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

What is the major risk of storing sodium hydroxide in an acid bottle?If soil has very low pH and too much lime is added, what problem may occur?What is the main process behind the decrease in pH during tooth decay?Which statement correctly relates acid rain and carbonate rocks?A sample turns red litmus blue but does not give carbon dioxide when acid is added. What could it be?What can happen to setting if too much water is used while making a plaster of Paris statue?Why would it be wrong to call a solution with pH 8 neutral?Why can relief methods for an ant sting and a scorpion sting be different?If a student first takes acid in a beaker and then adds water while diluting acid, what is the main mistake?The gas from an acid-metal reaction is collected in soap bubbles and burns with a pop sound. What does this confirm?What will be the nature of sodium carbonate formed by heating baking soda?On heating a sample, water droplets appear and its colour changes. This may identify what kind of salt?Why is there a risk of harmful substances forming when lemon juice is stored in a copper vessel?Blue litmus turns red in a solution, and bubbles form when chalk powder is added to it. What is the correct conclusion?Which substance can absorb an acidic gas and form a salt?A solution shows pH 11, but after adding much water its pH becomes 9. What does this correctly mean?If a salt is formed from a strong base and a weak acid, what effect will its aqueous solution generally show on red litmus?Why does pH increase when hydroxide ions are added to an acidic solution?Why does an aqueous solution of sodium chloride conduct electricity even though it may be neutral?Under which condition can carbon dioxide remove the milkiness of lime water?