Identify the correct statements from the following.
i. Melting points and boiling points of group 13 elements are much higher than those of corresponding group 14 elements
ii. SiO only exists at high temperatures
iii. 
does not exist
iv. Buckminster fullerene contain twelve 6 -membered carbon rings and twenty 5 - membered carbon rings.
Text Solution
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The melting and boiling points of group 13 elements are lower than those of corresponding group 14 elements due to higher atomic masses and greater number of bonds between the atoms of group 14 elements.
Thus, (i) is incorrect.
is less stable than 
so it exists only at highertemperatures. Thus, (ii) is correct.
does not exist as 
prefers +2 state rather than +4 state due to inert pair effect.
Thus, (iii) is correct
Buckminster fullerene contains 20 six-membered and 12 five-membered rings.
Thus, (iv) is incorrect.
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