Home
Class 12
CHEMISTRY
(A) Conversion of fresh precipitate to c...

(A) Conversion of fresh precipitate to colloidal state is called peptization
(R ) It is caused by the addition of common ions

A

Both (A) and (R ) are true and (R ) is the correct explanation of (A)

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A) is true but (R ) is false

D

Both (A) and (R ) are false

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    AAKASH SERIES|Exercise Objective Excersice - 3 (PREVIOUS NEET/AIPMT QUESTIONS)|12 Videos

  • STOICHIOMETRY

    AAKASH SERIES|Exercise PRACTICE SHEET (ADVANCED) (INTEGER TYPE QUESTION)|2 Videos

  • VA GROUP ELEMENTS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|51 Videos

Similar Questions

Explore conceptually related problems

(A) Fluorine exhibits only -l oxidation state (R ) Fluorine is called super halogen

Assertion (A) : P^(H) of an aqueous solution of acetic acid remians unchanged on the addition of sodium acetate. Reason ( R ) : Dissociation of acetic acid is supressed by the addition of soidum acetate due to common ion effect.

(A) Esters of fatty acids are hydrolysed by NaOH and the soap obtained remains in colloidal form. It is precipitated from the solution by adding NaCl. (R) Precipitation of soap is due to common ion effect.

Identify the correct statement from the foolowing. (i) In the oxidation of oxalic acid with KMnO_(4) in acid medium, Mn^(2+) acts as auto catalyst. (ii) CdS colloidal solution can be precipited by the addition of C1^(-) ions. (iii) The gold number of three protective colloids (A, B, C) is 0.03,25 and 0.25 respectively. Their protective power follows the order A gt C gt B. (iv) Physisorption is an irreversible process.

Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. The oxidation state of the most electronegative element in the products of the reaction between BaO_(2) and H_(2)SO_(4) are

Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. A compound of Xe and F is found to have 53.3% Xe (atomic weight =133). Oxidation number of Xe in this compound is

Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. Oxidation number of sodium in sodium amalgam is

AAKASH SERIES-SURFACE CHEMISTRY-Objective Excersice - 4 (ASSERTION (A)& REASON (R ) TYPE QUESTION)
  1. (A)A catalyst does not alter the equilibrium constant of a reaction ...

    Text Solution

    |

  2. (A) NH(3) adsorbs more readily over activated charcoal than CO(2) (...

    Text Solution

    |

  3. (A) : Gases between themselves cannot form a colloidal solution. (R)...

    Text Solution

    |

  4. (A) Colloidal sols scatter light while true solutions do not. (R ) ...

    Text Solution

    |

  5. (A) Colloidal particles show Brownian Movement (R ) Brownian movemen...

    Text Solution

    |

  6. (A) A colloidal sol of As(2)S(3) is coagulated faster by 0.1 M BaCl(2)...

    Text Solution

    |

  7. (A)Colloidal solutions are stable but colloidal particles do not sett...

    Text Solution

    |

  8. (A) An emulsion becomes stable if saop is added to it. (R ) Saop c...

    Text Solution

    |

  9. (A) Milk is an example of water in oil emulsions (R ) Emulsions con...

    Text Solution

    |

  10. (A) Urease catalyses the hydrolysis of urea. (R ) All catalysts ar...

    Text Solution

    |

  11. (A) Enzyme catalysed reactions are of first order. (R ) Enzyme ne...

    Text Solution

    |

  12. (A)Adsorption is a surface phenomenon. (R ) During adsortion, residu...

    Text Solution

    |

  13. (A) Conversion of fresh precipitate to colloidal state is called pept...

    Text Solution

    |

  14. (A) Zeolites are good shape-selective catalysts (R ) Zeolites have ...

    Text Solution

    |

  15. (A)Increase in surface area increases rate of evaporaton (R ) Str...

    Text Solution

    |

  16. (A) Substances whose solutions cannot pass through filter paper are ca...

    Text Solution

    |

  17. (A) In chemisorption , adsorption keeps on increasing with temperature...

    Text Solution

    |

  18. (A)Lyophilic colloids are called as reversible sols. (R ) Lyophilic ...

    Text Solution

    |

  19. (A)A colloidal sol of Fe(OH)(3) formed by peptisation carries positive...

    Text Solution

    |

  20. (A) ZSM-5 is used as a catalyst is petrochemical industries . (R ) Z...

    Text Solution

    |