MCQ
The deviation of bond angle in cyclopropane:
- A49°.5′
- B24°.44′
- C−5°.16′
- D−9°.33′
Explanation:
Deviation of the bond angle in cyclopropane is 109.5 - 60 = 49.5.
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Product $(A)$ is
What is the standard free energy change for the reaction ${H_2}(g) + 2\,C\,(s) \to {C_2}{H_2}(g)$ .....$kJ$
Assertion $(A)$: Among group $13$ elements, boron's melting point is unusually high $(2453 \mathrm{~K})$.
Reason $(R):$ Solid boron has a strong crystalline lattice.
In the context of the above statements, choose the correct answer from the following options: