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Question: \(C + {H_2}O\) (steam) is passed over red hot coke to produce: (A). \(C{O_2} + {H_2}\) (B). \(CO...

C+H2OC + {H_2}O (steam) is passed over red hot coke to produce:
(A). CO2+H2C{O_2} + {H_2}
(B). CO+O2CO + {O_2}
(C). CO+H2CO + {H_2}
(D). O2+H2+C{O_2} + {H_2} + C

Explanation

Solution

The mixture of carbon and steam when passed over red hot coke it produces a water gas which is a flammable gas.Water gas is a mixture of carbon monoxide and hydrogen produced from synthesis gas. The water-gas shift reaction can be used to oxidise the carbon monoxide while producing additional hydrogen, resulting in water gas.

Complete step by step answer:
When a mixture of carbon and steam is passed are red hot coke to produce a water gas. Water gas is a full gas consisting mainly of carbon monoxide and hydrogen mode by passing steam over red hat coke.
i.e. HH
H2O+C→CO+H2(ΔH=+131KJ/mol) (steam)(hat) {H_2}O + C \to CO + {H_2}\left( {\Delta H = + 131KJ/mol} \right) \\\ (steam)(hat) \\\
This relation is endothermic so heat must be added to sustain it. There are two ways this is done. One is to cause combustion of some carbon with steam.
O2+C→CO2{O_2} + C \to C{O_2} :ΔH=−393.5KJ/mol:\Delta H = - 393.5KJ/mol
The other method is to use oxygen gas rather than air, which yields carbon monoacids rather than carbon discoid.
O2+2C→2CO{O_2} + 2C \to 2CO ;ΔH=−221KJ/mol;\Delta H = - 221KJ/mol
The water gas was first produced in England in 1828 by blousing steam with white hot coke. In 1873, Thaddeus such Laue patented a progress that used the water gas shift reaction to enrich the gas with hydrogen.
Water gas is used to remove carbon dioxide from fuel cells.it is used in fischer-tropsch process and it is also used to obtain pure hydrogen to synthesize ammonia.
We got to know that when a mixture of carbon and steam is passed over red hot coke, water gas (CO+H2)\left( {CO + {H_2}} \right) is produced.
Hence the correct option is C.

Note:
Remember that whenever a carbon is heated in presence of air, it gives carbon-diocese as the main product and when it is heated in presence of oxygen, it gives carbon monoxide as the product.