Chemistry
Answer the following questions with reference to the concentration of bauxite ore.
(a) Name the process used to concentrate the ore.
(b) Give a balanced chemical equation for the conversion of aluminium hydroxide to pure alumina.
Related Questions
An organic compound ‘X’ contains carbon, oxygen and hydrogen only. The percentage of carbon and hydrogen are 47.4% and 10.5% respectively. The relative molecular mass of ‘X’ is 76. Find the empirical formula and the molecular formula of ‘X’.
[Atomic weight: C = 12, O = 16, H = 1]Seema added a few pieces of copper turnings to a test tube containing concentrated acid P and she noticed that a reddish-brown gas evolved.
(a) Name the acid P used by Seema.
(b) Write a balanced chemical equation for the reaction that took place.
Draw the dot and cross structure of the following:
(a) An ionic compound formed when Mg reacts with the dilute HCl.
(b) A covalent compound formed when H2 reacts with Cl2.
(c) The positive ion produced when ammonia gas is dissolved in water.
[Atomic number: Mg = 12, Cl = 17, H = 1, N = 7]Acidulated water is electrolysed using platinum electrodes. Answer the following questions:
(a) Why is dilute sulphuric acid added to water?
(b) Write the reaction taking place at the cathode.
(c) What is the observation at the anode?