Explanation: Carbonyl carbon posesses trigonal planer geometry with bond angle of 120 O , which is only possible when carbon is sp 2 hybridized. show Answer 2. Ketones are prepared by the oxidation of a) primary alcohol b) secondary alcohol c) tertiary alcohol d) none of these ... Answer is b) Explanation: In secondary alcohol, -OH group is bonded with that carbon that is further bonded with two carbon atoms. During oxidation of secondary alcohol, one hydrogen is removed from OH group and another hydrogen is removed from carbon atom bonded with OH group, so resultant product is a ketone. show Answer 3. Acetone reacts with HCN to form an cyanohydrins. It is an example of a) electrophilic addition b) electrophilic substitution c) nucleophilic addition ...

Aldehydes and Ketones: Short question & answer, mechanism of nucleophilic addition Question: How is formaldehyde prepared industrially? Answer. On industrial scale, formaldehyde is prepared  by passing the mixture of methanol vapors and air over iron  molybdenum oxides or silver as a catalyst. The reaction is carried out at the temperature of 500 ˚C. Question: Describe briefly the nucleophile addition mechanism  to carbonyl compound. Answer. Nucleophilic addition mechanism to carbonyl compound is two types. i. Base catalyzed Nucleophilic addition reaction ii. Acid catalyzed Nucleophilic addition reaction i. Base catalyzed Nucleophilic addition reaction In the base catalyzed Nucleophilic addition reaction, following steps are involved. Step 1: Generation of strong nucleophile. Step 2: Attack of Nucleophile on electrophilic carbon Step 3: Abstraction of proton and regeneration of base ii. Acid catalyzed nucleophilic addition reaction In the acid catalyzed nucleophi...