CBSE- Combustion and Flame-Test

1.  What is the full form of CNG? (1)

2.  Do all the fuels burn with flame? (1)

3.  What are fuels? (2)

4.  What are combustible substances? (1)

5.  What are the conditions for combustion? (3)

6.  What is meant by forest fire? (2)

7.  Why does a matchstick not burn of its own? (2)

8.  Describe the history of matchstick? (3)

9.  Define combustion? Explain various types of combustion? (4)

10.  Can the process of rusting be called combustion? Explain. (1)