Chemistry Past Questions and Answers

The active reducing agent in the blast furnace for the extraction of iron is?

The fraction of crude oil used as jet fuel is?

It is not desirable to use lead tetraethyl as an anti-knock agent because?

Al<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3(s)</sub> + 3H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4(aq)</sub> → Al<sub style='font-size: smaller;'>2</sub>(SO<sub style='font-size: smaller;'>4(aq)</sub>) + 3H<sub style='font-size: smaller;'>2(I)</sub>O<br/>Al<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3(s)</sub> + 2NaOH<sub style='font-size: smaller;'>(aq)</sub>) + 3H<sub style='font-size: smaller;'>2(I)</sub>O → 2NaAl(OH)<sub style='font-size: smaller;'>4(aq)</sub>).<br/>We can conclude from the equations above that Al<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3(s)</sub> is?

The carbon atoms on ethane are?