Question

a) How does antacid works? [2] b) A white coloured powder is used by doctors for supporting fractured bones. i) Write chemical name and formula of the powder [1] ii) When this white powder is mixed with water, a hard solid mass is obtained. Write the balanced chemical equation for the change. [1] (c) A student detected the pH values of four unknown solutions A,B,C and D are 11,5,7 and 2 respectively. Predict the nature of the solution

Answer 1

A: Neutralises the effect of HCL which causes Hyper-Acidity.

B: CaSO4.1/2 .H2O Plaster of Paris.

C:  CaSO4.1/2 H2O+3/2 H2O GIVES CaSO4 .2H2O GYPSUM

D:A is BASIC

   B is ACIDIC

  C is NEUTRAL

   D is Highly ACIDIC

PLZ MARK IT AS BRAINIEST