Solution - Career Point

10. Which of the following is/are correct ?(A) The efficiency of a solid catalyst dependsupon its surface area(B) Catalyst operates by providing alternate pathfor the reaction that involves lower activationenergy(C) Catalyst lowers the activation energy offorward reaction only without affecting theactivation energy of backward reaction(D) Catalyst does not affect the overall enthalpychange of the reaction11. For the three elements P, Q & R, ionizationenthalpy (IE) and electron gain enthalpies (∆ eg H)are given in the following table -Element IE in kJ/mol ∆eg H in kJ/molP 1680 –340Q 1100 –120R 500 –20(A) P is the highest electronegative elementamong P, Q and R(B) R is the least electronegative among P, Q & R(C) Electro negativity of P is approximately equal to 4(D) R may be chlorine12. Which of the following is/are correct ?⎛ dH ⎞(A) For the incompressible liquid ⎜ ⎟⎠⎝ dPapproximately equal to volume of liquid⎛ dH ⎞(B) For ideal gas ⎜ ⎟⎠ is equal to zero⎝ dP(C) For real gas if⎛ dH ⎞necessarily ⎜ ⎟⎠⎝ dP(D) None of theseTT⎛⎜⎝dE ⎞ ⎟⎠dVSECTION – IIIComprehension TypeTis equal to zeroTis= 0 then notThis section contains 2 groups of questions. Each grouphas 3 multiple choice questions based on a paragraph.Each question has 4 choices (A), (B), (C) and (D) for itsanswer, out of which ONLY ONE is correct.Paragraph # 1 (Ques. 13 to 15)A pleasant smelling optically active compound,monoester 'F' has molecular weight 186. It doesn'treact with Br 2 in CCl 4 . Hydrolysis of 'F' gives twooptically active compounds 'G', which is soluble inNaOH and 'H'. H gives a positive iodoform test, buton warming with conc. H 2 SO 4 gives I with nodisastereomers. When the Ag + salt of 'G' is reactedwith Br 2 , racemic 'J' is formed. Optically active J isformed when 'H' is treated with tosyl chloride (TsCl),and then with NaBr.13. The pleasant smelling optically active compound, Fis -(A) (CH 3 ) 2 CH– CHCO– || O– CH – CH(CH 3 ) 2| |CH 3CH 3O(B) (CH 3 ) 3 C–CH 2 C || –O– CH – CH(CH 3 ) 2|CH 3O(C) CH 3 CH 2 CH 2 CH – C || –O– CH – CH 2 CH 2 CH 3||CH3CH 3O||CH CH 2 – COCH2– CHCH 2 –CH 3(D) CH 3 CH 2 –|CH3|CH14. How would be the structure of F if I exists asdiastereomers ?O(A) (CH 3 ) 2 CH CHCO|| CHCH (CHCH | 3)23 CH| 3(B) (CH 3 ) 3 CCH 2 COO|| CHCH (CH| 3)2CH3O(C) CH 3 CH 2 CH 2 CHCO||CH| CHCH 2 2 33 CH| CH CH3(D) CH 3 CH 2 CHCH2C | COOCH || 2 CHCH 2H3CH| CH333XtraEdge for IIT-JEE 54APRIL 2010