Home
Class 12
CHEMISTRY
Assertion : Temporory hardness can be re...

Assertion : Temporory hardness can be removed by boiling.
Reason : On boiling the soluble bicarbonates change to carbonates which being insoluble, get precipitated.

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are False.

Text Solution

Verified by Experts

The correct Answer is:
A

Temparary hardness is due to presence of `Ca(HCO_(3))_(2)&Mg(HCO_(3))_(2)`
an heating these soluble bicarbonate changes into insoluble carbonates.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Assertion : Water can be made to boil without heating. Reason : Boiling point is lowered by increasing pressure.

Temporary hardness of water due to Mg(HCO_3)_2 can be completely removed by boiling because

Assertion: Permanent hardness of water can be removed by treatement with washing soda. Reason: Washing soda reacts with calcium and magnesium sulphates and chlorides to form insoluble carbonates.

Assertion (A) Permanent hardness of water is removed by treatment with washing soda. Reson (R) Washing soda reacts with soluble magnesium and calcium sulphate to from insolube carbonates.

Assertion (A): K_(2)CO_(3) cannot be prepared by Solvaly process. Reason (R ): KHCO_(3) being fairly soluble does not precipitate out in carbonation tower.

Assertion : Thermoplastics become hard on heating and soft on cooling. Reason : Themoplastics are cross - linked polymers which are soluble in many organic solvents.

ALLEN-HYDROGEN-EXERCISE-5
  1. Assertion : Cu react with HCl & form H(2) gas Reason : Cu above then...

    Text Solution

    |

  2. Assertion (A) Decomposition of H(2)O(2) is a disproportionation reacti...

    Text Solution

    |

  3. Assertion (A) Hydrogen combines with order elements by losing, gaining...

    Text Solution

    |

  4. Assertion (A) H(2)O(2) is not stored in glass bottles. Reason (R ) ...

    Text Solution

    |

  5. Assertion : Ferricyanide ion oxidises H(2)O(2) to H(2)O. Reason : Ox...

    Text Solution

    |

  6. Assertion:- The colour of old lead paintings can be restored by washin...

    Text Solution

    |

  7. Assertion : Water has a boiling point higher than that of H(2)S. Rea...

    Text Solution

    |

  8. Assertion : H(2)O(2) react with PbS to form PbSO(4). Reason : H(2)O(...

    Text Solution

    |

  9. Assertion : Molar mass of D(2)O is more than than of protium oxide. ...

    Text Solution

    |

  10. Assertion (A) The O-O bond length in H(2)O(2) is shorter than that in ...

    Text Solution

    |

  11. Asseriton : Hard Water is not fit for washing clothes. Reason : It c...

    Text Solution

    |

  12. Assertion : Reducing power of Nascent hydrogen much greater then simpl...

    Text Solution

    |

  13. Assertion : Rate of reaction CD(4)+Cl(2)rarr" Slow "CH(4)+C...

    Text Solution

    |

  14. Assertion : Hydrogen cannot be prepared in laboratory. Reason : Hydr...

    Text Solution

    |

  15. Assertion : Ortho and Para dihydrogen are nuclear spin isomers. Reas...

    Text Solution

    |

  16. Assertion : Saline hydrides are non volatile, non conducting & crystal...

    Text Solution

    |

  17. Assertion : Temporory hardness can be removed by boiling. Reason : O...

    Text Solution

    |

  18. Assertion : Sulphur is oxidised by H(2)O(2) in presence of Fe(III) R...

    Text Solution

    |