Which type of fire extinguisher is used for petroleum fire?
A). Powder type
B). Liquid type
C). Soda acid type
D). Foam type
2. Indicate correct statement for man?
3. The element used in the manufacture of safety matches is
4. Which combination of colour is the most convenient during day and night time ?
5. Which of the following is the correct sequence in food chain?
6. 435: Conduction band electrons have more mobility than holes because they
7. The metal chiefly used for galvanising iron is
8. Metal are good conductors because
9. Which of the following parts of the nephron is least permeable to water?