Correct Answer:- Option-D

Question75:-What is the correct order of 2... for n-> []* transition for the following
organic groups, R-N=N-R, R-CN and R-vo, ?

A:-R-N0,>R-CN =R-N=N-R
B:-R-CNC:-R-N0,>R-CN>R-N=N-R
D:-R-N =N-RCorrect Answer:- Option-B

Question76:-Which among the following statements are correct?

^. Ninhydrin is sprayed to locate amino acids and on applying ninhydrin amino
acids will be appeared in pink to purple colour

B. The four main system in HPLC are mobile phase reservoirs Injector system,
column and detector

C. Gas chromatography is a type of adsorption chromatography in which the
mobile phase is a gas

ம. Elutropic series is a series of various compounds in order of adsorbtion power
for a given adsorbent

A:-A, B and D are correct
B:-A, C and D are correct
C:-A, B and C are correct
D:-A, B, C and D are correct
Correct Answer:- Option-C
Question77:-Which of the following set of reactions are given by citral?
A:-React with ozone semicarbazone and is optically active

B:-React with bisulphite, is optically active and heating with potassium
bisulphate gives p-Cymene

C:-React with bisulphite, exhibit geometrical isomerism and heating with
potassium bisulphite gives Levulinic aldehyde

D:-React with bisulphite, Ozone and exhibit geometrical isomerism
Correct Answer:- Option-D

Question78:-During ion exchange separation, ion exchange is favoured at higher
concentration, when

A:-Resin and solution has lower positive charge

B:-Resin has higher positive charge and solution has same positive charge
C:-Resin has higher positive charge and solution has lower positive charge
D:-Resin has lower positive charge and solution has higher positive charge
Correct Answer:- Option-C

Question79:-Ildentify the wrong statement(s) from the following

A. In GC-MS the compounds to be analysed must be sufficienly volatile and
thermally stable

B. The gas chromatograph utilises a capillary colomn which does not depend