Home
Class 10
CHEMISTRY
When black copper oxide placed in a beak...

When black copper oxide placed in a beaker is treated with dilute HCl, its colour changes to

A

white

B

dark red

C

bluish green

D

no change

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • ACID, BASES AND SALTS

    MODERN PUBLICATION|Exercise EXERCISE|433 Videos

  • CARBON AND ITS COMPOUNDS

    MODERN PUBLICATION|Exercise EXERCISE|410 Videos

Similar Questions

Explore conceptually related problems

In the following , describe the sample space for the indicated experiment. One die of red colour, one of white colour and one of blue colour are placed in a bag. One die isselected at random and rolled, its colour and the number on its uppermost face is noted. Describe the sample space.

One die of red colour, one white and one of blue are placed in a bag. One die is selected at random and rolled, its colour and the number on its uppermost face is noted. Describe the sample space .

What happen when:Magnesium is treated with dilute sulphuric acid?

When in the blue solution of copper sulphate, Zinc srtip is dipped, after some time colour changes to:

When a green iron salt is heated strongly, its colour finally changes to black and odour of burning sulphur is given out Name the type of reaction that takes place during the heating of iron salt.

When a green iron salt is heated strongly, its colour finally changes to black and odour of burning sulphur is given out Name the iron salt.

When a copper strip is placed in a solution of silver nitrate, copper nitrate and silver are formed . Name the reaction.

When a strip of copper is placed in the solution of silver nitrate, the solution become blue. Why ?

On heating copper powder in air, the surface of copper powder becomes coated with black CuO. How can this black be converted into brown copper? Write chemical equation for the reaction that occurs during the colour change.

Write a reaction when calcium oxide is treated with water.

MODERN PUBLICATION-ACID, BASES AND SALTS-EXERCISE
  1. Which of the following salts does not contain water of crystallisation...

    Text Solution

    |

  2. Which of the following is not true

    Text Solution

    |

  3. When black copper oxide placed in a beaker is treated with dilute HCl,...

    Text Solution

    |

  4. Which of the following acidic solutions having given pH values is most...

    Text Solution

    |

  5. pH of the solution having hydrogen ions concentration of 1M is

    Text Solution

    |

  6. The pH of a solution is 3. When its pH changes to 5, then H^(+) ion co...

    Text Solution

    |

  7. Which of the following is not a strong acid?

    Text Solution

    |

  8. One of the consituent of bakking powder is sodium hydrogen carbonate, ...

    Text Solution

    |

  9. What happens when Slaked lime reacts with chlorine?

    Text Solution

    |

  10. Metal hydrogen carbonates react with acids to give

    Text Solution

    |

  11. True/false Washing soda is Na2SO4. 10H2O

    Text Solution

    |

  12. Bleaching powder is obtained by passing Cl2 gas over slaked lime. True...

    Text Solution

    |

  13. Do basic solution also haveH^+ (aq) ions? If yes, then why are these b...

    Text Solution

    |

  14. True/false Copper sulphate solutoins turns red litmus blue.

    Text Solution

    |

  15. True/false Tamarind contains oxalic acid.

    Text Solution

    |

  16. Fill ups When dil HCl is added to black copper oxide, the solution bec...

    Text Solution

    |

  17. Fill ups Brine is a saturated solution of………………

    Text Solution

    |

  18. Fill ups Salts of strong acids and weak bases are…………….in nature.

    Text Solution

    |

  19. Fill ups Tooth pastes are generally…………..in nature.

    Text Solution

    |

  20. Fill ups The colour of universal indicator in very acidic solution is…...

    Text Solution

    |