Frame any two questions from your dialy life and write scientific reasons behind it
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.Which one of the following waves are used by the common TV remote control?
A.Radio waves
B.Lasers
C.Infrared waves
D.Ultrasonic waves
Ans. C Which gas is safe and an effective extinguisher for all confined fires?
A.Nitrogen dioxide
B.Carbon dioxide
C.Sulphur dioxide
D.Nitrous Oxide
Ans. B
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