7. How can you show that hydrogen is-:
a. lighter than air?
b. non supporter of combustion?
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Answer:
non supporter of combustion
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Take a delivery tube and place one of its ends in a soap solution kept in a trough and the other one in a flat bottom jar as shown in the figure. The soap bubbles containing hydrogen rise upward the air. The rising soap bubbles prove that hydrogen is (lighter than air)
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