Home
Class 12
CHEMISTRY
Colour of potassium iodide solution cont...

Colour of potassium iodide solution containing starch turns blue when chlorine water is added why?

Text Solution

Verified by Experts

Chlorine being more reactive displaces iodine from KI. Iodine is absorbed by starch and thus blue colour is developed
`2KI+Cl_(2)to2KCl+I_(2)`
`I_(2)+` Stacrh `to` Blue colour
Promotional Banner

Topper's Solved these Questions

  • ELECTRO CHEMISTRY

    NARAYNA|Exercise W.E-2|1 Videos

  • ELECTRO CHEMISTRY

    NARAYNA|Exercise W.E-3|1 Videos

  • 15TH GROUP ELEMENTS

    NARAYNA|Exercise EXERCISE - 4 (NCERT EXEMPLERS/HOTs)|27 Videos

Similar Questions

Explore conceptually related problems

Iodine dissolves more in KI solution than in water. Why? (b) Colour of KI solution containing starch turns deep blue when chlorine water is added. Explain.

Starch-iodide solution is

Ozone when reacts with potassium iodide solution liberates certain product, which turns starch paper blue. The liberated substance is …………….

The potassium ferrocyanide solution gives a prussian blue colour when added to

The potassium ferrocyanide solution gives a prussian blue color when added to ?

NARAYNA- ELECTRO CHEMISTRY-SUBJECTIVE QUESTIONS
  1. Colour of potassium iodide solution containing starch turns blue when ...

    Text Solution

    |

  2. Copper sulphate solution (250 ML) was electrolyzed using a platinum an...

    Text Solution

    |

  3. Chromium metal can be plated out from an acidic solution containing Cr...

    Text Solution

    |

  4. Electrolysis of a solution of MnSO(4) in aqueous sulphuric acid is a m...

    Text Solution

    |

  5. electricity. In the process H(2) gas is oxidized at the anode and O(2)...

    Text Solution

    |

  6. An aqueous solution of NaCl on electrolysis gives H(2(g))Cl(2(g)) and ...

    Text Solution

    |

  7. A current of 1.70 ampere is passed through 300mL of 0.160M solution of...

    Text Solution

    |

  8. An acidic solution of Cu^(2+) salt contaning 0.4 of Cu^(2+) is electro...

    Text Solution

    |

  9. Calculate the quantity of electricity that would be required to reduce...

    Text Solution

    |

  10. During the discharge of a lead storage battery, the density of sulphur...

    Text Solution

    |

  11. How many grams of silver could be plated out on a serving tray by elec...

    Text Solution

    |

  12. Compute standard e.m.f. of cell Zn((s))+CO^(2+)rarr CO((s))+Zn^(2+) ...

    Text Solution

    |

  13. A solution containing 4.5mM of Cr(2)O(7)^(2-) and 15mM of Cr^(3+) show...

    Text Solution

    |

  14. Calculate the equilibrium constant for the reaction : Fe^(2+)+Ce^(4+)h...

    Text Solution

    |

  15. The following electrochemical cell has been set up. Pt((I))|Fe^(3+),...

    Text Solution

    |

  16. Zinc granules are added in excess to 500 mL of 1M Ni(NO(3))(2) solutio...

    Text Solution

    |

  17. The standard reduction potential for Cu^(2+)//Cu is +0.34V. Calculate ...

    Text Solution

    |

  18. The standard reduction potential of Cu^(2+)|Cu and Ag^(o+)|Ag electrod...

    Text Solution

    |

  19. A silver electrode is immersed in saturated Ag(2)SO(4(aq)). The potent...

    Text Solution

    |

  20. The standard reduction potential at 25^(@)C of the reaction 2H(2)O+2...

    Text Solution

    |

  21. An excess of liquid mercury is added to an acidicfied solution of 1.0x...

    Text Solution

    |