Which statement is incorrect? (a) Manufacture of \( \mathrm{Na}_{2}...

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Which statement is incorrect?
(a) Manufacture of \( \mathrm{Na}_{2} \mathrm{CO}_{3} \) is done by Solvay process.
\( \mathrm{P} \)
(b) Manufacture of \( \mathrm{K}_{2} \mathrm{CO}_{3} \) is done by Solvay process.
W
(c) Manufacture of \( \mathrm{NaOH} \) is done by Castner Kellner process.
(d) Manufacture of \( \mathrm{NaHCO}_{3} \) is done by Solvay process.
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