Question:

Analysis shows that an oxide ore of nickel has formula $Ni_{0.98} O_{1.00}$ The percentage of nickel as $Ni^{3+}$ ions is nearly

Updated On: Jul 6, 2022
  • 2
  • 96
  • 4
  • 98
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The Correct Option is C

Solution and Explanation

Let no. of nickel ions $= 98$ $\therefore$ No. of oxide ions $= 100 $ Total negative charge on $O^{2-}$ ions $= 2 \times 100 = 200$ Let no. of $Ni^{3+}$ ions $= x$ $\therefore$ No. of $Ni^{2+}$ ions $= 98 - x$ $x \times 3 + (98 - x) \times 2 = 200$ $3x - 2x = 200 - 196$ $x = 4$ Percentage of nickel as $Ni^{3+} = \frac{4}{98} \times 100$ $ = 4.08$
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Notes on The solid state

Concepts Used:

Solid State

Solids are substances that are featured by a definite shape, volume, and high density. In the solid-state, the composed particles are arranged in several manners. Solid-state, in simple terms, means "no moving parts." Thus solid-state electronic devices are the ones inclusive of solid components that don’t change their position. Solid is a state of matter where the composed particles are arranged close to each other. The composed particles can be either atoms, molecules, or ions. 

Solid State

Types of Solids:

Based on the nature of the order that is present in the arrangement of their constituent particles solids can be divided into two types;

  • Amorphous solids behave the same as super cool liquids due to the arrangement of constituent particles in short-range order. They are isotropic and have a broad melting point (range is about greater than 5°C).
  • Crystalline solids have a fixed shape and the constituent particles are arranged in a long-range order.