ISC Class 12 Chemistry Question Paper. Sample papers and question papers for ICSE and ISC students. These question papers have been collected by the best teachers from ICSE and ISC schools. Students should download and practice these papers to gain better marks in examinations.
ISC Board Question Paper Class XII – 2009
Chemistry (Theory)
(Candidates are allowed additional 15 minutes for only reading the paper. Thay must NOT start writing during this time)
General Instruction:
(i). All working including rough work should be done on the same sheet as, and adjacent to the rest of the answer.
(ii). The intended marks for questions or parts of questions are given in brackets []. (Material to be supplied: Log tables including Trigonometric functions)
(iii). A list of useful physical constants is given at the end of this paper.
PART I
Q1. (a) Correct the following statements by changing the underlined part of the sentence. (Do not change the whole sentence) : [5]
(i) For all spontaneous processes the change in entropy is zero.
(ii) Formaldehyde undergoes Cannizzaro’s reaction since it has one alpha hydrogen atom.
(iii) In a co-ordination complex, donation of electron pair takes place from the central metal atom to the ligands.
(iv) An aqueous solution of sodium sulphate is acidic in nature.
(v) The solubility product of sliver chloride in water decreases on addition of potassium chloride to the solution.
(b) Complete the following statements by selecting the correct alternative from the choices given: [5]
(i) The number of Faradays required to reduce one mol of (Cu)+2 to metallic copper is:
(a) One (b) Two
(c) Three (d) Four.
(ii) When oxalic acid is heated with glycerol we get:
(a) Formic acid (b) Acetic acid
(c) Lactic acid (d) Tartaric acid.
(iii) The molecular weight of sodium chloride determined by measuring the osmotic pressure of its aqueous solution is:
(a) Double the theoretical value
(b) Same as the theoretical value
(c) Half the theoretical value
(d) Three times the theoretical value.
(iv) In ethyne molecule there are:
(a) Only three sigma bonds
(b) Only three pi bonds
(c) Three sigma bonds and two pi bonds
(d) Three pi bonds and two sigma bonds.
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