5.Which treatment is frequently used to protect aluminium articles from subsequent erosion?A. Making aluminium the anode during electrolysis.B. Dipping the aluminium in hot aqueous sodium hydroxide.C. Dipping the aluminium in molten cryolite.D. Coating the aluminium with a less reactive metal.Which of the following is not a use of silicones?A. Waterproofing.B. Lubricants.C. Computer chips.D. Implants.7.Which of the following statements, comparing the physical properties of calcium andnickel is correct?(i)The melting point of calcium is lower than that of nickel.(ii)Calcium has a much higher density than nickel.(iii)Calcium does not behave as a catalyst whereas nickel does.A. (i), (ii) and (iii) are correct.B. (ii) and (iii) are correct.C. (iii) is correct.D. (i) and (iii) are correct.8.Two allotropic forms of sulphur are rhombic and monoclinic. Which of the statementsbelow is not true?A. They both dissolve in nonpolar solvents such as benzene.B. They both react with oxygen gas to form sulphur dioxide gas.C. They have the same melting and boiling points.D. They both have simple molecular lattices.4 }9.Which of the following best explains the properties of a transition element?A. An element which is very hard, dense, and has a high melting point.B. An element which has a partly filled 'd' subshell and electrons in the 4s subshell.C. An element which shows more than one oxidation state and forms coloured compounds.D. A 'd' block element which forms at least one ion with a partially filled 'd' subshell.10.The pie chart shown in Figure 1 below represents the use of chlorine and its compounds inthe country Essos. If the sectors shown by the letters A, D and E represent herbicides,polymers and aerosols respectively, which one of the following would Sector C most likelynot represent?A. Sterilising drinking water.B. Food preservatives.C. Pesticides.D. Bleaches.6.

"Since there are multiple questions and it is not mentioned that which one has to be solved so I am…

5. Which treatment is frequently used to protect aluminium articles from subsequent erosion? A. Making aluminium the anode during electrolysis. B. Dipping the aluminium in hot aqueous sodium hydroxide. C. Dipping the aluminium in molten cryolite. D. Coating the aluminium with a less reactive metal.

5. Which treatment is frequently used to protect aluminium articles from subsequent erosion? A. Making aluminium the anode during electrolysis. B. Dipping the aluminium in hot aqueous sodium hydroxide. C. Dipping the aluminium in molten cryolite. D. Coating the aluminium with a less reactive metal.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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