A pellet of a basic substance absorbs moisture from the air gives a soapy touch. The substance is also procduced during chlor-alkali process.
(i) Identify the substance .
(ii) What happens when the substance is treated with ` CO_(2)` ? ,
(iii) Write the balanced chemical equation for the reaction of the substance with ` CO_(2)`

A dry pellet of a common base B, when kept in open absorbs moisture and turns sticky. The compound is also a by product of chloralkali process. Identify B, what type of reaction occurs when B is treated with an acidic oxide? Write a balanced chemical equation for one such solution

What happens when : (i) Red phosphorus is treated with l_(2) and water. (ii) Give balance equation : Cu reacts with HNO_(3) to produce NO and NO_(2) in the ration 2:1 .

When the solution of substance X is added to a solution of potassium iodide, then a 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 balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactants and products involved in the chemical equation.

What is an oxidation reaction (i) the substance oxidised and (ii) the substance reduced: ZnO+ C to Zn + CO

A brown substance 'X' on heating in air forms a substance 'Y'. When hydrogen gas is passed over heated 'Y', it again changes back into 'X'. (i) Name the substances X and Y. (ii) Name the chemical processes occurring during both the changes. (iii) Write the chemical equations.