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Q. The rusting of iron is a/an
The rusting of iron is a/an electrochemical change.
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Q. Cloudy nights are warmer compared nights, as clouds mainly
Q. Which of the following produced by the solar energy transformation by using photovoltaic cell?
Q. Glycol is added to aviation gasoline as it
Q. Which among the given chemicals is responsible for depletion of ozone layer in the atmosphere -
Q. The scientist who first discovered that the earth revolves round the sun was
Q. The blue colour of water in the sea is due to
Q. When we speak we produce sound. This is because our vocal cords
Q. Chemical name of bleaching powder is:
Q. A vacuum cleaner works on the principle of pressure difference. On the moon it will
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