The metal that is used as a catalyst in the hydrogenation of oils is

The metal that is used as a catalyst in the hydrogenation of oils is

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1) The molecule which has the highest percentage of ionic character among the following is

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

3) The luster of a metal is due to

4) The most abundant rare gas in the atmosphere is

5) The number of d-electrons in Fe₂+ (Z = 26) is not equal to that of