5 Questions
Why does nitric acid not release H2 gas when it reacts with a metal?
Nitric acid acts as a strong oxidising agent and oxidises the released H2 gas to H2O. It is reduced to either N2O, NO2, or NO.
Why is copper used to make hot water tanks instead of steel?
Copper is a better conductor of heat compared to steel, making it ideal for hot water tanks.
Provide an example of a metal that can be easily cut with a knife and a metal that is a liquid at room temperature.
(i) Sodium (easily cut with a knife) (ii) Mercury (liquid at room temperature)
Why do non-metals not displace hydrogen from dilute acids?
Non-metals cannot give electrons to the hydrogen ions of the acid to reduce them to hydrogen gas, as they are acceptors of electrons.
Name a metal that is preserved in kerosene and a lustrous colored non-metal.
(a) Sodium (preserved in kerosene) (b) Iodine (lustrous colored non-metal)
Test your knowledge of metals and non-metals with this quiz! Explore why metals do not release H2 gas when reacting with dilute nitric acid, and learn about the properties of copper and steel in relation to hot water tanks.
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