CLASS 10TH SCIENCE CHAPTER 3 chemistry all chapter wise question
CLASS 10 TH SCIENCE CHAPTER 3 In-text questions set 1 Page number 40 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? Solution: (i) Mercury is the metal which is liquid at room temperature (ii) Sodium and potassium are the metals which can be cut with a knife (iii) Silver is the best conductor of heat (iv) Mercury is poor conductor of heat. 2. Explain the meanings of malleable and ductile. Solution: 1. Metals which can be beaten to sheets are said to be malleable 2. Metals which can be drawn into thin wires are said to be ductile In-text questions set 2 Page number 46 1. Why is sodium kept immersed in kerosene oil? Solution: Sodium is a reactive metals, if kept open it will react with oxygen to explore and catch fire. Sodium metal is kept immersed in kerosene to p...