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CTET 2 Math and Science Jul 2013 Paper

Question : 69

Total: 120

Colourless and odourless gas which extinguishes a burning match stick.
Colourless and odourless gas which promotes burning of a candle.
Brown coloured pungent smelling gas.
Colourless and odourless gas which produces a 'pop' sound when a burning match stick is brought near it.

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