Explain giving reasons the following:
`BF_3` is a weaker Lewis acid than `BCl_3`

Account for the following observations (a) AlCl_(3) is a Lewis acid (b) Though fluorine is more electronegative than chlorine yet BF_(3) is a weaker Lewis acid than BCI_(3) (c) PbO_(2) is a stronger oxidising agent than SnO_(2) (d) The +1 oxidation state of thallium is more stable than its +3 state.

AlCl_3 is a Lewis acid.

Which of the following is not a Lewis acid ?

Why is BF_(3) a Lewis acid?

PH3 is a weaker base than NH3

Explain the following: Aniline is a weaker base than ethylamine.

Which of the following is a lewis acid ?

Explain why the following compounds behave as Lewis acids ? (a) BCl_(3) (b) AlCl_(3)

The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses: Assertion: NF_3 is weaker ligand than N(CH_3)_3 . Reason: NF_3 ionizes to give F^(-) ions in aqueous solution.

Give reasons for the following Concentrated sulphuric acid is a weaker acid compared to dilute sulphuric acid.