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ICSE Class X Mid-term 2025 : Chemistry

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PAWAR PUBLICSCHOOL, DOMBIVALI FIRST PRELIMINARY EXAMINATION 2024-25 SUBJECT: CHEMISTRY MARKS: 80 GRADE:10 TIME:2 HOURS DATE: 26.11.2024 Answers tothis Paper must be written on the separate sheet of paper. You willnot be allowed to write during the first 15 minutes. This time is to be spent in reading the question pape. The time given at the head of this Paper is the time allowed for writing the answers. Section Ais compulsory. Attempt any four questions from Section B. The intended marks for questions or parts of questions are given in brackets IJ: Ihis paper consists of Five(main) +Four (MC) printed pages. Youare expected to present your paper neatly in legible handwriting. SECTION A(40 Marks) Attempt all questions from this Section) Question 1 Refer to the MCQquestion paper given separately. [15] Question 2 (i) Match the Column A with Column B: [S] ColumnA (a) (b) Element with atomic no. 19 (d) (e) Sodium bisulphite Element with atomic no. 9 Sodium aluminate Calcium fluoride (1) (2) (3) (4) (6) (6) Column B Acid salt Non-metal Metal Amphoteric oxide Baeyer's process Hall Heroult's process (ii) Complete the following by choosing the correct answer from the bracket: (a) Cations are (oxidised reduced) ions due to the (gain/loss) of electrons by the neutral atom. (b) If a hydrocarbon has the formula of CsoHy8, then it is likely to ndergo a/an (addition/ substitution) reaction. [S] (c) Nikita wanted to gift her friend a decorative piece that is quite hard and strong, doesn't get corroded and can be polished. She selected a statue that matched her criteria as it was made of an alloy whose main (CuWAl) constituent was (d) The number of chain isomers possible for an alkane with 5 carbon atoms are (3/4). ..2

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