alleryWhich compound shows a double bond?
ACl2
BO2
CCH4
DNaCl
Answer & Solution
Correct answer: B. O2
1. Oxygen has six valence electrons and needs two more for an octet.
2. In O2 each atom shares two pairs (four electrons total).
3. Two shared pairs make a double bond.
4. Cl2 has a single bond, CH4 only single bonds, NaCl is ionic.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 2 'Chemical Bonding'_
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