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The ten questions

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1. 1Science › ChemistryMediumWhich fraction is drawn from the very bottom of an oil fractionating column?Wrong3.2s0
2. 2Science › ChemistryMediumAdding silver nitrate gives a white precipitate, showing which ion is present?Right4.2s+97
3. 3Science › ChemistryMediumHard water is caused by dissolved calcium ions and ions of which other metal?Right4.6s+96
4. 4Science › ChemistryVery hardAmedeo Avogadro's contemporary Stanislao Cannizzaro is credited with clarifying what?Right3.4s+98
5. 5Science › ChemistryEasyWhat is H2O more commonly known as?Right1.3s+100
6. 6Science › ChemistryExpertFehling's solution is used to test for what?Wrong2.3s0
7. 7Science › ChemistryHardHow many electrons can a d subshell hold in total?Right1.9s+100
8. 8Science › ChemistryHardWhich principle says electrons fill the lowest available energy orbitals first?Right3.0s+98
9. 9Science › ChemistryHardWhich rule says many atoms bond so as to end up with eight outer electrons?Right3.9s+97
10. 10Science › ChemistryEasyWhen sugar dissolves in water, what is the sugar called?Right4.1s+97