Home
Class 10
CHEMISTRY
(a) Why are metals not generally found i...

(a) Why are metals not generally found in their free state ?
(b) If a strip of aluminium with scratched surface is dipped in an aqueous solution of copper sulphate for little time, the surface of the strip becomes brownish. What is the reason for this ? Write the balanced chemical equation for the reaction.

Promotional Banner

Topper's Solved these Questions

  • METALS AND NON-METALS

    DINESH PUBLICATION|Exercise Long Answer Questions|23 Videos

  • METALS AND NON-METALS

    DINESH PUBLICATION|Exercise HOTS|7 Videos

  • METALS AND NON-METALS

    DINESH PUBLICATION|Exercise Very Short Answer Questions|67 Videos

  • CHEMICAL REACTIONS AND EQUATIONS

    DINESH PUBLICATION|Exercise Multiple Choice Questions|18 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS

    DINESH PUBLICATION|Exercise PBQs|28 Videos

Similar Questions

Explore conceptually related problems

A copper plate was dipped into a solution of AgNO_(3) . After sometime, a black layer was deposited on the copper plate. State the reason for it. Write the chemical equation for the reaction involved.

Explain why calcium metal after reacting with water starts floating on its surface. Write the chemical equation for the reaction.

What happens when a piece of : Silver metal is added to copper sulphate solution? Also, write the balanced chemical equation if the reaction occurs.

A copper plate was dipped in AgNO_(3) solutions. After certain time, silver from the solution was deposited on the copper plate. State the reason whhy it happened. Give the chemical equation fo the reaction involved.

When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.

DINESH PUBLICATION-METALS AND NON-METALS-Short Answer Questions
  1. Give reason for the following (i) Iron grills are frequently painte...

    Text Solution

    |

  2. In one method of rust prevention, the iron is not coated with anything...

    Text Solution

    |

  3. Compound X and aluminium are used to join railway tracks. (a) Idemjfy ...

    Text Solution

    |

  4. An ore on treatment with dilute hydrochloric acid produces brisk effer...

    Text Solution

    |

  5. State the property utilized in the following : (i) Graphite in maki...

    Text Solution

    |

  6. (i) Carbonate and sulphide ores are usually converted into oxides duri...

    Text Solution

    |

  7. The reaction of metal 'X' with Fe(2)O(3) is highly exothermic and is u...

    Text Solution

    |

  8. Aluminium oxide and zinc oxide react with both acids are bases to prod...

    Text Solution

    |

  9. Describe an activity to show that metals are good conductors of electr...

    Text Solution

    |

  10. (a) In the electrorefining of impure copper metal, what are used as ca...

    Text Solution

    |

  11. (a) What is an alloy ? How is it prepared ? Give two examples of alloy...

    Text Solution

    |

  12. Write one example each of the following metals : (a) Most malleable...

    Text Solution

    |

  13. A metal 'P' when exposed to moist air for longer period of times, lose...

    Text Solution

    |

  14. Name the constituents elements of the alloys (i) Brass (ii) Bronze (ii...

    Text Solution

    |

  15. Hydrogen gas is not evolved when most metals react with nitric acid. S...

    Text Solution

    |

  16. (a) Why are metals not generally found in their free state ? (b) If...

    Text Solution

    |

  17. Write balanced chemical equation for the reactions taking place when ...

    Text Solution

    |

  18. An element 'X' burns in oxygen to form an electrovalent compound XO. S...

    Text Solution

    |

  19. A metal E is stored under kerosene. When a small piece of it is left o...

    Text Solution

    |

  20. Write the names and symbols of two most reactive metals. Explain by dr...

    Text Solution

    |