Chemistry - General Knowledge Questions and Answers

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

5x/36

7.2 x

x/6

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The major constituent of air is

carbon dioxide

nitrogen

oxygen

hydrogen

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The main chemical constituent of clay is

silicon oxide

aluminium borosilicate

zeolites

aluminium silicate

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The mineral containing both magnesium and calcium is

magnesite

calcite

carnallite

dolomite

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

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

1 gram of molecule

0.5 gram of molecule

5 gram of molecule

10 gram of molecule

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

Orissa coast

Travancore coast

West Bengal coast

Gujarat coast

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The main active constituent of tea and coffee is

nicotine

chlorophyll

caffeine

aspirin

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