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A shining metal 'X' on heating gives cop...

A shining metal 'X' on heating gives copper (II) oxide or cupric oxide. The metal 'X' is

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DINESH PUBLICATION-METALS AND NON-METALS-Very Short Answer Questions
  1. The electronic configuration of an elements 'E' (Z = 16) is 2, 8, 6. W...

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  2. Alloys are used in electrically heating devices rather that pure metal...

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  3. A shining metal 'X' on heating gives copper (II) oxide or cupric oxide...

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  4. Why do silver articles become black after some time ?

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  5. Name a metal other than aluminium that is covered with a layer of oxid...

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  6. What is the common feature in the electronic configuration of metal at...

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  7. Name one metal and one non-metal which exist in liquid state at room t...

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  8. What changes do you observe in the iron nails and colour of copper sul...

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  9. What are amphoteric oxides? Give two examples of amphoteric oxides.

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  10. Name a non-metal which is lustrous and a metal which is non-lustrous.

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  11. Give the electronic configuration of an element having atomic number 1...

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  12. A non-metal X exists in two different forms Y and Z. Y is hardest natu...

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  13. Aluminium occurs in the combined state while gold does not. Why ?

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  14. If copper metal is heated over a flame, it develops a coating. What is...

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  15. Why does not stainless steel get rusted easily ?

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  16. Why can we use gold and platinum in jewellery ?

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  17. Give chemical names of the two salts belonging to sodium family.

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  18. Name any one alloy made from (i) a metal and a non-metal (ii) two meta...

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  19. Why do we apply paint on iron articles?

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  20. Explain why calcium metal after reacting with water starts floating on...

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