Correct Answer:- Option-D
Question75:-The point group symmetry of the staggered form of ethane molecule is :

Correct Answer:- Option-B
Question76:-The plane symmetry is also called :
A:-?-plane
B:-?-plane
igma* -plane
D:-?-plane
Correct Answer:- Option-C
Question77:-Which of the following heterocyclic compound is not aromatic ?
A:-Pyridine
B:-Pyrrole
C:-Furan
D:-Piperidine
Correct Answer:- Option-D
Question78:-Free radicals are detected by the :
A:-Mass spectra
B:-U.V. spectra
C:-CIDNP
D:-Mossbauer spectra
Correct Answer:- Option-C
Question79:-A class of pericyclic reaction is :
A:-Hydroboration reaction
B:-Reimer - Tiemann reaction
C:-Grignard reaction
D:-Diels - Alder reaction
Correct Answer:- Option-D
Question80:-In the R-S notation, the prefixes R and S stands for :
A:-Rectus-Simiantus
B:-Rectus-Sinister
:-Rotamer-Simiantus
D:-Rotamer-Sinister
Correct Answer:- Option-B
Question81:-Which among the following will be paramagnetic ?
A: Cr(CO)_6 >>
`೯6(೦೦)_5: ``
Fe_2(CO)_9°
0:- (0) 6
Correct Answer:- Option-D

Question82:-The difference between the potential of the electrode when the gas evolution was actually observed and the
theoretical reversible value of the same solution was called :

A:-Electrode potential
-Over potential
C:-Decomposition potential
D:-None of these
Correct Answer:- Option-B
Question83:-In atomic absorption spectroscopy the addition of Sr or La reduce the contents of :

3-
ae Poy.

801م
‎മ്‌‏
‎D:-Si‏
‎Correct Answer:- Option-A‏
‎Question84:-The crystal field splitting energy for octahedral(o) and tetrahedral complex( ) is related as :‏