CBSE Class 10th Solutions Maths, Science

Mathematics CBSE Class X Notes & Solutions Click on the links to read Notes & Solutions Maths Chapter 2 Polynomials Maths Chapter 3 Linear Equation Maths Chapter 4 Quadratic Equations Maths Chapter 5 Arithmetic Progression Maths Chapter 6 Triangles   Maths Chapter 7 Coordinate Geometry Maths Chapter 9 Applications of Trigonometry Maths Chapter 10 Circles Maths Chapter 11 Constructions Maths Chapter 12 Areas related to Circles Maths Chapter 13 Surface Area & Volumes Maths Chapter 14 Statistics Maths Chapter 15 Probability Science (Physics/Chemistry/Biology)  Science Chapter 1 Chemical reactions Science Chapter 2 Acid Base Salts Part 1 Science Chapter 2 Acid Base Salts Part 2 Science Chapter 2 Acid Base Salts Part 3 Science Chapter 3 Metals & Non Metals Science Chapter 4 Carbon & Its Compounds Science Chapter 5 Periodic Classification of Elements Science Chapter 6 Life Processes Science Chapter 7 Control & Co ordination Science Chapter 8 Reproduction Scie...

Questions 1. Why should curd and sour substances not be kept in brass and copper vessels? Ans: Curd & Sour substances are acidic in nature, it will react with brass & copper these acidic substances combine with metal. This reaction turns food to poison which damage people’s health. 2. Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?  Ans: When an acid reacts with any metal, salt and hydrogen gas are formed. Metal + Acid  →  Salt + Hydrogen gas 3. Metal compound A reacts with dilute hydrochloric acid to produce effervescence(bubbles in liquid). The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. Ans: As metal compound released is Calcium Chloride the gas evolved here is CO2. Hence metal A should be Calcium Carbonate. Hence the...