Each question contains statements given in two columns, which have to be matched. The statements in Column-I are labelled A, B, C and D, while the statements in Column-II are labelled p, q, r, s and t. Any given statement in Column-I can have correct matching with ONE OR MORE statement(s) in Column-II. The appropriate bubbles corresponding to the answers to these questions have to be darkened as illustrated in the following example :
If the correct matches are A-p, s and t; B-q and r; C-p and q; and D-s then the correct darkening of bubbles will look like the given.
Q.1. Match the chemical substances in Column I with type of polymers/type of bonds in Column II. (2007)
Column I Column II
(A) cellulose (p) Natural polymer
(B) nylon-6, 6 (q) Synthetic polymer
(C) protein (r) Amide linkage
(D) sucrose (s) Glycoside linkage
Sol. (A) : (p) an d(s) Cellulose is a natural polymer and has a C1 – C4 b-glycosidic linkage.
(B) : (q) and (r) Nylon -6, 6 is a syn thetic polymer of hexamethylenediamine and adipic acid and has amide linkages.
(C) : (p) and (r) Proteins are natural polymers of a amino acids joined by amide linkages (peptide bonds).
(D) : (s) Sucrose is a disaccharide of a-D glucose and b-D-fructose and has an a, b-glycosidic linkage.
Q.2. Match the reaction in Column I with appropriate options in Column II. (2010)
| ||(p) Racemic mixture|
| ||(q) Addition reaction|
| ||(r) Substitution reaction|
| ||(s) Coupling reaction|
(t) Carbocation intermediate
Ans. (A) - r,s ; (B) - t ; (C) - p,q ; (D) - r
Sol. (A) – (r), (s) ; (B) – (t) ; (C) – (p), (q) ; (D) – (r)