I. Fill in the blanks :
1.Addition of hydrogen in a substance in a reaction is known as___________ reaction. 2.In a ________ reaction two or more substances combine to form a new single substance. 3.Unbalanced reactions are also known as _________ 4.Reactions in which heat is given out along with the products are called _________- reactions. 5.Reactions in which energy is absorbed are known as _________ reactions. 6.When as element displaces another element from its compound, a ________ reaction occurs. 7.Those reactions, in which two compounds react by an exchange of ions to form two new compounds, are called ________ reactions 8.Precipitation reactions produce __________ salts. 9.Reduction is the _________ of oxygen or gain of hydrogen. 10.The digestion of food in the body is an example of ____________ reaction. 11.The addition of oxygen to a substance is called __________. 12.When calcium carbonate is heated, it decomposes to give___________ and _________.
Copyright © 2021 Aakash EduTech Pvt. Ltd. All rights reserved.