Sodium metal should be stored in
1). Alcohol
2). Kerosene oil?
3). Water
4). Hydrochloric acid
1. Vulcanization of rubber is carried out by adding
2. Name two elements that find wide application in transistor industry
5. Which of the following has least negative electron gain enthalpy?
6. What are the main components of Brass Alloy?
10. Which of the following pollutants is main product of automobile exhaust ?