O Level Chemistry MCQs - Complete
Periodic Table: O Level Chemistry Multiple Choice Questions PDF p. 62
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Periodic Table: O Level Chemistry Questions and Answers
1.
First element in periodic table to have 8 valence electrons is
2.
Soda water (H2CO3(aq)) has a pH of
3.
Consider the equation Al2O3 + NaOH + H2O →NaAl(OH)4. Balancing of the equation requires how many moles of NaOH?
4.
Chromatography is especially useful for
5.
While plotting decrease in mass against time, a flat curve shows