NARAYANA IIT ACADEMY JEE MAIN â 2013 - Narayana Group
NARAYANA IIT ACADEMY JEE MAIN â 2013 - Narayana Group
NARAYANA IIT ACADEMY JEE MAIN â 2013 - Narayana Group
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
34 8<br />
6.6210 310 18<br />
3<br />
<br />
7<br />
1.214<br />
10 m<br />
2.17810<br />
<br />
4<br />
52. Compound (A), C8H9Br , gives a white precipitate when warmed with alcoholic AgNO<br />
3.<br />
Oxidation of (A) gives an acid (B), C8H6O 4. (B) easily forms anhydride on heating. Identify<br />
the compound (A).<br />
(1)<br />
Ans. (4)<br />
CH Br<br />
2<br />
CH 3<br />
(2)<br />
C H 2 5<br />
Br<br />
(3)<br />
CH Br<br />
2<br />
CH 3<br />
(4)<br />
CH Br<br />
2<br />
CH 3<br />
Aryl bromide cannot give ppt. as aryl cations are unstable.<br />
53. Four successive members of the first row transition elements are listed below with atomic<br />
0<br />
numbers. Which one of them is expected to have the highest E 3 2 <br />
(1) Cr(Z = 24) (2) Mn(Z = 25) (3) Fe(Z = 26) (4) Co(Z = 27)<br />
Ans. (4)<br />
As it is expected on the basis of electronic configuration.<br />
3 2<br />
Mn e Mn more stable<br />
4 0 5 0<br />
3d 4s 3d 4s <br />
<br />
<br />
(as it is completely half filled subshell)<br />
However experimental data suggests that<br />
3 2<br />
o<br />
3<br />
2 Co e Co ,E is greater than other M / M couples.<br />
54. How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of<br />
1 to create an aqueous solution with pH of 2?<br />
(1) 0.1 L (2) 0.9 L (3) 2.0 L (4) 9.0 L<br />
<strong>NARAYANA</strong> <strong>IIT</strong> <strong>ACADEMY</strong> <strong>JEE</strong> <strong>MAIN</strong> – <strong>2013</strong><br />
M /M
Change language