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1 PRACTCE PAPER-8 PERIODIC TABLE, CHEMICAL BONDING, HCl, AMMONIA, ORGANIC CHEMISTRY and ELECTRYSIS Section I (40 Marks) Answer all the questions Question 1 a) Choose the correct answers from the list of words given below 5M (Electropositivity, Carboxylic acid, lone pair, Electronegativity, Chemical bonds, decarboxylation) i) An Organic compound containing - COOH GROUP. ii) The tendency to attract electrons to itself. iii) The electron pair which is present in the valence shell and does not participate in covalent bonding. iv) The tendency to lose electrons. v) Elimination of Carbon dioxide from Carboxylic acid group. b) Select the correct answers from the words given below: 5M i) An element X belongs to Group 2 of period 3. Then X has A) 3 valence electrons and 2 shells B) 2 valence electrons and 3 shells C) 2 valence electrons and 2 shells D) 1 valence electron and 2 shells ii) Ammonium chloride consists of A) Covalent and ionic bonds B) Ionic bonds only C) Covalent , ionic and coordinate covalent bonds D) Covalent and coordinate covalent bonds iii) Which of the following compound is not suitable for the preparation Ammonia by heating with an alkali? A) Ammonium sulphate B) Ammonium chloride C) Ammonium nitrate D) Ammonium sulphate and Ammonium chloride iv) Which of the following statement is not correct regarding electrolysis process: A) Cations get discharged at cathode B) Anions get oxidized at anode C) Metal deposits at anode D) Inert electrodes do not participate in electrolytic reaction. v) Aqua regia is a mixture of A) 1 volume of Conc. HCl and 3 volumes of Conc. HNO3 B) 3 volume of Conc. HCl and 1 volumes of Conc. HNO3 C) 1 volume of Conc. HCl and 1 volumes of Conc. HNO3 D) 1 volume of Conc. HCl and 3 volumes of Conc. H2SO4 c) Name the following. 5M i) The gas which gives white dense fumes with Ammonia gas. ii) The element with highest electronegativity. iii) The electrolyte used in the electroplating with Silver metal. iv) The bond formed by sharing of electrons. v) The common name for the Hydrocarbons with general formula CnH2n. d) i) 40 lit. of Hydrogen is burnt in presence of 25 lit. of Chlorine gas. 2M H2 + Cl2 2HCl Find A) The volume of Hydrogen gas unused.
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