Questions 68 - 71. Questions 77 - 81. The following are some types of catalysis most The following are some instruments used to follow often used to alter rates of chemical reactions. A Heterogeneous catalysis. B. Autocatalysis C. Homogeneous catalysis D. Inhibition catalysis. up the rale of reaction. A. Spectrophotometer B. Manometer B. Polarimeter D. None of the above Select from A to D the instrument that can be used to follow-up the rate of the reaclion. 77. CH,(g) + Br (aq) 78. 20,(g) - 30 (9) 79. NO2(g) + C09g) NO(g) + CO2(g) Select from the list A to D the ype of catalysis that the underlined substance is in the following CH Br.(aq) reaction. 68 Alumina alters the rate of dehydration of ethanol to ethene. 69. manganese () ions alters the rate of the 80 H2(g) + F2(g)- 2HF(s) reaction 81C H 0, (aq H O(1)>C,H,O,(aq)fC,H O (ag) glucose fructose 2Mno (aq)+6H (aq)+5H.0(aq)> 2Mn (aq)+50 (g)+SH,O() sucrose as soon as a trace amount of manganese Questions 82 - 89 concern the graphs below. (II) ions appear in the reaction medium. 70. Hydrogen ions alter the rate of the reaction between iodine and propenone. 71. Iron (II) ions alter the rate of the reaction between iodide ions and peroxodisulphate YA fons Questions 72 - 76. The following are some terms used in reaction kinetics. A. Rate determining step B. Molecularity C. Order of reaction. D. Elementary reactions. Select from A-D the term that most suils 72. a sequence of individual step(s) which together make up the proposed reaction mechanism. 73. the number of reacting species that take part in a reaction step. 74 the number to which the concentrations of Select the graph which represents a plot of 82. the half-life (y-axis) against concentration for a first order reaction. 83. the rate of reaction (y-axis) against concentration for a zero order reaction. 84. the half-life (y-axis) against concentration for a zero order reaction. 85. reactants are raised in the rate expression. 75. the reaction steps that limits how fast the overali reaction proceeds. 76. The step in the reaction mechanism whose rate law is identical to the rate law of the the concentration (y-axis) against time for zero order reaction. 86. the rate constant (k) (y-axis) against the absolube temperature. 87. the In of rate constant (y-axis) against the inverse of the absolute temperature. 88. the rate of reaction (y-axis) agains! concentration for a second order reaction 89. the rate of reaction (y-axis) against concentration for a second order eaction. overal reaction. 166 阳