Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major idustrial chemicals and is widely used. Nitric is manufactured by ostwald process in which catalytic oxidation of ammonia is done in following sequence as shown by reactions `4 NH_(3) (g)+50_(2)(g) overset("Pt/Rh")underset("Catalyst")(rarr) 4 NO(g)+6 H_(2)O(g)` ...(i) `2NO(g)+O_(2)(g) overset(1120 K)(rarr) 2NO_(2)(g)` ...(ii) `3 NO_(2)(g)+H_(2)O(l) rarr 2 HNO_(3)(aq)+NO(g)` ...(iii) In this process the aqueous nitric acid is obtained which can be concentrated by distillation to `~ 68.5%` by weight. Then concentration to 98% acid can be achieved by dehydration with concentrated sulfuric acid. 85 kg of `NH_(3) (g)` was heated with 320 kg oxygen in the first step and `HNO_(3)` is prepared according to the above reactions. If the final solution has volume 500 lt. Then molarity of `HNO_(3)` isA. 3.33 MB. 8 MC. 2 MD. 6.66 M

Nitric acid is the most important oxi-acid formed by nitrogen. It is o

1.	Nitric acid is the most important oxi-acid formed by nitrogen. It is one of the major idustrial chemicals and is widely used. Nitric is manufactured by ostwald process in which catalytic oxidation of ammonia is done in following sequence as shown by reactions `4 NH_(3) (g)+50_(2)(g) overset("Pt/Rh")underset("Catalyst")(rarr) 4 NO(g)+6 H_(2)O(g)` ...(i) `2NO(g)+O_(2)(g) overset(1120 K)(rarr) 2NO_(2)(g)` ...(ii) `3 NO_(2)(g)+H_(2)O(l) rarr 2 HNO_(3)(aq)+NO(g)` ...(iii) In this process the aqueous nitric acid is obtained which can be concentrated by distillation to `~ 68.5%` by weight. Then concentration to 98% acid can be achieved by dehydration with concentrated sulfuric acid. 85 kg of `NH_(3) (g)` was heated with 320 kg oxygen in the first step and `HNO_(3)` is prepared according to the above reactions. If the final solution has volume 500 lt. Then molarity of `HNO_(3)` isA. 3.33 MB. 8 MC. 2 MD. 6.66 M
Answer» Correct Answer - D `4 NH_(3)(g)+5O_(2)(g) rarr 4NO+6H_(2)O` `5xx10^(3)` mole `10^(4)` mole `5xx10^(3)` `{:(2NO(g)+O_(2)(g) rarr 2NO_(2) (g)),(5xx10^(3)" "5xx10^(3)),(3NO_(2)+H_(2)O(l) rarr 2HNO_(3)(g)+NO(g)),(5xx10^(3)" "2/3xx5xx10^(3)):}` Molarity `=2/3xx(5xx10^(3))/500=6.66 M`.

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