The splinter bursting into a flame indicates that the tube contains:
Hydrogen
Carbon Dioxide
Oxygen
Both B & C
Oxygen is produced as a result of photosynthesis. This oxygen when liberated catches fire.
What happens when :
(a) A lit splinter is introduced into a jar containing carbon dioxide?
(b) Moist blue litmus paper is placed in a jar containing carbon dioxide?
(c) Carbon dioxide is passed through lime water first in small amounts and the excess?
(d) A baking mixture containing baking powder is heated?
(e) A soda water bottle is opened?
Manisha took some vinegar in a test tube and added some baking powder to it . Then she lit a matchstick and brought it near the mouth of the test tube . The flame of the matchstick got extinguished.
Which of the following is correct conclusion regarding the given experiment .
(A) Carbon dioxide gas does not support burning .
(B) Air contains carbon dioxide .
(C) Oxygen gas present in the air is necessary for burning .
(D) Oxygen gas can extinguish fire .
Question 11 When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of (a) oxygen (b) carbon dioxide (c) nitrogen (d) water vapour