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Chemistry

Chemistry
The metal present in vitamin B12 is

Co
Fe
Mg
Mo

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Chemistry
Spirit in contact with body gives cool sensation because it is :

Liquid
A good conductor
Highly volatile
Transparent

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Chemistry
Which of the following is used in welding broken pieces of iron rails and machine parts?

Aluminium powder
None of these
Solder
Aluminium sulphate

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Chemistry
Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives

Copper at anode and oxygen at cathode.
Copper at cathode and anodes dissolve to give copper
Copper at cathode and oxygen at anode
Hydrogen at cathode and oxygen at anode

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Chemistry
Which one of the following is a greenhouse gas ?

Helium
Sulphur dioxide
Carbon dioxide
Nitrogen

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Chemistry
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is

All of these
CO
CO2
O3

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MORE MCQ ON Chemistry

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