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ICSE Class 10 Chemistry (Science Paper – 2) Solved Paper 2023
ICSE 2023 EXAMINATION QUESTION PAPER CHEMISTRY (SCIENCE PAPER – 2) Full Marks: 80 Time – Two Hours Answers to this Paper must…
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Question
Electrolytic refining of copper: anode, deposition and cathode reaction
Answer the following with reference to the electrolytic refining of copper: (a) What is used as the anode? (b) Where is pure…
Question
Calculate: percentage of phosphorus in Ca(H₂PO₄)₂ and empirical formula of C₈H₁₈
Calculate: (a) The percentage of phosphorus in the fertilizer super phosphate Ca(H2PO4)2 correct to 1 decimal point. (b) Write the empirical formula…
Question
Give a reason for each: (a) Ionisation potential decreases down a group. (b) Ionic compounds do not conduct electricity in the solid state. [2]
Give a reason for each: (a) Ionisation potential decreases down a group. (b) Ionic compounds do not conduct electricity in the solid…
Question
Name the following: (a) Organic compounds having the same molecular formula but different structural formulae. (b) A group of organic compounds in which successive members differ by a CH₂ group. [2]
Name the following: (a) Organic compounds with same molecular formula but different structural formula. (b) Group of organic compounds where the successive…
Question
State one relevant observation in each case: (a) To copper nitrate solution, add a few drops of sodium hydroxide solution and then excess sodium hydroxide solution. (b) Burning ammonia in excess oxygen. (c) Passing dry ammonia gas over heated lead(II) oxide. [3]
State one relevant observation for each of the following: (a) To the copper nitrate solution, initially few drops of sodium hydroxide solution…
Question
Choose the substances given in the box below to answer the following questions:
Choose the substances given in the box below to answer the following questions: Iron Magnesium sulphite Zinc Sodium sulphide Lead Ferric chloride…
Question
An organic compound has empirical formula CHCl₂ and relative molecular mass 168. Calculate its molecular formula. [2]
The Empirical formula of an organic compound is CHCl2. If its relative molecular mass is 168, what is its molecular formula? [At.…
Question
Define electronegativity and state Gay-Lussac’s law of combining volumes
Define / State: (a) Electronegativity. (b) Gay-Lussac’s law of combining volumes.
Question
Study the following observations and name the anions present in each reaction. (a) Copper turnings with concentrated sulphuric acid produce a reddish-brown gas. (b) A gas turns lead acetate paper silvery black. (c) A white precipitate with barium nitrate remains insoluble in hydrochloric acid. [3]
Study the following observations and name the anions present in each of the reactions. (a) When a crystalline solid ‘P’ is warmed…