What would be the electrode potential for the given half cell reaction at pH = 5? ______.

2H₂O $$ \to $$ O₂ + 4H^{$$ \oplus $$} + 4e^– ; $$E_{red}^0$$ = 1.23 V

(R = 8.314 J mol^–1 K^–1 ; Temp = 298 k;

oxygen under std. atm. pressure of 1 bar)

Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt required to achieve 10 ppm of iron in 100 kg of wheat is _______.
Atomic weight : Fe = 55.85; S = 32.00; O = 16.00

The magnitude of work done by a gas that undergoes a reversible expansion along the path ABC shown in the figure is _______.

If a, b and c are the greatest value of ¹⁹C_p, ²⁰C_q and ²¹C_r respectively, then :