Assignment on Unit 1

Full Name (Surname Name Midddle name)

Which of the following statement is correct?

• A dissociative mechanism is a 2-step mechanism with the leaving group departing in the second step
• An associative mechanism is a 2-step mechanism, where the intermediate has a lower coordination number than the starting complex
• In a dissociative exchange mechanism, bond breaking dominates over bond formation.
• In an associative exchange mechanism, the entering group associates with the substrate after the leaving group has departed.

The reactant in which some bonds are broken and some new ones are formed as a result of the attacking reagent is called………..

• substrate
• substance
• attacking reagent
• none of these

The electrophilic reagent may be ………………species.

• electron loving
• electron pair acceptor
• positively charged ions
• all of these

The reactions in which aquo complex is formed by replacement of ligand by water molecules are called as …………reactions.

• aquation
• anation
• base hydrolysis
• addition

In associative mechanism, bond ………….. is important.

• breaking
• partial breaking
• making
• not breaking

In SN1 reaction of octahedral complex, …………..coordinated intermediate is formed.

• 5
• 7
• 6
• 4

Acc. to Taube, complexes which undergo rapid substitution of ligands within 1 minute at 25 degree celcius are called ……….. complexes.

• labile
• inert
• stable
• unstable

SN1 Mechanism may proceed through ………………. arrangement.

• OW
• TBP
• square planar
• octahedral

In dissociative mechanism, bond ………….. is important.

• making
• breaking
• partial breaking
• partial making