Physics
Which of the following is not a property of heavy water ?

It produces corrosion
Freezing point of heavy water is higher than that of ordinary water
Boiling point of heavy water is lower than that or ordinary water
Density of heavy water is higher than that of ordinary water

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Physics
Which of the following occurred first ?

Max Planck unveiled the Quantum Theory
Guglielmo Marconi sent out the first wireless signals
Albert Einstein propounded the General Theory of Relativity
Wright Brothers successfully flew an aircraft

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