Lakhmir Singh and Manjit Kaur Solutions for Chapter: Metals And Non-Metals, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)

State and explain the reactions, if any, zinc with a solution of copper sulphate.

State and explain the reactions, if any, mercury with a solution of copper sulphate.

State an important property in which metal chloride $\mathrm{NaCl}$ and non-metal chloride ${\mathrm{PCl}}_3$ differ.

Why do a metal chloride and a non-metal chloride differ in their property?

If $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}, \mathrm{E}, \mathrm{F}, \mathrm{G}, \mathrm{H}, \mathrm{I}, \mathrm{J}$ and $\mathrm{K}$ represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?

Name a metal which does not react with cold as well as hot water but reacts with steam.

When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?

Name a metal which does not react with any physical state of water.