MCQ
The $pH$ of the solution is $4$ . The hydrogen ion concentration of the solution in mol/litre is
- A$9.5$
- ✓${10^{ - 4}}$
- C${10^4}$
- D${10^{ - 2}}$
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(Assume: Momentum is conserved when photon is absorbed. Use: Planck constant $=6.6 \times 10^{-34} J s$, Avogadro number $=6 \times 10^{23} mol ^{-1}$, Molar mass of $He =4 g mol ^{-1}$ )
