May 2011 - Career Point

SECTION – IVMatrix match TypeThis section contain 2 questions. Each question hasfour statements (A, B, C and D) given in column I andfive statements (p, q, r, s and t) in column II. Any givenstatement in column I can have correct matching withONE or MORE statement (s) given in Column II. Forexample, if for a given question, statement B matcheswith the statements given in q and r, then for theparticular question, against statement B, darken thebubbles corresponding to q and r in the ORS19. Match the transformation in column I withappropriate options in column IIColumn-I(A) CO 2 (s) → CO 2 (g)(B) CaCO 3 (s) → CaO(s) + CO 2 (g)(C) 2H• → H 2(g)(D) P (white solid) → P (red, solid)Column-II(p) phase transition(q) allotropic change(r) ∆H is positive(s) ∆S is positive(t) ∆S is negativeAns. [A → p, r, s; B → r, s; C → t ; D → p, q, t]Sol. [A] CO 2 (s) → CO 2 (g)p, r, s[B] CaCO 3 (s) → CaO (s) + CO 2 (g)r, s[C] 2H•→ H 2(g)t[D] P white → P redp, q, t20. Match the reactions in column I with appropriatetype of steps/reactive intermediate involved inthese reactions as given in column IIColumn-I(A)H 3 CO OO(B)Oaq NaOHCH 2 CH 2 CH 2 ClCH 3 MgIOCH(C)(D)O18CH 2 CH 2 CH 2 OHCH 2 CH 2 CH 2 C(CH 3 ) 2OHH 2 SO 4H 2 SO 4H 3 C CH 3Column-II(p) Nucleophilic substitution(q) Electrophilic substitution(r) Dehydration(s) Nucleophilic addition(t) CarbanionAns. [A → r, t, s; B → p, s, t; C → r, s ; D → r, q]Sol. FactualPHYSICSSECTION – ISingle Correct Choice TypeThis section contains 8 multiple choice questions. Eachquestion has four choices (A), (B), (C) and (D), out ofwhich ONLY ONE is correct.21. A light ray travelling in glass medium is incidenton glass-air interface at an angle of incidence θ.The reflected (R) and transmitted (T) intensities,both as function of θ, are plotted. The correctsketch is :(A)(B)100%Intensity100%Intensity00TRTRθ 90ºθ 90º18OXtraEdge for IIT-JEE 84 MAY 2011