Old Exam Papers June 2012 (Set 2)

c h and
2
(ii) Write confirmatory test for carbonate CO3 sulphide S 2 c h radicals. 5
2 dkcksZusV o lYQkbM ewydksa ¼ CO o 2
3 S ½ ds fy,
fu'p;kRed ijh{k.k fyf[k;sA 5
2. What is equilibrium constant K ? Write equilibrium constants
for following reactions :
(i) N 2 + 3H 2 2NH 3
(ii) PCl 5 PCl 3 + Cl 2
(iii) Ca +2 + 2OH
(iv) H SO 2H 2 4 +
+ SO4 Ca (OH) 2
lkE; fLFkjkad K D;k gksrk gS \ fuEu vfHkfØ;kvksa ds lkE;
fLFkjkad fyf[k;s %
(i) N 2 + 3H 2 2NH 3
(ii) PCl 5 PCl 3 + Cl 2
(iii) Ca +2 + 2OH
2
Ca (OH) 2
(iv) H SO 2H 2 4 +
+ SO4 200 2 BCH
2
10
10
8. (i) Name the elements of group-18 (noble gases). Write
their electronic configurations. Comment on their
chemical activity. 6
lewg-18 ds rÙoksa ds uke o bysDVªkWfud foU;kl fyf[k;sA
budh jklk;fud lfØ;rk ij fVIi.kh dhft;sA
6
(ii) Name the elements of group-17 (halogens). What is
the trend of change in atomic radii and
electronegativity in this group ? 4
lewg-17 ¼gSykstsu½ ds rÙoksa ds uke fyf[k;sA bl lewg
esa uhps pyus ij ijekf.od vkdkj o fo|qr_.krk esa
fdl izdkj ifjorZu gksrk gS \ 4
9. Explain Sp, SP 2
, Sp 3
and Sp 3
d hybridization by taking suitable
examples. 10
Sp, SP 2
, Sp 3
o Sp3d
ladj.kksa dks mi;qä mnkgj.kksa dh lgk;rk
ls le>kb;sA 10
10. Write short notes on the following :
(i) Valence bond theory
(ii) Molecular orbital theory
(iii) Bond energy
BCH 5 PTO
10