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Boron cannot from which one of the follo...

Boron cannot from which one of the following anions?

A

`BF_(6)^(3-)`

B

`BH_(4)^(-)`

C

`B(OH)_(4)^(-)`

D

`BO_(2)^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A
Due to absence of d-orbitals , B cannot extend its covalency beyond 4 and hence it can form `BF_(4)^(-), [B(OH)_(4)]^(-)` and `BO_(2)^(-)` but not `BF_(6)^(3-)`.
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PRADEEP-SOME p-BLOCK ELEMENTS-Competition Focus (JEE( Main and Advanced)/Medical Entrance) (1. Multiple Choice Questions) I. Group 13 Elements
  1. Corundum is "…………" mineral of aluminium

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  2. Which is the following metallic oxides exhibit amphoteric nature ?

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  3. Boron cannot from which one of the following anions?

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  4. Which one of following elements is unable to from MF(6)^(3-) ion?

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  5. Predict the correct shape of BH(4)^(-)

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  6. Which of the following pairs has almost same radii ?

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  7. The increasing order of atomic radii of the following group 13 element...

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  8. The correct order of atomic radii in group 13 elements is

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  9. The stability of +1 oxidation state among Al, Ga, In and Tl increases ...

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  10. The +1 oxidation state of thallium is more stable than its +3 oxidati...

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  11. The ion(s) that act/s as oxidizing agent in solution is/are

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  12. For BCl(3), AlCl(3) and GaCl(3) the increasing order of ionic characte...

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  13. For the properties mentioned, the correct trend for the different spec...

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  14. Which of the following is similar to graphite ?

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  15. Which of the following is known as inorganic graphite?

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  16. Heating an aqueous solution of aluminium chloride to dryness will give

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  17. Al(2)O(3) becomes anhydrous AlCl(3) upon heating

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  18. Conc. HNO(3) can be stored in a container made of

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  19. Which of the following statement is incorrect?

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  20. When metal 'M' is treated with NaOH, a white gelatinous precipitate ...

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