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ICSE Acids Bases and Salts Class 10 Important Questions 1. Define acid. Ans. An acid is a compound which when dissolved in water yields H+ as the only positively charged ion producing H3O+ ions. The presence of H+ is responsible for the characteristic properties of the acid Ex : Hydrochloric acid (HCl) gives H+(aq) and Cl–(aq) ions, sulphuric acid (H2SO4) gives 2H+(aq) and SO42–(aq) ions and nitric acid (HNO3) gives H+(aq) and NO3–(aq) ions. 2. With respect to the theory of ionization, define an acid. Ans. An acid is a compound which when dissolved in water yields H+ as the only positively charged ion. The presence of H+ is responsible for the characteristic properties of the acid. An acid when put in water dissociates as follows: HCl → H+ + Cl– The proton formed then combines with water molecule to form a hydronium ion (H3O+)
3. Mention the different ways by which acids are classified?