NTA Abhyas JEE Main2020ChemistrySome Basic Concepts of ChemistryPractice

Analysis show that nickel oxide consists of nickel ion with 96% ions having d 8 configuration and 4% having of d 7 configuration. Which amongst the following best represents the formula of the oxide.

Options

AN i 1.02 O 1.00
BN i 0.96 O 1.00
CN i 0.98 O 0.98
DN i 0.98 O 1.00

Correct answer

D. N i 0.98 O 1.00

Step-by-step solution

d 8 → N i + 2 , d 7 → N i + 3 Total charge of nickel 0.96 × 2 + 0.04 × 3 = 2.04 Number of O - 2 ion = 2.04 2 = 1.02 Formula of solid = N i O 1.02 = N i 0.98 O 1.00

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