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(i) State any two reasons for carbon forming a large number of compounds. Why does carbon form compounds mainly by covalent bonds ?
(ii) Identify the compound which contains aldehyde as its functional group :
$\ce{C3H7OH}$, $\ce{C3H7Cl}$, $\ce{C2H5CHO}$, $\ce{CH3COCH3}$
(ii) Identify the compound which contains aldehyde as its functional group :
$\ce{C3H7OH}$, $\ce{C3H7Cl}$, $\ce{C2H5CHO}$, $\ce{CH3COCH3}$
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(i)
$\bullet$ 1) Carbon has unique ability of catenation in which it can form bonds with other atoms of carbon. ($\frac{1}{2}$ Mark)
2) Carbon is tetravalent and small in size, due to which it can form strong and stable bonds with other atoms. ($\frac{1}{2}$ Mark)
$\bullet$ Carbon has four electrons in its outermost shell. It cannot form $\ce{C^{4+}}$ or $\ce{C^{4-}}$ ions as they are highly unstable. So, it shares its electrons with other atoms and forms covalent bonds. (1 Mark)
(ii) $\ce{C2H5CHO}$ (1 Mark)
$\bullet$ 1) Carbon has unique ability of catenation in which it can form bonds with other atoms of carbon. ($\frac{1}{2}$ Mark)
2) Carbon is tetravalent and small in size, due to which it can form strong and stable bonds with other atoms. ($\frac{1}{2}$ Mark)
$\bullet$ Carbon has four electrons in its outermost shell. It cannot form $\ce{C^{4+}}$ or $\ce{C^{4-}}$ ions as they are highly unstable. So, it shares its electrons with other atoms and forms covalent bonds. (1 Mark)
(ii) $\ce{C2H5CHO}$ (1 Mark)