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 Multiple Choice QuestionsShort Answer Type

11.

What is the structure of BO subscript 3 superscript minus ion?

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12.

Name a hydride of boron which is used as reducing agent in organic chemistry. 

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13.

Does a molecule of BH3 exist?

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14.

What is relative stability of +1 oxidation state in group 13.

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15.

Are all the B-H bonds in diborane equivalent?


No, there are two types of bonds in diborane, normal covalent bonds and three centred electron pair bond. 

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16.

What is tincal ?

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17.

What is tau or banana bond?

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18.

Name two elements used as semiconductors in electronic devices.

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19.

Why does boron not form B+3?

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20.

Arrange BCl3, BBr3 and BF3 in the decreasing order of Lewis acid character.

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