21.

Which pair does not represent the cyclic compound of the molecular formula C₄H₆?

• 

• 

• 

• 

What will be the decreasing order of stability of following carbocations?

• V >IV >III >II >I

• I > II> III >IV >V

• II >V > IV> I> II

• I> II> III >V> IV

Compound  which of the following prefix?

• trans

• Anti

• E

• Z

Friedel-Crafts reaction is not related with

• acylation

• reduction

• sulphonation

• nitration

Milk is an emulsion in which

• a gas is dispersed in water

• lactose is dispersed in water

• milk fat is dispersed in water

• a solid is dispersed in water

Micelles are

• adsorbed catalyst

• ideal solution

• gel

• associated colloids

For a non-volatile solute,

• vapour pressure of solution is more than vapour pressure of solvent

• Vapour pressure of solvent is zero

• Vapour pressure of solvent is zero

• All of the above

Which one is not the property of crystalline solid?

• A definite and regular geometry

• High intermolecular forces

• Isotropic

• Sharp melting point

Transition state 2 (TS2) is structurally most likely as a/an

• intermediate 2

• product

• intermediate 1

• transition state 3(TS3)

The decreasing order of electron affinity is

• I > Br > Cl > F 

• Br > Cl > F > I

• F > Cl > Br > I

• Cl > F > Br > I