6. Combustion and Flame – Class 8 Science Chapter 6 NCERT Important Questions and Answers for CBSE

Marks-Wise Important Questions and Answers for Class 8 Science Chapter 6 : Combustion and Flame (CBSE)

Chapter 6: Combustion and Flame

1.A substance which reacts with oxygen giving heat is called a combustible substance. Which, one of the following is a combustible substance?
(a)iron nail (b)glass  (c)stone piece
(d)wood
2.Which one of the following has the highest calorific value?
(a)kerosene  (b)biogas     (c)LPG
(d)petrol
3.Magnesium ribbon on burning in air produces
(a)magnesium oxide, water and light
(b)magnesium oxide and heat
(c)magnesium oxide, heat and light
(d)magnesium oxide, water and heat
4.Which of the following is not a combustible substance?
(a)camphor   (b)glass                      (c)straw
(d)alcohol
5.The substance that does not burn with flame is
(a)LPG              
(b)camphor    (c)dry grass    (d)charcoal

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Posted 3 months ago