1.

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 .

Answer»

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 .



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