- Q1: What effect of electric current causes chemical changes in a liquid?
Answer: Chemical
Explanation: When electric current passes through some liquids, it produces chemical effects like gas bubbles or deposition of metal. - Q2: What is formed on electrodes when current is passed through copper sulphate solution?
Answer: Deposits
Explanation: A reddish-brown deposit of copper forms on the negative electrode due to chemical reaction. - Q3: Which solution allows electricity to pass and shows chemical effects?
Answer: Electrolyte
Explanation: Electrolytes are liquids that conduct electricity and undergo chemical changes. - Q4: What do we call the process of depositing a layer of metal using electricity?
Answer: Electroplating
Explanation: Electroplating is a method to coat a metal object with another metal using electric current. - Q5: What is a visible sign of chemical change during electrolysis?
Answer: Bubbles
Explanation: Bubbles are often formed at electrodes due to release of gases during the chemical reaction. - Q6: What metal is commonly used for electroplating jewelry?
Answer: Gold
Explanation: Gold is used to coat inexpensive ornaments to make them look attractive and prevent rust. - Q7: Which component glows when current passes through a conducting liquid in a tester?
Answer: Bulb
Explanation: If the liquid conducts electricity, the bulb in the tester circuit glows. - Q8: What kind of liquids mostly show chemical effects of current—pure or acidic?
Answer: Acidic
Explanation: Acidic liquids contain ions which help conduct electricity and show chemical changes. - Q9: What is the rod dipped in a liquid during electroplating called?
Answer: Electrode
Explanation: Electrodes are metal rods inserted into an electrolyte to carry current and allow chemical changes. - Q10: What do we call the solution used in electroplating?
Answer: Electrolyte
Explanation: The electrolyte contains metal ions that deposit on the object during electroplating.
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