WorksheetsTest grade 9 C feb chem chap 7
Total questions: 18
Worksheet time: 18mins
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
Coating a metal with the thin layer of ___________ metal is called Galvanizing.
Cu
Fe
Zn
Sn
Which of the following method is used to prevent underground water tanks from rusting?
Electroplating
Galvanizing
Cathodic protection
Tin plating
The process in which a metal react with atmospheric oxygen and moisture to give metal oxide is called __________?
Galvanizing
Extrapolating
Reduction
Corrosion
The process in which iron is mixed with other metals ( e.g stainless steel) to prevent it from rusting is called ____________?
Electroplating
Alloying
Coating
Galvanizing
Which metal is extensively used in construction of aircraft?
Al
Cu
Au
Ag
The above cell is called _______________ cell.
Nelson's
Electrolytic cell
Daniel
Dry cell
Which of the following cell is used for the commercial preparation of sodium hydroxide?
Nelson's
Daniel
Anodizing of Al
Galvanizing
The oxidation state of any uncombined or free element is always ___________.
0
1
2
3
