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SAI International School

Class – VIII
Subject – Chemistry

Topic – Chemical Effects of Electric Current
Sub-Topic – Electrodes, Types of Electrodes, Ions and its Types

HOME ASSIGNMENT
Objective:

Q. No. MCQ Questions
1. Which one of the following is correct pair??
a) Cathode - Negative electrode b) Anode - Negative electrode
c) Cation - Negative ion d) Atom - Negative ion.

2. What is current??
a) The flow of matter b) The flow of atoms
c) The flow of protons d) The flow of charge
3. Which of the following ions will get attracted towards a cathode?
2+
2+
-
a) Ca b) Cl c) Mg d) both (a) & (c)
4. Which of the following have the equal number of electrons?
–
–
+
2+
a) Cl and Br b) Na and Mg
c) Ar and Ne d) Mg and Ca
2+
2+
2+
5. While forming Fe , the number of electrons lost by Fe atom is ________.
a) 2 b) 3 c) 0 d) 1

Subjective:
Q. No. Questions Marks
1. Hydrogen and metallic ions are _______because they _______ electrons. 1

2. Define ‘Electrical conductivity’. 1
3. Give two differences between an atom and an ion, along with one each 3
example.
4. Pick out the cations and anions from the list given below: 3
2-
i. SO4
+
ii. NH4
iii. OH
-
iv. Cl
1-
2+
v. Cu
1-
vi. NO3
5. Define the following terms : 5
a) Electrode
b) Cathode
c) Anode

d) Anion
e) Cation

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