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Oxides formed by p-block elements may be...

Oxides formed by `p`-block elements may be
`(i)` basic
`(ii)` acidic
`(iii)` amphoteric
`(iv)` neutral

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(c) Borax is a salt of a strong base (NaOH) and a weak acid `(H_(3)BO_(3))`. It is, therefore, basic in nature.
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The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., -2 normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of -2 . (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has -1 oxidation number. They contain (O -O)^(2-) unit. (ii) Superoxodes : These oxides contain (O-O)^(-1) unit, i.e., each O-atom has oxidation number -1//2 . (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains amphoteric oxides ?

The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on the basis of oxygen content. (a) Normal oxides : These oxides which contain oxygen atom as permitted by the normal oxidation number, i.e., -2 normal oxide may be acidic, basic, amphoteric or neutral. (b) Polyoxides : The oxides which contain oxygen atoms different than those permitted by the normal oxidation number of -2 . (i) Peroxides : Two oxygen atoms are linked to each other and oxyegen has -1 oxidation number. They contain (O -O)^(2-) unit. (ii) Superoxodes : These oxides contain (O-O)^(-1) unit, i.e., each O-atom has oxidation number -1//2 . (c) Suboxides : These contain low content of oxygen than expected. (d) Mixed oxides : These oxides are made of two simpler oxides. Which of the following pairs contains neutral oxides ?

NCERT ENGLISH-THE P-BLOCK ELEMENTS -EXERCISE
  1. Explain structures of diborane and boric acid.

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  2. What happens when (a) Borax is heated strongly, (b) Boric acid is ...

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  3. Explain the following reactions (a) Silicon is heated with methyl ch...

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  4. Give reasons : (i) Conc. HNO(3) can be transported in aluminium con...

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  5. Explain why is there a phenomenal decrease in ionisation enthalpy from...

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  6. How would you explain the lower atomic radii of Ga as compared to Al?

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  7. What are allotropes? Sketch the structure of two allotropes of carbon ...

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  8. a. Classify following oxides as neutral, acidic, basic or amphoteric: ...

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  9. In some of the reactions, thallium resembles aluminium whereas in othe...

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  10. When metal X is treated with sodium hydroxide, a white precipitate (A)...

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  11. What do you understand by (a) inert pair effect (b) allotropy and (c...

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  12. A certain salt (X) gives the following tests : (a) Its aqueous solut...

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  13. Write balanced equations for: a.BF(3)+LiHto b.B(2)H(6)+H(2)Oto c...

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  14. Give one method for industrial preparation and one for laboratory prep...

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  15. Oxides formed by p-block elements may be (i) basic (ii) acidic (...

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  16. Boric acid is polymeric due to

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  17. The type of hybridisation of boron in diborane is (a) sp , (b) sp^(...

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  18. Thermodynamically the most stable form of carbon is (a) diamond , (b...

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  19. Elements of group 14 (a) exhibit oxidation state of +4 only (b) ex...

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  20. If the starting material for the manufacture of silicones is RSiCl(3),...

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