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The black oxide of copper is...

The black oxide of copper is _____________

A

CuO

B

`Cu_2O`

C

`CuO_2`

D

None

Text Solution

Verified by Experts

The correct Answer is:
A
CuO ( Copper (II) Oxide )
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -ADDITIONAL QUESTIONS & ANSWERS ( FILL IN THE BLANKS )
  1. is silvery white metal.

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  2. When aluminium is used as a reducing agent , the process is called pr...

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  3. The black oxide of copper is

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  4. Iron containing 2-4.5% of carbon is called

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  5. metal is alloyed with gold and silver for making coins and jewels.

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  6. is used for dental filling .

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  7. Brass is an alloy of and .

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  8. is the metal widely used for anodizing .

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  9. Transition metals fall under groups to .

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  10. The distance between the centre of its nucleus and the outermost sh...

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  11. Atomic radius, ionic radius, electron affinity are called properties ...

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  12. The atomic radius of non-metallic elements is known as .

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  13. Along the period , from left to righ , the atomic radius of the elemen...

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  14. Along the groups , from the top to bottom, the atomic radius .

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  15. As the shell number increases, the distance between the valence shell...

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  16. More and more positive charges impose a over the electrons.

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  17. is also called ionisation enthalpy.

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  18. Ions are formed when an atom electrons.

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  19. The size of a cation is always than its corresponding neutral atom.

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  20. and lose the single electron from their outermost energy level teo fo...

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