NCERT Class 8 Science Chapter 14 Chemical Effects of Electric Current Solutions
NCERT Class 8 Science Chapter 14 Chemical Effects of Electric Current Solutions NCERT TEXT BOOK EXERCISES Q. 1. Fill in the blanks: (a) Most liquids that conduct electricity are solutions of _________ and __________. Ans. acids and bases. (b) The passage of an electric current through a solution causes ________ effect. Ans. chemical. (c) If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the_____ terminal of the battery. Ans. negative. (d) The process of depositing a layer of any desired metal on another metallic object, by means of electricity, is called. Ans. electroplating. Q. 2. When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason? Ans. The deflection of magnetic needle shows that the solution is a good conductor. Q. 3. Name three liquids, which when tested in the manner shown in figure 14.11 may cause the magnetic needle to direct. Ans. (i) Vinegar. (ii) Lemon ...