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Thorium
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Radium
Ordinary water
Which of the following is used as a preservative to protect processed food?
Which of the following laws is explained by the statement that matter can neither be created or destroyed ?
Which of the following layer of the earths atmosphere reflect back the radio waves to the earths surface
Which of the following Liquid contains Highest Rate of vaporization?
Which of the following metal does not undergo corrosion due to the formation of oxide layer -
Which of the following metal forms Amalgam with other metals?
Which of the following metal has least melting point?
Which of the following metal ion is needed to form poly-ribosomes from ribosomes?
Which of the following metal is extracted from sea water -
Which of the following metal is the heaviest in periodic table among the following