Some Important Compounds of Calcium
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CHXI10:THE S-BLOCK ELEMENTS

315972 Sodium peroxide in contact with moist air turns white due to formation of:

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaOH}\)
4 \(\mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315973 \(\mathrm{CO}_{2}\) gas along with solid \((\mathrm{Y})\) is obtained when sodium salt \((\mathrm{X})\) is heated. \((\mathrm{X})\) is again obtained when \(\mathrm{CO}_{2}\) gas is passed into (Y). \({\rm{X}}\,\,{\rm{\& }}\,\,{\rm{Y}}\) are

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{Na}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaOH}\)
3 \(\mathrm{NaHCO}_{3}, \mathrm{Na}_{2} \mathrm{CO}_{3}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315974 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{NaHCO}_{3}\) can be distinguished by treating with

1 litmus solution
2 dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
3 \(\mathrm{MgCO}_{3}\)
4 phenolphthalein
CHXI10:THE S-BLOCK ELEMENTS

315975 Which one of the following statements is incorrect?

1 Pure sodium metal dissolves in liquid ammonia to give blue solution
2 \(\mathrm{NaOH}\) reacts with glass to give sodium silicate
3 Aluminium reacts with excess of \(\mathrm{NaOH}\) to give \(\mathrm{Al}(\mathrm{OH})_{3}\)
4 \(\mathrm{NaHCO}_{3}\) on heating gives \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
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CHXI10:THE S-BLOCK ELEMENTS

315972 Sodium peroxide in contact with moist air turns white due to formation of:

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaOH}\)
4 \(\mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315973 \(\mathrm{CO}_{2}\) gas along with solid \((\mathrm{Y})\) is obtained when sodium salt \((\mathrm{X})\) is heated. \((\mathrm{X})\) is again obtained when \(\mathrm{CO}_{2}\) gas is passed into (Y). \({\rm{X}}\,\,{\rm{\& }}\,\,{\rm{Y}}\) are

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{Na}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaOH}\)
3 \(\mathrm{NaHCO}_{3}, \mathrm{Na}_{2} \mathrm{CO}_{3}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315974 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{NaHCO}_{3}\) can be distinguished by treating with

1 litmus solution
2 dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
3 \(\mathrm{MgCO}_{3}\)
4 phenolphthalein
CHXI10:THE S-BLOCK ELEMENTS

315975 Which one of the following statements is incorrect?

1 Pure sodium metal dissolves in liquid ammonia to give blue solution
2 \(\mathrm{NaOH}\) reacts with glass to give sodium silicate
3 Aluminium reacts with excess of \(\mathrm{NaOH}\) to give \(\mathrm{Al}(\mathrm{OH})_{3}\)
4 \(\mathrm{NaHCO}_{3}\) on heating gives \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
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CHXI10:THE S-BLOCK ELEMENTS

315972 Sodium peroxide in contact with moist air turns white due to formation of:

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaOH}\)
4 \(\mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315973 \(\mathrm{CO}_{2}\) gas along with solid \((\mathrm{Y})\) is obtained when sodium salt \((\mathrm{X})\) is heated. \((\mathrm{X})\) is again obtained when \(\mathrm{CO}_{2}\) gas is passed into (Y). \({\rm{X}}\,\,{\rm{\& }}\,\,{\rm{Y}}\) are

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{Na}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaOH}\)
3 \(\mathrm{NaHCO}_{3}, \mathrm{Na}_{2} \mathrm{CO}_{3}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315974 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{NaHCO}_{3}\) can be distinguished by treating with

1 litmus solution
2 dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
3 \(\mathrm{MgCO}_{3}\)
4 phenolphthalein
CHXI10:THE S-BLOCK ELEMENTS

315975 Which one of the following statements is incorrect?

1 Pure sodium metal dissolves in liquid ammonia to give blue solution
2 \(\mathrm{NaOH}\) reacts with glass to give sodium silicate
3 Aluminium reacts with excess of \(\mathrm{NaOH}\) to give \(\mathrm{Al}(\mathrm{OH})_{3}\)
4 \(\mathrm{NaHCO}_{3}\) on heating gives \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
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CHXI10:THE S-BLOCK ELEMENTS

315972 Sodium peroxide in contact with moist air turns white due to formation of:

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{O}\)
3 \(\mathrm{NaOH}\)
4 \(\mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315973 \(\mathrm{CO}_{2}\) gas along with solid \((\mathrm{Y})\) is obtained when sodium salt \((\mathrm{X})\) is heated. \((\mathrm{X})\) is again obtained when \(\mathrm{CO}_{2}\) gas is passed into (Y). \({\rm{X}}\,\,{\rm{\& }}\,\,{\rm{Y}}\) are

1 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{Na}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaOH}\)
3 \(\mathrm{NaHCO}_{3}, \mathrm{Na}_{2} \mathrm{CO}_{3}\)
4 \(\mathrm{Na}_{2} \mathrm{CO}_{3}, \mathrm{NaHCO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315974 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{NaHCO}_{3}\) can be distinguished by treating with

1 litmus solution
2 dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
3 \(\mathrm{MgCO}_{3}\)
4 phenolphthalein
CHXI10:THE S-BLOCK ELEMENTS

315975 Which one of the following statements is incorrect?

1 Pure sodium metal dissolves in liquid ammonia to give blue solution
2 \(\mathrm{NaOH}\) reacts with glass to give sodium silicate
3 Aluminium reacts with excess of \(\mathrm{NaOH}\) to give \(\mathrm{Al}(\mathrm{OH})_{3}\)
4 \(\mathrm{NaHCO}_{3}\) on heating gives \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
For More Updates join with Us
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