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ICSE Class X Mid-term 2025 : Chemistry (St. Xavier's Institution (SXI), Panihati, Kolkata)

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ANALYTICAL CHEMISTRY (CLASS 10) WORKSHEET 1. a. b. c. d. e. f. g. h. i. j. 2. 3. a. b. c. d. e. 4. 5. Name the following: A metallic hydroxide soluble in excess NH4OH Two colourless metal ions Two coloured metal ions A coloured metal oxide which dissolves in alkalis to yield colourless solution A colourless cation not a representative element A metal that evolves a gas which burns with a pop sound when boiled with alkali solutions Two bases which are not alkalis but dissolve in strong alkalis A yellow monoxide that dissolves in hot and concentrated caustic alkali A compound containing Zinc in the ion A amphoteric oxide of a metal with valency 3 that dissolves in hot, conc caustic alkali. Sam has two reagent bottles A and B. Bottle A contains NH 4OH solution and bottle B contains NaOH solution. How will Sam identify them by a chemical test. Distinguish the following as per instruction given: Calcium salt solution and Lead salt solution (using NaOH solution) Lead salt solution and Zinc salt solution (using Ammonium hydroxide solution) Copper salt solution and Ferrous salt solution (using NH4OH solution) Fe (II) salt solution and Fe (III) salt solution (using NaOH solution) Calcium salt solution and Magnesium salt solution (using NH4OH solution) a. Name the chloride of a metal which is soluble in excess Ammonium hydroxide solution. Write the equation for the same. b. Why the alkali is added drop by drop to the salt solution? Name the probable cation present based on the following observation a. White precipitate insoluble in NH4OH but soluble in NaOH b. Blue coloured solution

 

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Additional Info : ICSE Class X Prelims 2025 : Chemistry (Icse, Kolkata)  

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