Global MCQ Practice

šŸŒ Total MCQ
šŸ  Homepage šŸ“˜ Download PDF Books šŸ“• Premium PDF Books

Class 8 Science Chapter 6 Combustion And Flame Quiz 7 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. The burning of LPG is an example of
2. Which of the following fuel gases has the highest calorific value?
3. What are the 3 types of combustion?
4. Of the following inflammable substance is
5. The outermost zone of a candle flame is the:
6. What is the unit for expressing the calorific value of a fuel?
7. LPG is not used as
8. Water is used to extinguish fire because it
9. Charcoal burns in air producing
10. How much is the minimum temperature that begins to burn the material on fire?
11. The least hot zone of a candle flame is
12. Name the most common fuel used in homes.
13. Which of the following is not a by-product fuel?
14. Incomplete combustion gives out .....
15. The hottest part of a candle flame is:
16. The substance which vaporizes during burning gives .....
17. A combustible substance maybe solid, liquid or gas.
18. Cutting off trees at large scale leads to
19. The substances like kerosene, oil and molten wax which vaporize during burning forms flames whereas charcoal does not vaporize, do does not produce flames.
20. A lot of dry powder of one of the chemicals can be released over a fire to extinguish it. This chemical is:
21. True or false:The burning of white phosphorus is a rapid combustion
22. Out of these which has lower ignition temperature
23. Oxides of sulphur and dissolve in rainwater and form acid rains.
24. Which fuels are used for running automobiles?
25. Write the chemical process that takes place in soda-acid fire extinguisher ..... (type the formula)
šŸ  Back to Homepage šŸ“˜ Download PDF Books šŸ“• Premium PDF Books