Phosphorus is kept in water because
1). its ignition temperature is very high
2). its ignition temperature is very low
3). its critical temperature is high
4). its critical temperature is low
1. When a spoon is to be electroplated with nickel the spoon is
2. Which of the following molecules has a bond order of 2.5?
3. The wire of flash bulbs is made up of
5. Which of the following is used to remove rust stains on cloth?
6. Of the following which one pollutes the air of abig city
7. The gas that causes suffocation and death when coal or coke is burnt in a closed room is
8. Type metal used in printing press is an alloy of