Question:
Identify correctly matched sets:
I. NaHCO$_3$ - fire extinguisher
II. Na$_2$CO$_3$ - water softening
III. NaOH - purification of bauxite
Identify correctly matched sets:
I. NaHCO$_3$ - fire extinguisher
II. Na$_2$CO$_3$ - water softening
III. NaOH - purification of bauxite
I. NaHCO$_3$ - fire extinguisher
II. Na$_2$CO$_3$ - water softening
III. NaOH - purification of bauxite
Show Hint
Know industrial applications of common salts.
Check chemical reactions for use.
NaHCO$_3$, Na$_2$CO$_3$, NaOH have distinct roles.
Updated On: Mar 3, 2026
- I, II only
- II, III only
- I, III only
- I, II, III
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
• NaHCO$_3$ decomposes releasing CO$_2$ → fire extinguisher.
• Na$_2$CO$_3$ precipitates Ca$^{2+}$, Mg$^{2+}$ → water softening.
• NaOH reacts with Al$_2$O$_3$ in bauxite → purification.
• Na$_2$CO$_3$ precipitates Ca$^{2+}$, Mg$^{2+}$ → water softening.
• NaOH reacts with Al$_2$O$_3$ in bauxite → purification.
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