When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.
(a) What do you think substance X is likely to be ?
(b) Name the substance which the yellow solid consists of.
(c) Which characteristic of chemical reactions is illustrated by this example ? (d) Write a balance chemical equation for the reaction which takes place. Mention the physical states of all the reactants adn products involved in the chemical equatio.
Which of the following are correct with respect to chemical reactions? (i) Chemical compositon changes (ii) Formation of new products takes place (iii) We can’t obtain the intial reactants by simple physical means like filtering, dissolving etc.