DP Chemistry Questionbank

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• 18M.3.hl.TZ2.18b.ii: Outline why complex B absorbs light of longer wavelength than complex A.
• 18M.3.hl.TZ2.18b.i: State the feature of the molecules responsible for the absorption of light.
• 18M.3.hl.TZ2.18a: Draw the Lewis (electron dot) structure for an appropriate doping element in the box in the...
• 18M.3.hl.TZ1.15c: The structure of two dyes used in DSSCs are shown. Predict, giving a reason, which dye will...
• 18M.3.hl.TZ1.15b: Dye-sensitized solar cells, DSSCs, use a dye to absorb the sunlight. State two advantages that...
• 18M.3.hl.TZ1.15a: Early photovoltaic cells were based on silicon containing traces of other elements. State the...
• 17N.3.hl.TZ0.19b: The natural absorption of light by chlorophyll has been copied by those developing dye-sensitized...
• 17M.3.hl.TZ2.19b: Suggest one advantage a DSSC has over a silicon based photovoltaic cell.
• 17M.3.hl.TZ2.19a: Contrast how absorption of photons and charge separation occur in each device.
• 17M.3.hl.TZ2.18a.ii: The structures of 11-cis-retinal and β-carotene are given in section 35 of the data booklet....
• 17M.3.hl.TZ1.19b: Both photosynthesis and the Grätzel cell use energy from sunlight to bring about reduction....
• 17M.3.hl.TZ1.19a: Identify two ways in which the structure of the dye shown resembles the chlorophyll molecule. Use...
• 16N.3.hl.TZ0.21c: Dye-sensitized solar cells (DSSC) convert solar energy into electrical energy. (i) Describe how...
• 16M.3.hl.TZ0.21b: In dye-sensitized solar cells (DSSCs), nanoparticles coated with a black dye are trapped between...
• 16M.3.hl.TZ0.21a: State how n-type and p-type doping of silicon is achieved and the nature of electric charge...
• 14M.3.hl.TZ2.4a: Explain which of the two structures would be coloured.
• 14M.3.hl.TZ2.4b: In terms of the wavelength of the visible light absorbed, suggest why the coloured form is blue.
• 14N.3.hl.TZ0.11: The photovoltaic cell is a valuable source of energy. Describe its construction and how it...
• 13N.3.hl.TZ0.13c: Pure silicon is a semiconductor but its conductivity can be increased when it is doped with small...
• 12N.3.hl.TZ0.A5c: One of the following organic compounds is colourless while the other is orange. Predict, with...
• 10M.3.hl.TZ2.A5: \(\beta \)-carotene is involved in the formation of vitamin A. Its sources include carrots,...
• 09M.3.hl.TZ1.C3c: Describe the use of silicon in photovoltaic cells. Include the following in your description: •...
• 11M.3.hl.TZ1.C5: Describe how silicon may be converted into a p-type semiconductor and explain why this leads to...
• 12M.3.hl.TZ2.A4b: Phenolphthalein indicator is colourless in solutions with a pH less than 8.2 but pink in...