Home
Class 12
CHEMISTRY
Asseriton : Hard Water is not fit for wa...

Asseriton : Hard Water is not fit for washing clothes.
Reason : It contains `Ca^(+2) & Mg^(+2)` ion which can forms ppt with soap & detergents.

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
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Hard water is not fit for washing clothes because

What is the problem with hard water for washing clothes with soap ?

Which has the largest ionic radius Ca^(2+) , Mg^(2+) , Ba^(2+) ?

(a) What is a soap? Why are soaps not suitable for washing clothes when the water is hard? (b) Explain the action of soap in removing an oily spot from a piece of cloth.

Assertion : Soft water lathers with soap but not hard water. Reason : Hard water reacts with soap to form insoluble salts which form scum, not lather.

Name the compound used for measuring the hardness of water, i.e., for estimation of Ca^(2+) and Mg^(2+) ions.

Why is CaSO_(4) not precipitated on adding ammonium sulphate to a solution containing Ca^(2+) and Sr^(2+) ions?

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

0.0093 g of Na_(2)H_(2)EDTA.2H_(2)O is dissolved in 250 mL of aqueous solution. A sample of hard water containing Ca^(2+) and Mg^(2+) ions is titrated with the above EDTA solution using a buffer of NH_(4)OH+NH_(4)Cl using eriochrome balck- T as indicator. 10 mL of the above EDTA solution requires 10 mL of hard water at equivalent point. another sample of hard water is titrated with 10 mL of above EDTA solution using KOH solution (pH=12) . using murexide indicator, it requires 40 mL of hard water at equivalence point. a. Calculate the ammount of Ca^(2+) and Mg^(2+) present in 1L of hard water. b. Calculate the hardness due to Ca^(2+) , mG^(2+) ions and the total hardness of water in p p m of CaCO_(3) . (Given MW(EDTA sal t)=372 g mol^(-1),MW(CaCO_(3))=100 gmol^(-1) )

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

    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 (A): The colour of old lead painting can be restored by wash...

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  16. Assertion : Temporary hardness can be removed by boiling. Reason : O...

    Text Solution

    |

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

    Text Solution

    |