The most electronegative element among the following is

The most electronegative element among the following is

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1) The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

2) The hottest part of the gas flame is known as

3) The most extensive, commercially useful source of thorium as monazite sand occurs in India at

4) The heat required to raise the temperature of body by 1 K is called

5) The gas used in the manufacture of vanaspati from vegetable oil is