1231. Line spectrum is the characteristic properties of substance in __________state :

A. Gaseous *
B. Liquid
C. Solid
D. Crystalline

1232. The number of spectral lines obtained when an electron Jumped From 5th to 1st Bohr Orbit :

A. 3
B. 10 *
C. 11
D. 12

1233. Numbers of orbitals in 3rd shell are :

A. 3
B. 6
C. 9 *
D. 18

1234. Total number of nodes in 5s orbitals are :

A. 5
B. 4 *
C. 3
D. 2

1235. Among the following, the electron deficient compound is :

A. BCl3 *
B. CCl4
C. PCl5
D. CH4

1236. In which of the following Compounds the bond angle will be maximum :

A. NH3
B. N+H4
C. PCl3
D. BeCl2 *

1237. Which of the molecule has trigonalplanar geometry :

A. BF3 *
B. NH3
C. PCL3
D. SO2

1238. Which of the following is not ISO-structural to SiF4:

A. SiCl4
B. +NH4
C. So42
D. C2H4 *

1239. CO2 is iso-structural to :

A. SO2
B. SNcl2
C. +NO2 *
D. C2H4

1240. Pi-Bond is formed by __________overlap:

A. S-S
B. S-P
C. Linear P-P
D. Parallel P-P *