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Which of the following statements is true for the compounds | and II where
| = [CoFg]°~ and ۱ = [NiFg]? ?

A
B
0
D

) Both | and II are paramagnetic

) Both | and II are diamagnetic

) Lis paramagnetic and II is diamagnetic
) Lis diamagnetic and II is paramagnetic

For a complex [Mn(H,0),]** average value of B is calculated to be 782 em! from

the . The value of B for free Mn?* is 960 cm~. The value of nephelauxetic

ratio is

A) Orgel diagram,1.227

B) Orgel diagram, 0.814

C) Tanabe-Sugano diagram, 1.227
)

D) Tanabe-Sugano diagram, 0.814

Hydrous oxide precipitate of aluminium for gravimetric estimation is best made by
A) Addition of urea B) Addition of ethyl oxalate
C) Direct hydrolysis using H*, 1120 D) Direct hydrolysis using OH”, ۳٢٥

An o,f — unsaturated ketone of relative molecular mass 110 has an absorption band

with ಸ್ಟ = 215 nm and <= 10,000. A solution of this showed A = 2 in a 1 cm cell.
Calculate the concentration of the ketone in g/L.
^) 22.104 8) 223105 C) 2x 10°? 2) 22൨0൦5

Consider a column chromatogram with 2 peaks of width 1.11 and 1.21. The retention
time (in minutes) for the first signal is 16.4 and for the second is 17.6. What is the
column resolution ?

A) 1.2 B) 1.07 C) 1.06 D) 1.01

The signal for methylene protons in the proton NMR of benzyl bromide is at 5 4.6 ppm.
Calculate the difference in frequency (in Hz) between this and TMS signal in a
300 MHz instrument.

A) 1360 B) 1380 C) 13800 D) 13600