0. Asmall amount of electrolyte increases the zeta potential of lyophilic colloids
D. Critical Micellar concentration decreases as the molecular weight of a
hydrocarbon chain increases

A:-A, B and C are correct
B:-A, B and D are correct
C:-A, C and D are correct
D:-A, B, C and D are correct
Correct Answer:- Option-B

Question66:-Identify the correct statements(s) from the following

A. Regioselectivity of the hydroboration step can be improved with bulky boranes
B. For mono-substituted cyclohexane, the equatorial conformer is more stable
than the axial-conformer because of the 1,3- diaxal interaction

C. Hydroboration/Oxidation proceeds in an Anti-Markovnikov manner, where the
hydrogen from ‏يمسم عه وعم‎ attaches to the more substituted carbon

D. Addition of to a carbon carbon double bond is Markovinikov syn addition

A:-A, C and D are correct
B:-A, B and D are correct
C:-A, B and C are correct
D:-A, B, C and D are correct
Correct Answer:- Option-C

Question67:-If we consider trans-1-t-butyl-3 methylcyclohexane, in its most stable
conformation, then the substituents at Cl and C3 are

A:-Axial and Equatorial positions respectively
B:-Equatorial and Equatorial positions respectively
C:-Equatorial and Axial positions respectively
D:-Axial and axial positions respectively
Correct Answer:- Option-C
Question68:-Which one of the following could be grouped as prochiral molecules?
A:-Pyruvic acid and propionic acid
B:-Pyruvic acid and methane
C:-Ethanol and Methane
D:-Propionic acid and methane
Correct Answer:- Option-A
Question69:-Cyclopentadiene is more acidic than cyclopentane, because

A:-Cyclopentadiene has conjugated double bonds and when it loses a z+ , the
resulting carbanion becomes planar

B:-Cyclopentadiene has double bond and of its structure is cyclic and non
planar

C:-Cyclopentadiene has conjugated double and once deprotonated, the
orbitals on the carbon atom would re-hybridize from sp° to sp? placing the lone-pair of