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प्रश्न
Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Why?
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उत्तर
Entropy of a metal in the liquid state is higher than that of the same metal in the solid state (Sliquid > Ssolid). So, when the metal formed is in the liquid state and the metal oxide being reduced is in the solid state, the value of entropy change (ΔS) for the reduction reaction is more on the positive side. When the value of TΔS increases and that of ΔH remains the same, the value of ΔGr° for the reduction reaction becomes negative and thus reduction becomes easier.
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संबंधित प्रश्न
Explain calcination with reactions.
What is the process in which concentrated ore is reduced to the corresponding metal by heating at high temperature with a reducing agent?
(a) Polling
(b) Pyrometallurgy
(c) Hydrometallurgy
(d) Calcination
Name the processes from which chlorine is obtained as a by-product.
MnO2 and Ca3(PO4)2 present in iron ore get reduced to Mn and P in the zone of _______.
(A) combustion
(B) reduction
(C) fusion
(D) slag formation
Which one of the following oxidation state of Manganese is unstable?
(a) + 2
(b) + 4
(c) + 5
(d) + 7
Complete the given chemical equations
`F_2 + 2Cl^(-)`
What happens when HCl is added to MnO2? Write the equations involved
In the extraction of chlorine by electrolysis of brine ______.
Which of the following reactions is an example of autoreduction?
Why are sulphide ores converted to oxide before reduction?
