General Knowledge-Question Answer(Set-16)
Stuff Reporter | 19-02-12

Q. The hydronium ion is

? H3O+

Q. The most electropositive elements among the following is

? Cs

Q. The gas used for artificial ripening of green fruit is

? Ethylene

Q. Zone refining is used for the purification of

? Ge

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

? HF

Q. The iron ore magnetite consists of

? Fe2O3

Q. The major constituent of air is

? Nitrogen

Q. The main chemical constituent of clay is

? Aluminium silicate

Q. The mineral containing both magnesium and calcium is

? Dolomite

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

? Ag

Q. The main active constituent of tea and coffee is

? Caffeine

Q. The maximum number of isomers for an alkene with molecular formula C4H8 is

? 4

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