See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

With the help of data given following thermochemical equations:    2 2 6 1 2C s 3H g C H g H ?     … (a)    2 3 8 2 3C s 4H g C H g H ?     … (b) (i)    2 2 2 1 H g O g H O H