Question:
For two ionic solids CaO and KI, identify the wrong statement amongst the following :
For two ionic solids CaO and KI, identify the wrong statement amongst the following :
Updated On: Jul 6, 2022
- The lattice energy of CaO is much large than that of KI
- KI is more soluble in water
- KI has higher melting point
- CaO has higher melting point
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The Correct Option is C
Solution and Explanation
CaO has higher lattice energy because of higher charge on $ {Ca^{2+}}$ and $ {O^{2-}}$, which results in higher attraction. KI is more soluble in water because of low lattice energy and higher hydration energy. Clearly (c) is wrong because CaO has higher melting point as compared to KI.
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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.
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.