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8. The Periodic Table
A section of Chemistry, 0620
Listing 10 of 592 questions
The table shows some properties of the Group I metals. boiling point /ºC melting point /ºC density in g/cm3 metal 0.53 lithium sodium 0.86 potassium 1.53 rubidium caesium Describe the trend in boiling points of the Group I metals. Predict the density of caesium. Deduce the state of caesium at 20ºC. Explain your answer. Complete the word equation for the reaction of rubidium with water. rubidium + water → + 1 11 The dye, indigotin, is formed when compound F is exposed to air. The structure of compound F is shown below. C N C C C C C C C H O– Na+ H H H H H Complete the table and calculate the relative molecular mass of compound F. atomic mass number of atoms type of atom carbon hydrogen nitrogen oxygen sodium relative molecular mass = [ 1 11 Three dye mixtures, J, K and L, were spotted onto a piece of chromatography paper. Three pure dyes, X, Y and Z, were also spotted onto the same piece of paper. The diagram shows the results of this chromatography. J K L X Y Z Suggest why the base line was drawn in pencil and not in ink. Which dye mixture, J, K or L, contains a dye which did not move during this chromatography? Which dye mixture, J, K or L, contains both dye X and dye Y? Which dye mixture, J, K or L, does not contain dye Z? 1 11
0620_s16_qp_31
THEORY
2016
Paper 3, Variant 1
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Questions Discovered
592