Question

Write true (T) or false (F) against each statement:
1. Coke contains a higher proportion of carbon than coal.
2. Carbon monoxide is a poisonous pollutant.
3. Cement and glass are non-combustible materials.
4. Spontaneous combustion usually does not give external heat.
5. Oxygen is very effective in puting out fire.​

Answer 1

Answer:

1to 4 is true but I think 5 is false..

Explanation:

bcz carbon di oxide is very effective to putting out fire....

Answer 2

Explanation:

1. It’s true, 'coke' contains a "higher proportion" of 'carbon' than coal'.

2. It’s true, 'carbon monoxide' is a "poisonous pollutant."

3. It’s true, 'cement and glass' are "non-combustible materials."

4. It’s true, "spontaneous combustion" usually does 'not' give 'external heat'.

5. It’s false, 'Oxygen is 'not very 'effective in putting out the fire'. Carbon dioxide is more effective in putting out the fire. Tanks of oxygen are used in to enable breathing for patients.