!"#$%#&'()$*"+,-./*012*3405 Practice your Chemistry Knowledge HEPTA INTERACTION QUESTIONS (11th series) Scopes : Electrochemistry and related reactions. Q1. In the electrolysis of dilute H2SO4, using Pt electrode (a) O2 is produced at the cathode (b) SO2 is produced at the cathode (c) H2 is liberated at the cathode (d) O2 is produced at the anode Q2. A current of 9.65 A is drawn from a Daniel cell for exactly 1 hour. The loss in mass of anode & gain in the mass of cathode will be (a) 11.77 g, 11.43 g (b) 11.43 g, 11.77 g (c) 23.54 g, 22.86 g (d) 22.86 g, 23.54 g Q3. The most durable metal plating on iron to prevent against corrosion is (a) Nickel plating (b) copper plating (c) tin plating (d) Zinc plating Q4. The condition produced by aerial oxidation of fats and oils in food marked by unpleasant smell is called (a) Acidity (b) corrosion (c) bacisity (d) rancidity Q5.In the context of redox reactions, the removal of hydrogen from a substance is known as (a) oxidation (b) dehydration (c) reduction (d) dehydrogenation Q6. In order to prevent the spoilage of potato chips they are are packed in plastic bags in an atmosphere of (a) Cl2 (b) H2 (c) N2 (d) O2 Q7. Consider the following reaction of metal, M 2M+O2!"#$%&'()*&+,-.')/0&1+21+*+0'* (a) Combination reaction as well as reduction reaction (b) Decomposition reaction as well as oxidation reaction (c) Oxidation reaction as well as displacement reaction (d) Combination reaction as well as oxidation Q8. Which of the following can be decomposed by the action of light (a) NaCl (b) KCl (c) AgCl (d) CuCl Q9. You are given the solution of lead nitrate and which of the following solution will be added to get a yellow precipitate (a) KCl (b) KNO3 (c) K2S (d) KI 3456&7(+&1+.8')/0&9+':++0&,-)8;<)=+&.0>& water is characterized by (a) Evolution of H2 (b) formation of slaked lime (c) Change in temperature (d) Change in colour of the product Answers in the 12th series Ans. of 10th Series Q1 (c), Q2 (b), Q3 (a), Q4 (d), Q5 (c), Q6 (b), Q7 (b), Q8 (b), Q9 (a), Q10 (d) Hepta Interaction Centre most welcomes your suggestion(s) to improve this sheet in the next series. M. Aken Singh (9862125442) e-mail:[email protected] Or [email protected]