Question 14 of 28beginner🧠 RememberMCQ1 mark

Ethane, with the molecular formula C₂H₆ has

Exercise: EXERCISES | Q: 1 | (Page 20)
For More Understanding

Explanation

Option B is correct. According to the context, ethane (C₂H₆) has two carbon atoms linked together with a single bond. The text states that 'Three valencies of each carbon atom remain unsatisfied, so each is bonded to three hydrogen atoms.' This means: 1 C-C bond + 3 C-H bonds from first carbon + 3 C-H bonds from second carbon = 7 covalent bonds in total.

Solution Steps

  1. Step 1: Ethane has 2 carbon atoms linked by 1 C-C single bond.

  2. Step 2: Each carbon atom is bonded to 3 hydrogen atoms (as stated in context: 'Each carbon atom bonded to three hydrogen atoms').

  3. Step 3: Total covalent bonds = 1 (C-C) + 3 (C-H from first C) + 3 (C-H from second C) = 7 bonds.

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