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Periodic Table: O Level Chemistry Questions and Answers PDF Download eBook
MCQ: First element in periodic table to have 8 valence electrons is
- nitrogen
- oxygen
- fluorine
- neon
D
MCQ: Soda water (H2CO3(aq)) has a pH of
- 1
- 2
- 3
- 4
D
MCQ: Consider the equation Al2O3 + NaOH + H2O →NaAl(OH)4. Balancing of the equation requires how many moles of NaOH?
- 1
- 2
- 3
- 4
B
MCQ: Chromatography is especially useful for
- foods only
- drugs only
- salt solutions
- food and drugs
D
MCQ: While plotting decrease in mass against time, a flat curve shows
- fastest reaction
- reaction is slower
- that the reaction is over
- that the reaction is endless
C