Give decreasing order of the stabilities of the following :

Explanation

`EDG` increases the stability of

-I order-`NO_(2) gt -Cl gt -OMe`
so the order is 2gt3gt4gt1gt5. (b) Here we have an aromatic compound, so resonance effect and `H.C` will also operate.


Net `ED` power of `4 gt 5` (because `(+ R) gt H.C)`
So the order is : `2 gt 3 gt 1 gt 5 gt 4 `. Structure `(4)` has more `EDG` due to resonance effect is greater than `+1` and `H.C`
( c) Same as in `(b)` except in `(5) (OMe)` group is at `m`, where there is no resonance (only `- I` is considered)
So the order is :
`2 gt 5 gt (-I at m "is more than" - I at p) gt 3 gt 1 gt 4 (here -I and + R, + R gt -I)`.
Order is : `2 gt 5 gt 3 gt 1 gt 4`
(d) Reverse of (a) `(5 gt 1 gt 4 gt 3 gt 2)`.
(e) Reverse of (b) `(4 gt 5 gt 1 gt 3 gt 2)`.
(f) Reverse of ( c) `(4 gt 1 gt 3 gt 5 gt 2 )`.
(g) Stability of benzy1 `C^(oplus)` is determined by ` H.C`
Since `H.C` in `(2)` is greater than in `(3)` and `(4)`, the order is `2 gt 3 gt 4 gt 1 gt 6 gt 5`.