Petroleum is a non-renewable source of energy because it<...
Petroleum is a non-renewable source of energy because it
is formed naturally
is cheap
can be recycled after use
cannot be regenerated once used up
Correct answer is D
No explanation has been provided for this answer.
The IUPAC nomenclature for the compound above is ...
A mixture of common salt, ammonium chloride and barium sulphate can best be separated by ...
Which of the following dilute solutions has the lowest pH value? ...
A calcium atom and a calcium ion have the same ...
Which of the following questions is correct about the periodic table? ...