Home
Class 11
CHEMISTRY
Li is used in photoelectric cells....

Li is used in photoelectric cells.

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • THE s - BLOCK ELEMENTS

    ICSE|Exercise FILL IN THE BANKS. TYPE QUESTIONS|25 Videos

  • THE s - BLOCK ELEMENTS

    ICSE|Exercise ASSERTION-REASON TYPE QUESTIONS |5 Videos

  • THE s - BLOCK ELEMENTS

    ICSE|Exercise OBJECTIVE (MULTIPLE CHOICE) TYPE QUESITONS (Choose the correct option in the following questions)|57 Videos

  • STRUCTURE OF ATOM

    ICSE|Exercise NCERT Textbook Exercises|67 Videos

Similar Questions

Explore conceptually related problems

K and Cs are used in photoelectric cells. K and Cs emit electrons on exposure to light.

Alkali metals used in photoelectric cells

Why are potassium and caesium, rather lithium used in photoelectric cells?

The metal used in photoelectric cell is-

Why cesium can be used in photoelectric cell, while lithium cannot be ?

A light beam containing a number of wavelengths is used in an photoelectric experiment. The stopping potential :

A point source of light is used in a photoelectric effect. If the source is moved farther from the emitted metal, the stopping potential

Why caesium and potassium are used as electrodes in photoelectric cells ?

10^-3 W of 5000A light is directed on a photoelectric cell. If the current in the cell is 0.16muA , the percentage of incident photons which produce photoelectrons, is

Why is a photoelectric cell also called an electric eye?

ICSE-THE s - BLOCK ELEMENTS-TRUE OR FALSE. TYPE QUESTIONS (State whether the following statements are True or False:
  1. The density of alkali metals increases from Li to Cs.

    Text Solution

    |

  2. 'Each alkali metal is the most electropositive element in its period'....

    Text Solution

    |

  3. The correct order of hydration enthalpies of alkali metal ions is:

    Text Solution

    |

  4. Li is used in photoelectric cells.

    Text Solution

    |

  5. K, Rb and Cs form mainly superoxides.

    Text Solution

    |

  6. Why are lithium halides partially covalent ? Explain with examples.

    Text Solution

    |

  7. Inspite of very high ionisation energy, lithium is the strongest reduc...

    Text Solution

    |

  8. When an alkali metal dissolves in liquid ammonia the solution can acqu...

    Text Solution

    |

  9. The densities of alkaline earth metals are much smaller than those of ...

    Text Solution

    |

  10. Why are the second ionisation energies of alkaline earth metals much s...

    Text Solution

    |

  11. Why do alkaline earth metals and their compounds impart characteristic...

    Text Solution

    |

  12. The flame test with a salt P gave a brick red flame. What is the catio...

    Text Solution

    |

  13. Be(OH)2 is

    Text Solution

    |

  14. BaCl2 is a low melting volatile solid.

    Text Solution

    |

  15. Assertion : Among alkaline earth metals, Be predominantly forms covale...

    Text Solution

    |

  16. Why do lithium and sodium not occur in free state in nature ?

    Text Solution

    |

  17. Lithium forms alloys with a number of metals. Why?

    Text Solution

    |

  18. Sodium acts as a strong reducing agent. Why?

    Text Solution

    |

  19. Hydrated magnesium chloride on heating gives magnesium oxide.

    Text Solution

    |

  20. Plaster of Paris is chemically calcium sulphate monohydrate.

    Text Solution

    |