Chem unit 1 pastpap5
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Which of the following does not have exactly 10 electrons? | show 🗑
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| Comment on the fact that there is close agreement between the values for sodium chloride, NaCl. | show 🗑
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| Classify the type and mechanism of the reaction that occurs when myrcene reacts with bromine, Br2. | show 🗑
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| show | From: Red / brown / orange / yellow or combinations of these colour. To: colourless.
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| show | Easier to transport / easier to store/ less space / less volume needed
for storage / easier to handle / easier to transfer.
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| show | It is a mixture of liquefied C3 and C4 alkanes.
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| Which of the following statements correctly describes an environmental problem caused by the burning of hydrocarbon fuels? | show 🗑
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| show | AgI has (a degree of) covalent character (1) due to polarization or distortion (of the anion)
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| Suggest why the first ionization energies of the Group 1 elements decrease down the group. | show 🗑
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| Suggest why the first ionization energies of the Group 1 elements decrease down the group. à | show 🗑
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| show | Si : covalent bonds / many bonds/strong bonds (between atoms) (1) S : weak forces /van der Waals’ forces/London forces/dispersion forces/intermolecular forces/induced-dipole forces (1) (need to be overcome).
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| show | Cations/ions decrease in size (from
Na+ to Al3+) OR charge increases/charge density on (cat)ions increases/ “effective nuclear charge” increases (from Na+to Al3+) (1) more e– (per atom in ‘sea’ of delocalized electrons) / more delocalized electrons
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| Explain why the melting temperature increases from sodium to aluminium.--> | show 🗑
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| show | Add MgO to acid/react MgO with acid/dissolve MgO in acid/ Filter.
Heat/boil filtrate /MgSO4 solution (until volume reduced by half).
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| show | Leave to cool/leave to crystallise/evaporate slowly/leave to evaporate./(decant / filter / pick out crystals,then) Leave to dry/pat dry/dry between filter papers/put in an oven/put in a desiccator/dry the crystals.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
ufuoma