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 *