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An atom of an element has electronic str...

An atom of an element has electronic structure 2, 8, 1. Which statement is correct for it?

A

The valency of element is 7

B

It exists an triatomic molecule

C

The element is of a non-metallic nature

D

It forms a basic oxide

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The correct Answer is:
D
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MBD PUBLICATION-S- BLOCK ELEMENTS [ALKALI AND ALKALINE EARTH METALS]-QUESTION TYPE
  1. Which statement is false in case of alkali metals ?

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  2. Baking soda or baking powder is :

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  3. An atom of an element has electronic structure 2, 8, 1. Which statemen...

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  4. Sodium sulphate is soluble in water whereas barium sulphate is sparing...

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  5. Acidified solution of sodium thiosulphate are unstable because in thio...

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  6. Washing soda is:

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  7. Common table salt becomes moist and does not pour easily in rainy seas...

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  8. Which alkali metal is most metallic in character

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  9. Na2CO3 and NaHCO3 may be distinguished by treating their aqueous solut...

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  10. Sodium burns in dry air to give

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  11. Caesium oxide will be:

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  12. An inorganic compound first melts then resoldifies and then liberates ...

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  13. Which is industrially prepared by the electrolysis of aqueous NaCl ?

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  14. Which hydride is most stable ?

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  15. When NaCl is dissolved in water, the sodium ions are:

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  16. A and B are two salts. A with dilute HCl and A and B with conc. H2SO4 ...

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  17. Molten NaCl conducts electricity due to the presence of:

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  18. Which does not form double salt ?

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  19. Which of the following is not known ?

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  20. When NaCl is heated with conc. H2SO4 and solid K2Cr2O7, we get:

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