Chemical Reactions and Equations Previous Years Questions Select the appropriate state symbols of the products given as X and Y in the following chemical equation by choosing the correct option from table given below:Zn(s) + H2SO4(l) → ZnSO4(X) + H2(Y)a. X is (s) and Y is (l) b. X is (aq) and Y is (g)c. […]
Chemical Reactions and Equations Important Questions What is a balanced chemical equation? Why is it important to balance a chemical equation? Define exothermic reaction. Why respiration is considered as exothermic reaction? A solution of substance ‘X’ is used for whitewashing.i. Name the substance ‘X’ & write its formula.ii. Write the reaction of ’X’ with water. […]
Chemical Reactions and Equations – Notes Chemical Reaction:- The change in which one or more new substances with different chemical properties are formed is called a chemical reaction. Common observations during a chemical reaction are:- Change in state Change in color Change in temperature Evolution of gas Word Equation:- A chemical reaction expressed in words rather than […]
Chemical Reactions and Equations Previous Years Questions : Solutions Strong heating of ferrous sulphate leads to the formation of a brown solid and two gases. This reaction can be categorised as:-a. displacement and redoxb. decomposition and redoxc. displacement and endothermicd. decomposition and exothermic [1 mark] [CBSE 2020]Sol:(b) decomposition and redox. What is observed after about 1 hour of adding the […]