MCQ
Aqua-regia is
- ✓$1 : 3$ conc. $HN{O_3}$ and conc. $HCl$
- B$1 : 2$ conc. $HN{O_3}$ and conc. $HCl$
- C$3 : 1$ conc. $HN{O_3}$ and conc. $HCl$
- D$2 : 1$ conc. $HN{O_3}$ and conc. $HCl$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$(A)$ $X = COOCH _3, Y = H _2 /$ Ni/heat
$(B)$ $X = CONH _2, Y = H _2 /$ Ni/heat
$(C)$ $X = CONH _2, Y = Br _2 / NaOH$
$(D)$ $X = CN , Y = H _2 /$ Ni/heat
| $[HI]$, $M$ | rate, $Ms^{-1}$ |
| $0.0500$ | $8.80 \times {10^{ - 10}}$ |
| $0.1000$ | $3.52 \times {10^{ - 9}}$ |
| $0.1500$ | $7.92 \times {10^{ - 9}}$ |
