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SAI INTERNATIONAL SCHOOL

CLASS - VIII

Subject – CHEMISTRY

Chapter – CHEMICAL EFFECTS OF ELECTRIC CURRENT

TOPIC – Electrolytes and It Types, Electrical Circuit

HOME ASSIGNMENT

Objective:

Q. No. Questions
1. Cations and anions present (if any) in NH 4NO 3 are:
2-
3+
a) Anions – NO 3 , Cation – NH 4
2+
-
b) Anions – NO 3 , Cation – NH 4
+
2-
c) Anions – NO 3 , Cation – NH 4
+
-
d) Anions – NO 3 , Cation – NH 4
2+
2. How many protons and electrons are present in Ca ion?
(a) 20 protons & 20 electrons (b) 20 protons & 22 electrons
(c) 20 protons & 18 electrons (d) 18 protons & 18 electrons
3. Which of the following is the best conductor of electricity?
(a) Tap water (b) Distilled water
(c) Sea water (d) Rain water
4. Two particles X and Y have the composition as shown in table. The particles X and Y are:

Numbers
Particle Number of electrons
of protons

X 10 8

Y 18 17

a) X is negative ion and Y is positive ion
b) Y is negative ion and X is positive ion
c) Both are positive ions
d) both are negative ions
5. Which of the following liquids is a bad conductor of electricity?
a) Distilled water

b) Vinegar
c) Sea water
d) Lemon juice

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