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ICSE Class X Board Exam 2017 : Chemistry

8 pages, 86 questions, 86 questions with responses, 151 total responses,

Aradhya Singh
Swaraj India Public School, Kanpur

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CHEMISTRY SCIENCE Paper 2 (Two hours) Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the Question Paper. The time given at the head of this paper is the time allowed for writing the answers. Section I is compulsory. Attempt any four questions from Section II. The intended marks for questions or parts of questions are given in brackets [ ]. SECTION I (40 Marks) Attempt all questions from this Section Question 1 (a) Fill in the blanks from the choices given in brackets: [5] (i) The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called _______________. (electron affinity, ionisation potential, electronegativity) (ii) The compound that does not have a lone pair of electrons is _______________. (water, ammonia, carbon tetra chloride) (iii) When a metallic oxide is dissolved in water, the solution formed has a high concentration of _______________ ions. (H+, H3O+, OH ) (iv) Potassium sulphite on reacting with hydrochloric acid releases ______________ gas. (Cl2, SO2, H2S) (v) The compound formed when ethene reacts with Hydrogen is _______________. (CH4, C2H6, C3H8) This Paper consists of 8 printed pages. T17 522 Copyright Reserved. Turn Over

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