MCQ
A $0.1\, M$ solution of $HF$ is $1\%$ ionized. What is the $K_a$
- ✓${10^{ - 5}}$
- B${10^{ - 4}}$
- C$3 \times {10^{ - 5}}$
- D$3 \times {10^{ - 4}}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$C(s) + {O_2}(g) \to C{O_2}(g),\Delta H = - 394\,kJ$
$2{H_2}(g) + {O_2}(g) \to 2{H_2}O(l),\,\Delta H = 568\,kJ$
$C{H_4}(g) + 2{O_2}(g)\,\, \to \,\,C{O_2}(g) + 2{H_2}O(l)$ $\Delta H = - 892\,kJ$ Heat of formation of $C{H_4}$ is.....$kJ$