Account for the following.
(i) `P b X_2` is more stable than `P b X_4(X=C l, B r)`
(ii) `PbCl_4` is less stable than `SnCl_4` but `PbCl_2` is more stable than `SnCl_2`

Give reasons: PbCl_2 is more stable than PbCl_4 .

In which of the following pairs A is more stable than B?

Explain why (CH_3)_3overset(+)C is more stable than CH_3overset(+)C H_2 and overset(+)C H_3 is the least stable cation.

A die is thrown. Describe the following events (i) A : a number is less than 7(ii) B : a number is greater than 7(iii) C : a multiple of 3(iv) D : a number less than 4(v) E : an even number greater than 4(vi) F : a number not less than 3 Also find A cup B , A cap B , E cup F, D cap E , A - C , D - E, F', E cap F'

Write the following sets in roster form B={x:x is a natural number less than 6}