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Chemistry · PYQ NEET UG 2019(2)
हिन्दीFormula of nickel oxide with metal deficiency defect in its crystal is \( \mathrm{Ni_{0.98}O} \). The crystal contains \( \mathrm{Ni^{2+}} \) and \( \mathrm{Ni^{3+}} \) ions. The fraction of nickel existing as \( \mathrm{Ni^{2+}} \) ions in the crystal is
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Correct answer · Option B
\( 0.96 \)
Explanation
Let fraction of \( \mathrm{Ni^{2+}} \) be \( x \), then \( \mathrm{Ni^{3+}} \) is \( 0.98 - x \). Balancing total charge: \( 2x + 3(0.98 - x) = 2 \implies x = 0.94 \). Fraction = \( 0.94 / 0.98 \approx 0.96 \).
