Chemical Effects of Electric Current Class 8 Worksheets. We covered all the Chemical Effects of Electric Current Class 8 Worksheets MCQs in this post for free so that you can practice well for the exam.
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Chemical Effects of Electric Current Class 8 Worksheets Objective for Students
Which of the following is/are correct for conductors? 1. They allow the flow of electricity. 2. Solutions of weak electrolytes are good conductors.
(a) Only 1
(b) Only 2
(c) Both 1 & 2
(d) Neither 1 nor 2
Option a – Only 1
Which of the following is/are correct for electrolytic solution? 1. Electrolyte conducts electricity when dissolved in water. 2. Sodium chloride, sugar solution, and sulfuric acid are electrolytic solutions.
(a) Only 1
(b) Only 2
(c) Both 1 & 2
(d) Neither 1 nor 2
Option a – Only 1
Which of the following is/are correctly matched? 1. Electrolyte – conductor 2. Cation – positive ion 3. Bakelite – poor conductor.
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2, and 3
Option d – 1, 2, and 3
Which of the following is the correct order of conductivity?
(a) Alloys > insulators > semiconductors
(b) Insulators > alloys > semiconductors
(c) Alloys > semiconductors > insulators
(d) Semiconductor > alloys > insulators
Option c – Alloys > semiconductors > insulators
Which of the following is/are correct for LED? 1. It emits light only when a weak current flows through it. 2. It is an electronic device. 3. The longer lead is positive.
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2, and 3
Option b – 2 and 3
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