Answer & Solution
Answer: Option B
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52. A smuggler could not carry gold by depositing iron on the gold surface, because
53. What is an endothermic reaction?
54. Which of the following reaction is an example of exothermic reaction?
55. The depolarisation in a primary cells is used for the purpose of
56. When an acid cell is charged, then
57. To protect iron against corrosion, the durable metal plating on it, is
58. Consider the following statements.
The electrochemical series helps
1. in extraction of metals.
2. in protecting themetal fromcorrosion.
3. in comparing the reactivity of metals.
Which of the above is/are true?
The electrochemical series helps
1. in extraction of metals.
2. in protecting themetal fromcorrosion.
3. in comparing the reactivity of metals.
Which of the above is/are true?
59. Which of the following statements about the commonly used automobile battery are true?
1. It is usually a lead-acid battery.
2. It has six cells with a potential of 2V each.
3. Its cells work as galvanic cells while discharging power.
4. It cells work as electrolytic cells while recharging.
Select the correct answer:
1. It is usually a lead-acid battery.
2. It has six cells with a potential of 2V each.
3. Its cells work as galvanic cells while discharging power.
4. It cells work as electrolytic cells while recharging.
Select the correct answer: