1241. Which of the following is paramagnetic :
A. O2
B. O2 +
C. O2-
D. All *
1242. Which of the following is not paramagnetic :
A. O2
B. O2 +
C. O2-
D. 02-2 *
1243. Bond order of He2+ is:\
A. 1
B. 2
C. 1/2*
D. 3/2
1244. Bond Order of N2+ is :
A. 3
B. 2
C. 0.5
D. 2.5 *
1245. The planar structure of BF3 can be explained by the fact that B is _________ hybridized:
A. Sp
B. Sp2 *
C. Sp3
D. D2Sp3
1246. What is the Hybridization of central atom in conjugated acid of ammonia :
A. Sp
B. Sp2
C. Sp3 *
D. d2SP2
1247. Hybridization of of sulphur in SO3 is :
A. Sp
B. Sp2 *
C. Sp3
D. d2sp3
1248. Which of the following contain both polar and non polar bonds ?
A. NH4CL
B. HCN
C. CH4
D. H2O2 *
1249. The most polar bond is :
A. C-F *
B. Cl-Cl
C. Br-Br
D. I-I
1250. The highest bond energy is :
A. F-F
B. Cl-Cl *
C. Br-Br
D. I-I