Q1
Acids turn blue litmus paper:
Ared
Bblue
Cgreen
Dcolourless
CBSEClass 10 (CBSE)ScienceCh 2 · Topic 1
Properties of Acids and Bases
Learning the chemical properties that distinguish acids from bases.
Core concept
Acids react with metals like zinc or magnesium to produce hydrogen gas and a salt (e.g., Zn + 2HCl → ZnCl₂ + H₂), which can be tested using a burning splint that produces a characteristic 'pop' sound. Acids and bases both react with metal carbonates to release carbon dioxide gas, which turns limewater milky — a test used to confirm the presence of CO₂. The strength of an acid or base is measured by how completely it ionises (splits into ions) in water — strong acids like HCl ionise almost completely, while weak acids like acetic acid ionise only partially.
Exam highlight
Key diagram
Keywords worth remembering
Trending
properties of acids and basescbse class 10
Most searched
CBSE class 10 properties of acids and bases
Quick revision
Study resources
Notes & downloads
Quick notes
• Acids release H⁺ ions in water; turn blue litmus red; react with metals to release H₂ gas.
• Bases release OH⁻ ions in water; turn red litmus blue; feel soapy.
• The hydrogen gas test uses a burning splint, producing a 'pop' sound.
• Strong acids/bases ionise almost completely in water; weak ones ionise only partially.