Muft Shiksha
Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects

Science

Acids, Bases, and Salts

अम्ल, क्षारक और लवण

In Class 10 Science, under the chapter Chemical Substances – Nature and Behaviour, students study acids, bases, and salts through their properties, reactions, and everyday examples. The topic explains how these substances behave with indicators and with one another, including neutralisation, and introduces the formation and practical importance of common salts.

Practice questions

When a base is added to an acidic solution, universal indicator changes from red to green. What happened?When acid is added to a basic solution, universal indicator changes from blue to green. What is the conclusion?Why does pH increase when hydroxide ions are added to an acidic solution?Equal volumes of acid and base were mixed but the solution remained acidic. What is the most suitable reason?Equal volumes of acid and base were mixed but the solution remained basic. What is the most suitable reason?An insoluble substance forms salt and water with acid. Why will it not be called an alkali?Metal oxides form salt and water with acids. Which nature does this prove?Non-metal oxides can form salts with bases. Which nature does this show?Why is a coloured solution formed in the reaction of copper oxide with dilute acid?How does washing soda act in softening hard water?Why is it scientifically wrong to judge an unknown solution as acid or base only by its colour?Why is identifying acids and bases by taste prohibited in the laboratory?In a solution, pH paper becomes deep red and blue litmus turns red. What is the safest conclusion?What is the correct order of nutrition in humans?A base turns red litmus paper into which colour?A solution with pH greater than 7 is generally what?A solution with pH less than 7 is generally what?A solution with pH less than 7 is what type of solution?A solution with pH value 7 is considered what?Acids turn blue litmus paper into which colour?