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Zone refining is used for the purification of

Au
Ge
Ag
Cu
Additional Questions

The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

Answer

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

Answer

The high reactivity of fluorine is due to

Answer

The iron ore magnetite consists of

Answer

The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

Answer

The major constituent of air is

Answer

The main chemical constituent of clay is

Answer

The mineral containing both magnesium and calcium is

Answer

The metal does not give H2 on treatment with dilute HCL is

Answer

The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

Answer
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