The formation of sulphur trioxide from sulphur dioxide and oxygen is an _____ reaction.
Important Questions on Language of Chemistry and Transformation of Substances
A series of chemical reactions were carried out in a laboratory in the following way. At first zinc granules reacted with to form gas. Then hydrogen gas reacted with chlorine gas under diffused sunlight to form hydrogen chloride gas. Hydrogen chloride gas produced in this process was dissolved in water to form hydrochloric acid. Hydrochloric acid reacted with sodium hydroxide to form sodium chloride and water. Sodium chloride, thus, produced is first melted and then electricity is passed through it. Due to the passage of electricity through sodium chloride, sodium metal and chlorine gas are obtained.
Rahul was asked to arrange the above reactions in the order of combination, decomposition, displacement and double decomposition. His answer is given below.
(1) formation of gas.
(2) formation of hydrogen chloride gas.
(3) formation of sodium and chlorine from sodium chloride.
(4) formation of sodium chloride.
Which amongst the following orders given below is correct, according to you?
Arrange the following reactions in the given order, i.e., compound-element combination, compound-compound combination and element-element combination.
(1) Coke is burnt in an inadequate supply of air.
(2) The product formed in the reaction (1) is again burnt in the presence of oxygen.
(3) The product formed in the reaction (2) is treated with water.
An oxide X of carbon on treatment with oxygen gives Y which turns lime water milky and blue litmus to red. Predict the valencies of carbon in X and Y and what is the composition of milky precipitate formed?
