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Give reason for the following : a. The...

Give reason for the following :
a. The first ionisation enthalpy of carbon carbon is greater than that of boron, whereas the reverse is true fore the second ionisation enthalpy .
b. Solid carbon dioxide is known as dry ice .
c. Why does not silicon form an analogue of graphite ?

Text Solution

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The correct Answer is:
NA
The first ionisation energy of carbon is greater than the same of boron as predicted from periodic trend. However, for 2nd

ionisation trend is reversed due to stability of completely filled `2s` - orbital of `B^(+)`
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Give reason for the following : a. The first ioisation eathalpy of carbon carbon is greater than that foboron, whereas the reverse is true fore the second ionisation enthalpy . b. Solid carbon dioxie is known as dry ice . c. Why does not silicon form an analogue fo graphite ?

The first ionization enthalpy of carbon is greater than that of boron, whereas the reverse is true for second ionization enthalpy. Explain.

Why the first ionisation energy of carbon atom is greater than that of boron atom whereas, the reverse is true for the second ionisation energy.

Why is solid carbon dioxide known as dry ice ?

Give reason for the following in one or two sentences : ''Solid carbon dioxide is known as dry ice.''

The first ionisation energy of first atom is greater than that of second atom, whereas reverse order is true for their second ionisation energy. Which set of elements is in accordance to above statement?