Question

The production cost of hydrogen from a mineral acid using zinc is Rs. 12 per mole. How many electrons is worth of rupee.

​

Answer 1

Explanation:

Electrolysis of water gives:

H

2

O→H

2

+

2

1

O

2

On electrolysis of water, hydrogen, and oxygen formed in the ratio 2:1.

Since X litres of H

2

is formed. Amount of O

2

formed will be

2

X

. Since cost of production of electricity from

2

X

litres of O

2

= Rs X

So, cost of production of electricity from X litres of O

2

= Rs 2X.

Answer 2

Answer:

$1.004*10^{23}$

Explanation:

Reaction of mineral acid with zinc is given as Zn+2HCl →Zn$Cl_{2}$ +$H_{2}$

The net reactions is 2$H^{+}$ +2$e^{-}$→$H_{2}$

1 mole of $H_{2}$ = 2 moles of electrons

12 rupees = (2 x 6.022) $10^{23}$ electrons

1 rupee = ?

⇒ Number of electrons worth of one rupee $\frac{1}{12} *2*6.033*10^{23}=1.004*10^{23}$