315551
Permanent hardness in water cannot be cured by:
1 Treatment with washing soda
2 Boiling
3 Calgon's method
4 Ion exchange method
Explanation:
Only temporary hardness which is due to \(\mathrm{\mathrm{HCO}_{3}^{-}}\)(bicarbonate) ions is removed by boiling.
JEE - 2015
CHXI09:HYDROGEN
315552
Statement A : Calgon is used for removing permanent hardness of water. Statement B : Calgon forms precipitates with \(\mathrm{\mathrm{Ca}^{2+}}\) and \(\mathrm{\mathrm{Mg}^{2+}}\)
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Calgon forms soluble complexes with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) in which properties of these ions are masked.
CHXI09:HYDROGEN
315553
When zeolite is treated with hard water, the sodium ions are exchanged with
4 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
Explanation:
When zeolite is treated with hard water, the sodium ions are exchanged with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions. \[\begin{array}{l} {\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{Z}}\,{\rm{ + }}\,{{\rm{M}}^{{\rm{2 + }}}} \to {\rm{2N}}{{\rm{a}}^{\rm{ + }}}{\rm{ + }}\,{\rm{MZ(M}}\,{\rm{ = }}\,{\rm{Ca}}\,{\rm{or}}\,{\rm{Mg)}}\\ {\rm{Zeolite}} \end{array}\]
315551
Permanent hardness in water cannot be cured by:
1 Treatment with washing soda
2 Boiling
3 Calgon's method
4 Ion exchange method
Explanation:
Only temporary hardness which is due to \(\mathrm{\mathrm{HCO}_{3}^{-}}\)(bicarbonate) ions is removed by boiling.
JEE - 2015
CHXI09:HYDROGEN
315552
Statement A : Calgon is used for removing permanent hardness of water. Statement B : Calgon forms precipitates with \(\mathrm{\mathrm{Ca}^{2+}}\) and \(\mathrm{\mathrm{Mg}^{2+}}\)
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Calgon forms soluble complexes with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) in which properties of these ions are masked.
CHXI09:HYDROGEN
315553
When zeolite is treated with hard water, the sodium ions are exchanged with
4 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
Explanation:
When zeolite is treated with hard water, the sodium ions are exchanged with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions. \[\begin{array}{l} {\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{Z}}\,{\rm{ + }}\,{{\rm{M}}^{{\rm{2 + }}}} \to {\rm{2N}}{{\rm{a}}^{\rm{ + }}}{\rm{ + }}\,{\rm{MZ(M}}\,{\rm{ = }}\,{\rm{Ca}}\,{\rm{or}}\,{\rm{Mg)}}\\ {\rm{Zeolite}} \end{array}\]
315551
Permanent hardness in water cannot be cured by:
1 Treatment with washing soda
2 Boiling
3 Calgon's method
4 Ion exchange method
Explanation:
Only temporary hardness which is due to \(\mathrm{\mathrm{HCO}_{3}^{-}}\)(bicarbonate) ions is removed by boiling.
JEE - 2015
CHXI09:HYDROGEN
315552
Statement A : Calgon is used for removing permanent hardness of water. Statement B : Calgon forms precipitates with \(\mathrm{\mathrm{Ca}^{2+}}\) and \(\mathrm{\mathrm{Mg}^{2+}}\)
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Calgon forms soluble complexes with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) in which properties of these ions are masked.
CHXI09:HYDROGEN
315553
When zeolite is treated with hard water, the sodium ions are exchanged with
4 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
Explanation:
When zeolite is treated with hard water, the sodium ions are exchanged with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions. \[\begin{array}{l} {\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{Z}}\,{\rm{ + }}\,{{\rm{M}}^{{\rm{2 + }}}} \to {\rm{2N}}{{\rm{a}}^{\rm{ + }}}{\rm{ + }}\,{\rm{MZ(M}}\,{\rm{ = }}\,{\rm{Ca}}\,{\rm{or}}\,{\rm{Mg)}}\\ {\rm{Zeolite}} \end{array}\]
315551
Permanent hardness in water cannot be cured by:
1 Treatment with washing soda
2 Boiling
3 Calgon's method
4 Ion exchange method
Explanation:
Only temporary hardness which is due to \(\mathrm{\mathrm{HCO}_{3}^{-}}\)(bicarbonate) ions is removed by boiling.
JEE - 2015
CHXI09:HYDROGEN
315552
Statement A : Calgon is used for removing permanent hardness of water. Statement B : Calgon forms precipitates with \(\mathrm{\mathrm{Ca}^{2+}}\) and \(\mathrm{\mathrm{Mg}^{2+}}\)
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Calgon forms soluble complexes with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) in which properties of these ions are masked.
CHXI09:HYDROGEN
315553
When zeolite is treated with hard water, the sodium ions are exchanged with
4 \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions
Explanation:
When zeolite is treated with hard water, the sodium ions are exchanged with \(\mathrm{Ca}^{2+}\) and \(\mathrm{Mg}^{2+}\) ions. \[\begin{array}{l} {\rm{N}}{{\rm{a}}_{\rm{2}}}{\rm{Z}}\,{\rm{ + }}\,{{\rm{M}}^{{\rm{2 + }}}} \to {\rm{2N}}{{\rm{a}}^{\rm{ + }}}{\rm{ + }}\,{\rm{MZ(M}}\,{\rm{ = }}\,{\rm{Ca}}\,{\rm{or}}\,{\rm{Mg)}}\\ {\rm{Zeolite}} \end{array}\]
