Hardness of Water
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CHXI09:HYDROGEN

315524 Which is not present in clear hard water

1 \(\mathrm{\mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2}}\)
2 \(\mathrm{\mathrm{CaCl}_{2}}\)
3 \(\mathrm{\mathrm{MgSO}_{4}}\)
4 \(\mathrm{\mathrm{MgCO}_{3}}\)
CHXI09:HYDROGEN

315525 Which of the following groups of ions makes the water hard?

1 Sodium and bicarbonate
2 Magnesium and chloride
3 Potassium and sulphate
4 Ammonium and chloride
CHXI09:HYDROGEN

315526 Statement A :
Hard water forms scum/ precipitate with soap.
Statement B :
Formation of scum occurs as

\(\mathrm{2 \mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COONa}(\mathrm{aq})+\mathrm{M}^{2+}(\mathrm{aq}) \longrightarrow}\)

\(\mathrm{\left(\mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COO}\right)_{2} \mathrm{M} \downarrow+2 \mathrm{Na}^{+}(\mathrm{aq}) ; \mathrm{M}}\) is \(\mathrm{\mathrm{Ca} / \mathrm{Mg}}\)

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.
CHXI09:HYDROGEN

315527 Which of the following ions will cause hardness in water?

1 \(\mathrm{\mathrm{Ca}^{2+}}\)
2 \(\mathrm{\mathrm{Na}^{+}}\)
3 \(\mathrm{\mathrm{Cl}^{-}}\)
4 \(\mathrm{\mathrm{K}^{+}}\)
KCET - 2018
CHXI09:HYDROGEN

315528 The hardness of water is estimated by

1 EDTA method
2 titrimetric method
3 conductivity method
4 distillation method
NEET DIGITAL LIBRARY
CHXI09:HYDROGEN

315524 Which is not present in clear hard water

1 \(\mathrm{\mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2}}\)
2 \(\mathrm{\mathrm{CaCl}_{2}}\)
3 \(\mathrm{\mathrm{MgSO}_{4}}\)
4 \(\mathrm{\mathrm{MgCO}_{3}}\)
CHXI09:HYDROGEN

315525 Which of the following groups of ions makes the water hard?

1 Sodium and bicarbonate
2 Magnesium and chloride
3 Potassium and sulphate
4 Ammonium and chloride
CHXI09:HYDROGEN

315526 Statement A :
Hard water forms scum/ precipitate with soap.
Statement B :
Formation of scum occurs as

\(\mathrm{2 \mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COONa}(\mathrm{aq})+\mathrm{M}^{2+}(\mathrm{aq}) \longrightarrow}\)

\(\mathrm{\left(\mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COO}\right)_{2} \mathrm{M} \downarrow+2 \mathrm{Na}^{+}(\mathrm{aq}) ; \mathrm{M}}\) is \(\mathrm{\mathrm{Ca} / \mathrm{Mg}}\)

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.
CHXI09:HYDROGEN

315527 Which of the following ions will cause hardness in water?

1 \(\mathrm{\mathrm{Ca}^{2+}}\)
2 \(\mathrm{\mathrm{Na}^{+}}\)
3 \(\mathrm{\mathrm{Cl}^{-}}\)
4 \(\mathrm{\mathrm{K}^{+}}\)
KCET - 2018
CHXI09:HYDROGEN

315528 The hardness of water is estimated by

1 EDTA method
2 titrimetric method
3 conductivity method
4 distillation method
Join With Us for More Updates
CHXI09:HYDROGEN

315524 Which is not present in clear hard water

1 \(\mathrm{\mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2}}\)
2 \(\mathrm{\mathrm{CaCl}_{2}}\)
3 \(\mathrm{\mathrm{MgSO}_{4}}\)
4 \(\mathrm{\mathrm{MgCO}_{3}}\)
CHXI09:HYDROGEN

315525 Which of the following groups of ions makes the water hard?

1 Sodium and bicarbonate
2 Magnesium and chloride
3 Potassium and sulphate
4 Ammonium and chloride
CHXI09:HYDROGEN

315526 Statement A :
Hard water forms scum/ precipitate with soap.
Statement B :
Formation of scum occurs as

\(\mathrm{2 \mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COONa}(\mathrm{aq})+\mathrm{M}^{2+}(\mathrm{aq}) \longrightarrow}\)

\(\mathrm{\left(\mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COO}\right)_{2} \mathrm{M} \downarrow+2 \mathrm{Na}^{+}(\mathrm{aq}) ; \mathrm{M}}\) is \(\mathrm{\mathrm{Ca} / \mathrm{Mg}}\)

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.
CHXI09:HYDROGEN

315527 Which of the following ions will cause hardness in water?

1 \(\mathrm{\mathrm{Ca}^{2+}}\)
2 \(\mathrm{\mathrm{Na}^{+}}\)
3 \(\mathrm{\mathrm{Cl}^{-}}\)
4 \(\mathrm{\mathrm{K}^{+}}\)
KCET - 2018
CHXI09:HYDROGEN

315528 The hardness of water is estimated by

1 EDTA method
2 titrimetric method
3 conductivity method
4 distillation method
For More Updates join with Us
CHXI09:HYDROGEN

315524 Which is not present in clear hard water

1 \(\mathrm{\mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2}}\)
2 \(\mathrm{\mathrm{CaCl}_{2}}\)
3 \(\mathrm{\mathrm{MgSO}_{4}}\)
4 \(\mathrm{\mathrm{MgCO}_{3}}\)
CHXI09:HYDROGEN

315525 Which of the following groups of ions makes the water hard?

1 Sodium and bicarbonate
2 Magnesium and chloride
3 Potassium and sulphate
4 Ammonium and chloride
CHXI09:HYDROGEN

315526 Statement A :
Hard water forms scum/ precipitate with soap.
Statement B :
Formation of scum occurs as

\(\mathrm{2 \mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COONa}(\mathrm{aq})+\mathrm{M}^{2+}(\mathrm{aq}) \longrightarrow}\)

\(\mathrm{\left(\mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COO}\right)_{2} \mathrm{M} \downarrow+2 \mathrm{Na}^{+}(\mathrm{aq}) ; \mathrm{M}}\) is \(\mathrm{\mathrm{Ca} / \mathrm{Mg}}\)

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.
CHXI09:HYDROGEN

315527 Which of the following ions will cause hardness in water?

1 \(\mathrm{\mathrm{Ca}^{2+}}\)
2 \(\mathrm{\mathrm{Na}^{+}}\)
3 \(\mathrm{\mathrm{Cl}^{-}}\)
4 \(\mathrm{\mathrm{K}^{+}}\)
KCET - 2018
CHXI09:HYDROGEN

315528 The hardness of water is estimated by

1 EDTA method
2 titrimetric method
3 conductivity method
4 distillation method
NEET DIGITAL LIBRARY
CHXI09:HYDROGEN

315524 Which is not present in clear hard water

1 \(\mathrm{\mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2}}\)
2 \(\mathrm{\mathrm{CaCl}_{2}}\)
3 \(\mathrm{\mathrm{MgSO}_{4}}\)
4 \(\mathrm{\mathrm{MgCO}_{3}}\)
CHXI09:HYDROGEN

315525 Which of the following groups of ions makes the water hard?

1 Sodium and bicarbonate
2 Magnesium and chloride
3 Potassium and sulphate
4 Ammonium and chloride
CHXI09:HYDROGEN

315526 Statement A :
Hard water forms scum/ precipitate with soap.
Statement B :
Formation of scum occurs as

\(\mathrm{2 \mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COONa}(\mathrm{aq})+\mathrm{M}^{2+}(\mathrm{aq}) \longrightarrow}\)

\(\mathrm{\left(\mathrm{C}_{17} \mathrm{H}_{35} \mathrm{COO}\right)_{2} \mathrm{M} \downarrow+2 \mathrm{Na}^{+}(\mathrm{aq}) ; \mathrm{M}}\) is \(\mathrm{\mathrm{Ca} / \mathrm{Mg}}\)

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.
CHXI09:HYDROGEN

315527 Which of the following ions will cause hardness in water?

1 \(\mathrm{\mathrm{Ca}^{2+}}\)
2 \(\mathrm{\mathrm{Na}^{+}}\)
3 \(\mathrm{\mathrm{Cl}^{-}}\)
4 \(\mathrm{\mathrm{K}^{+}}\)
KCET - 2018
CHXI09:HYDROGEN

315528 The hardness of water is estimated by

1 EDTA method
2 titrimetric method
3 conductivity method
4 distillation method