Question

Calcium oxide, $CaO$ is used to remove $S{{O}_{2}}$ from power plant exhaust. In what form $CaO$ removes $S{{O}_{2}}$ ?
(A) $CaS{{O}_{3}}$
(B) $CaS{{O}_{4}}$
(C) $Ca{{\left( HS{{O}_{3}} \right)}_{2}}$
(D) $Ca{{\left( HS{{O}_{4}} \right)}_{2}}$

Answer 1

Hint : We know that to reduce the percent $S{{O}_{2}}$ in environment and to produce a byproduct with $S{{O}_{2}}$ , to control air pollution. The present work envisages a situation that compares the efficiency of three different reagents.

Complete Step By Step Answer:
As we know, the sodium hydroxide, hydrated lime and stuff of the water treatment plant containing $CaO$ in removal of $S{{O}_{2}}$ might be generated during this scenario. Varied parameters were conjointly discovered with variation involving $$ concentration of reactants, hydrogen ion concentration of the answer, time for reaction, temperature of resolution and flow of flue gas in impingers. Pet coke with lime stone is getting used for power generation in stations throughout the experiment, the pet coke having sulphur leading to emission of $S{{O}_{2}}.$ thus experiments are conducted to entice these gases to provide sulphates.
The stuff of water treatment plant, hydrated lime, and caustic soda in varied permutation and combination are used with management flow by $S{{O}_{2}}$ watching kit for preparation of salt and sodium sulfate. Therefore caustic soda clothed to be higher as compared to hydrated lime and sludge.
$2CaO+2S{{O}_{2}}+{{O}_{2}}\to 2CaS{{O}_{4}}$
Thus, it is removing in the form of $CaS{{O}_{4}}$
Therefore, the correct answer is option B.

Note :
Remember that it's conjointly finished that hydrogen ion concentration of the answer ought to be basic permanently absorption of $S{{O}_{2}}$ and most absorption of $S{{O}_{2}}$ found in direct passing of $S{{O}_{2}}$ in impinge as compared to indirect passing of $S{{O}_{2}}$ in impingers. Smart absorption of $S{{O}_{2}}$ found at temperature varies between $20-25{}^\circ C$ and it looks to be optimum. Most recovery of $S{{O}_{2}}$ was obtained once the reaction befell for a while.