Chemistry
State one relevant observation for each of the following reactions:
(i) Addition of ethyl alcohol to acetic acid in the presence of concentrated Sulphuric acid.
(ii) Action of dilute Hydrochloric acid on iron (II) sulphide.
(iii) Action of Sodium hydroxide solution on ferrous sulphate solution.
(iv) Burning of ammonia in air.
(v) Action of concentrated Sulphuric acid on hydrated copper sulphate.
Related Questions
Identify the substance underlined, in each of the following cases:
(i) Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.
(ii) The electrolyte used for electroplating an article with silver.
(iii) The particles present in a liquid such as kerosene, that is a non electrolyte.
(iv) An organic compound containing -- COOH functional group.
(v) A solid formed by reaction of two gases, one of which is acidic and the other basic in nature.
Write a balanced chemical equation for each of the following:
(i) Action of cold and dilute Nitric acid on Copper.
(ii) Reaction of Ammonia with heated copper oxide.
(iii) Preparation of methane from iodomethane.
(iv) Action of concentrated sulphuric acid on Sulphur.
(v) Laboratory preparation of ammonia from ammonium chloride.
(i) Draw the structural formula for each of the following:
- 2, 3 ā dimethyl butane
- Diethyl ether
- Propanoic acid
(ii) From the list of terms given, choose the most appropriate term to match the given description.
(calcination, roasting, pulverisation, smelting)
- Crushing of the ore into a fine powder.
- Heating of the ore in the absence of air to a high temperature.
(i) Calculate the number of gram atoms in 4.6 grams of sodium (Na = 23).
(ii) Calculate the percentage of water of crystallization in CuSO4.5H2O (H = 1, O = 16, S = 32, Cu = 64)
(iii) A compound of X and Y has the empirical formula XY2. Its vapour density is equal to its empirical formula weight. Determine its molecular formula.