Chemical Effects of Electric Current Exam Questions Class 8 Science

Exam Questions Class 8

Please refer to the Chemical Effects of Electric Current Notes Class 8 Science given below. These revision notes have been designed as per the latest NCERT, CBSE, and KVS books issued for the current academic year. Students will be able to understand the entire chapter in your class 8 th Science book. We have provided chapter-wise Notes for Class 8 Science as per the latest examination pattern.

Revision Notes Chapter 14 Chemical Effects of Electric Current Class 8 Science

Students of Class 8 Science will be able to revise the entire chapter and also learn all important concepts based on the topic-wise notes given below. Our best teachers for Grade 8 have prepared these to help you get better marks in upcoming examinations. These revision notes cover all important topics given in this chapter.

Question. (a) Name three liquids , which when tested in the manner shown in figure may cause the
magnetic needle to deflect .

Chemical Effects of Electric Current Exam Questions Class 8 Science

Answer :

I. Saltwater
II. Lemon juice
III. Vinegar
(b) Name the gases produced on passing electricity through water.
Answer :
Hydrogen and oxygen gas

Question. (a) What is the common name of carbon rods in the diagram ?

Chemical Effects of Electric Current Exam Questions Class 8 Science

Answer : Electrodes (Anode for positive (+) terminal and Cathode for negative (-) terminal)
(b) Name the gases produced on passing electricity through water.
Answer :
Hydrogen and oxygen gas
(c) What should be added in distilled water to increase its conductivity?
Answer :
Adding, a small amount of hydrochloric acid will increase its conductivity.
(d) Which effect of electricity is used in above diagram?
Answer :
Chemical effect of electric current