MCQ
In acetylene molecule, the two carbon atoms are linked by
- ✓One sigma bond and two pi bonds
- BTwo sigma bonds and one pi bond
- CThree sigma bonds
- DThree pi bonds
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Statement $I$ : The metallic radius of $\mathrm{Na}$ is $1.86 \mathrm{~A}^{\circ}$ and the ionic radius of $\mathrm{Na}^{+}$is lesser than $1.86 \mathrm{~A}^{\circ}$.
Statement $II$ : Ions are always smaller in size than the corresponding elements.
In the light of the above statements, choose the correct answer from the options given below :
