p(H)

Among the following a) On dilution, the P^(H) of an acid increases b) A solutions with P^(H) = 61000 times more basic than a solution with P^(H) = 3 c) A Solution with p^(H) = 9 is 1000 times more acidic than a solution with P^(H) = 12 d) The P^(H) of 10^(9) M NaOH is slightly greater tha n 7

The angles of elevation of the top of a tower from the top and foot of a pole are respectively 30^(@) and 45^(@) . If h_(T) is the height of the tower and h_(P) is the height of the pole, then which of the following are correct? 1. (2h_(P)h_(T))/(3+sqrt(3))=h_(P)^(2) " " 2. (h_(T)-h_(P))/(sqrt(3)+1)=(h_(P))/(2) 3. (2(h_(P)+h_(T)))/(h_(P))=4+sqrt(3) Select the correct answer using the code given below.

|underset("("p_(1)")")(H_(2))|underset("("p_(1)")")(H^(+))|underset("("1M")")(H^(+))|underset("("p_(2)")")(H_(2))| Pt (where p_(1) and p_(2) are pressures) cell reactioin will be spontaneous if:

The emf of given cell Pt - underset(P_(1))(H_(2))|H^(+)|underset(P_(2))(H_(2) - Pt is :

Oxidation state of P in H_(4)P_(2)O_(5), H_(4)P_(2)O_(6), H_(4)P_(2)O_(7) are respectively