Q1. Ramesh, an 11-year-old boy, developed a few pimples on his face. His mother told him that this is because […]

Q1. Which of the following statements are the characteristics of a physical change? (i) The state of the substance may

Q1: Which metal is commonly used to make food packaging materials as it is cheaper, and its thin sheets can

Q1. Choose the incorrect statement. (i) A switch is the source of electric current in a circuit.Ans: Incorrect. A switch does

Q1. A solution turns the red litmus paper to blue. Excess addition of which of the following solution would reverse