A compound from gypsum hardens with water: name, preparation, uses
The same question, asked 3 times: 2023*, 2024*, 2026. Every wording below, oldest first.
Try each one first, then open its answer.
Question 1
2023
21 (a)(i) A compound ‘X’ which is prepared from gypsum has the property of hardening when mixed with proper quantity of water. Identify ‘X’ and write its chemical formula. (ii) State the difference in chemical composition between baking soda and baking powder.Question 2
2024
32A compound which is prepared from gypsum has the property of hardening when water is mixed in right quantity with it : (i) Write common name and the chemical name of this compound. (ii) Give chemical equation for its preparation. (iii) List its two uses.Question 3
2026
27 (A)(a) Give the chemical name and formula of Plaster of Paris. (b) Write the chemical equation of its preparation. (c) Give any two uses of it.