Class 10 Chemistry Chapter 16 Electrochemistry Test 1 – Punjab Board 2027
Grade 10 Chemistry Chapter 16 Electrochemistry Class test
Prepare for your exams with the Class 10 Chemistry Chapter 16 Electrochemistry Class Test 1, designed according to the Punjab Board 2027 Model Papers and the latest syllabus. This Chemistry chapter test helps students practise important questions, strengthen their understanding of electrochemistry, and improve their preparation for the Class 10 Chemistry board examination. Students can use this Class 10 Chemistry Chapter 16 Test 1 for revision, self-assessment, and exam practice according to the Punjab Board paper pattern.
1. The apparent charge on an atom is called
- A. Oxidation
- B. Oxidation number
- C. Reduction
- D. Reducing agent
2. The principal oxidation number of oxygen in aluminum oxide is:
- A. +1
- B. +2
- C. −2
- D. −3
3. The formula of ammonium carbonate is:
- A. NH4CO3
- B. (NH4)CO3
- C. (NH4)2CO3
- D. NH42CO3
4. The formula of nitrate ion is:
- A. NO2−
- B. NO3−
- C. N2O3−
- D. N2O4−
5. In the reaction of KMnO4 with KI, iodide ion is converted into:
- A. I−
- B. I2
- C. IO3−
- D. I3−
6. Standard electrode potential of lithium is
- A. −3.04
- B. −3.40
- C. −2.93
- D. −2.71
7. What gas is produced at the anode?
- A. Hydrogen
- B. Oxygen
- C. Sulphur dioxide
- D. Chlorine
8. The article to be electroplated is made:
- A. Anode
- B. Cathode
- C. Electrolyte
- D. None of the above
9. In a Daniel cell, zinc acts as:
- A. Cathode
- B. Anode
- C. Electrolyte
- D. Porous partition
10. The standard cell voltage of a Daniel cell under standard conditions is approximately:
- A. 0.34 V
- B. 0.76 V
- C. 1.10 V
- D. 2.00 V
Attempt any 10 Questions.
i. Write the importance of oxidation number.
- identify whether a species is oxidized or reduced;
- balance redox equations;
- name compounds (e.g. iron(II) and iron(III) compounds) and find oxidizing / reducing agents.
ii. Write any two rule of oxidation number.
- The oxidation number of an element in its free state is zero (e.g. Na, O2, Cl2).
- The oxidation number of oxygen is −2 in most compounds (except peroxides, where it is −1) and of hydrogen is +1 (except metal hydrides, where it is −1).
iii. Why is the formula of calcium chloride written as CaCl2?
iv. Write the three ways to describe the oxidation and reduction.
- Electron transfer: oxidation is loss of electrons; reduction is gain of electrons.
- Oxygen / hydrogen: oxidation is gain of oxygen or loss of hydrogen; reduction is loss of oxygen or gain of hydrogen.
- Oxidation number: oxidation is an increase in oxidation number; reduction is a decrease in oxidation number.
v. Define reduction in terms of electrons.
vi. What is electrolysis?
vii. What is brine?
viii. Write the reaction occur at cathode.
- Molten NaCl: Na+ + e− → Na
- Brine: 2H2O + 2e− → H2 + 2OH−
ix. What is a fuel cell?
x. What are the main disadvantages of hydrogen fuel cells?
- Hydrogen is difficult and costly to store and transport (highly flammable gas).
- Catalysts such as platinum are expensive, so the cell is costly.
- Producing pure hydrogen needs a lot of energy.
xi. What is rusting?
xii. What is galvanization?
xiii. Write the name of the three objectives of electroplating.
- To protect metals from corrosion.
- To improve the appearance (decoration).
- To increase hardness, thickness or wear resistance of the article.
xiv. Write the condition during the electroplating.
- The article to be plated is made the cathode; the plating metal is the anode.
- The electrolyte is a solution of a salt of the plating metal.
- A direct current is used, and the article must be clean.
