Acids, Bases & Salts - General Science TNPSC Online Test

Dear TNPSC Aspirants, practice most things to get very good at them, more mock test you attend, get a better idea of the questions you might encounter on test day. so we people in sigaramthodu prepared a free online mock test for tnpsc group 2/2A and group 4 syllabus. In this mock test we covered general science - Chemistry Acids, Bases and Salts topic you can attend this test in english as well as tamil.

Learning Objectives of ACIDS, BASES AND SALTS

• know about formation, properties and uses of acids, bases and salts.
• know the importance of acids, bases and salts in daily life.
• understand how to identify the nature of a solution by using indicators and pH paper.
• know the strength of acid or base solutions.
• define pH scale and explain the significance of pH in everyday life.
• know aquaregia and its properties

Important Points ACIDS, BASES AND SALTS

• Acid is a substance which furnishes H+ ions or H3O+ ions when dissolved in water.
• Base is a substance which releases OH- ionswhen dissolved in water.
• Salt is the product of reaction between acidsand bases.
• Acids and bases neutralize each other to formcorresponding salts and water.
• Salts have various uses in everyday life.
• Acidic and basic solutions in water conduct electricity because they produce hydrogen and hydroxide ions respectively.
• When an acid reacts with a metal, hydrogen gas is evolved and a corresponding salt is formed.
• Phenolphthalein and Methyl orange are used as indicators to find out whether the given solution is acid or base.
• Litmus paper is also used to find out whether the given solution is acid or base.
• pH paper is find out the given solution whether acidic or basic in nature.
• Aquaregia is a mixture of hydrochloric acid and nitric acid optimally in a molar ratio of 3:1
• pH Scale is used to find out the power of hydrogen ion concentration in a solution.