Question

2. Copper is....... reactive than iron.
3...... is used in table salt to prevent goitre.
4. Metals generally this place hydrogen gas when reacts with dilute.....
5. The minimum temperature at which any substance catches fire and star
B. State whether the following statements are true or false. 5 marks.
1. We can boil water taken in ordinary paper cup without burning paper.
2. Oxygen does not play any role in combustion of any substance.
3. Burning of white phosphorus is an example of spontaneous combustion.
4. Liquefied Petroleum gas is an example of inflammable substance.​

Answer 1

Answer:

2)less

3)iodine

4)sulphate

5) ignition temperature

B1)F

2)F

3)T

4)T