Advertisements
Advertisements
प्रश्न
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Advertisements
उत्तर
When aluminium is dipped in nitric acid a layer of aluminium oxide is formed on the metal. This happens because nitric acid is a strong oxidizing agent. The layer of aluminium oxide prevents further reaction of aluminium. Due to this, the reactivity of aluminium decreases.
APPEARS IN
संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Which of the two metals is more reactive: copper or silver?
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
What special name is given to substances like aluminium oxide.
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
Name one metal more reactive and another less reactive than hydrogen.
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O?
(b) State whether element E is a metal or a non-metal.
(c) Give one example of an element like E.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
