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The hydronium ion is

H+
HO -
H2+
H3O+
Additional Questions

The most electropositive elements among the following is

Answer

The method that cannot be used for removing permanent hardness of water is

Answer

The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

Answer

The gas used for artificial ripening of green fruit is

Answer

Zone refining is used for the purification of

Answer

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
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