tell the all chemical reactions science class 8 chapter 4 and explanation also
Answers
Explanation:
Question 6: How many elements react to form new compounds in an addition reaction?
One only
Two only
Two or more
None
Answer: c) Two or more
Question 7: What is a reduction reaction?
When oxygen combines with a substance
When oxygen reduces from a substance
When hydrogen reduces from a substance
None of the above
Answer: b) When oxygen reduces from a substance
Question 8: What are the substances which react together called?
Mixtures
Reactants
Combinations
None of the above
Answer: b) Reactants
Question 9: Substances formed through a chemical reaction are known as _____________.
Molecules
Bonds
Compounds
Products
Answer: d) Products
Question 10: When fuels such as diesel, petrol, etc. burn, they react with _____________ to form CO2 gas.
Acid
Air
Water
G 4 Chemical