Page 40 Question 1. Give an example of a metal which (i) is a liquid at room temperature. (ii) can be easily cut with a knife. (iii) is the best conductor of heat. (iv) is a poor conductor of heat. Answer 1 (i) Metal that exists in liquid state at room temperature → Mercury. (ii) Metal that can be easily cut with a knife → Sodium, Potassium. (iii) Metal that is … [Read more...] about Chapter 3 Metals and Non Metals
Class 10
Chapter 2 Acids, Bases and Salts
NCERT Solutions for Chapter 1 Chemical Reactions and Equations from Class 10 Page 18 Question 1. You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube? Answer 1 Let us … [Read more...] about Chapter 2 Acids, Bases and Salts
Chapter 1 Chemical Reactions and Equations
NCERT Solutions for Chapter 1 Chemical Reactions and Equations from Class 10 Page 6 Question 1 Why should a magnesium ribbon be cleaned before burning in air? Answer: Magnesium is a very reactive metal like Na , Ca etc. When magnesium is exposed to air, it reacts with oxygen to form a layer of magnesium oxide. 2Mg + O2 ------->2 MgO This layer of magnesium oxide … [Read more...] about Chapter 1 Chemical Reactions and Equations