cbsc chemistry pyq 2022 55/4/1
1. Arrange the following compounds in the increasing order of their property indicated : (Any two) (i) Acetaldehyde, Benzaldehyde, Acetophenone, Acetone (Reactivity towards HCN) (ii) (CH 3 ) 2 CHCOOH, CH 3 CH 2 CH(Br)COOH, CH 3 CH(Br)CH 2 COOH (Acidic strength) (iii) CH 3 CH 2 OH, CH 3 CHO, CH 3 COOH (Boiling point) 2. In a plot of Λₘ against the square root of concentration (C 1/2 ) for strong and weak electrolyte, the value of limiting molar conductivity of a weak electrolyte cannot be obtained graphically. Suggest a way to obtain this value. Also state the related law, if any. 3. Write reasons for the following statements : (i) Benzoic acid does not undergo Friedel-Crafts reaction. (ii) Oxidation of aldehydes is easier than that of ketones. SECTION B 4. (a) Write reasons for the following : (i) Ethylamine is soluble in water whereas aniline is insoluble. (ii) Amino group is o- and p-directing in aroma...