Name the gas used in:
(a) weather balloons
(b) traffic lights
(c) electric bulbs
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(a) Helium
(b) Neon
(c) Argon
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Which component of air controls the climatic conditions?
Name two important processes supported by oxygen present in air.
State the full forms of LPG and CNG.
Define the following:
(a) Respiration
(b) Photosynthesis
(c) Combustion.