Test grade 9 C feb chem chap 7

What is your complete name?

What is your father name?

Admission number?

Class and Section?

Loss of electron by a molecule is called its _______________?

• Reduction

• Oxidation

• galvanizing

• electroplating

Identify the element which undergo oxidation?

• Cu

• O

• N

• None of these

what is the oxidation state of nitrogen in N₂O₃?

• 1

• 2

• 3

• 4

The cell that converts chemical energy into electricity is called _____________ cell?

• Galvanic

• Electrolyte

• non-electrolyte

• Electrolytic

Which of the following compound is non-electrolyte?

• Sodium chloride

• Sodium hydroxide

• Hydrochloric acid

• Sucrose

Which of the following ion is extremely toxic?

• Zn⁺²

• CN^-1

• Cu⁺²

• K⁺¹