Electrolysis
ICSE · Class 10 · Chemistry
Flashcards for Electrolysis — ICSE Class 10 Chemistry. Quick Q&A cards covering key concepts, definitions, and formulas.
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Get startedWhat are electrolytes? Give two examples.
Answer
Electrolytes are substances that conduct electricity either in the fused state or in aqueous solution state by movement of ions. They undergo chemical change during the passage of electric current. Ex…
What are non-electrolytes? Give two examples.
Answer
Non-electrolytes are substances that do not conduct electric current either in the fused state or in aqueous solution state. They do not undergo chemical change during passage of current. Examples: Gl…
Differentiate between strong and weak electrolytes.
Answer
Strong electrolytes dissociate almost completely (100%) into ions in solution, conduct large amounts of current, and contain almost only free ions. Examples: HCl, NaOH, NaCl. Weak electrolytes dissoci…
Define electrolysis and state its main characteristics.
Answer
Electrolysis is the process where passage of direct current through an electrolyte brings chemical changes involving reduction at cathode and oxidation at anode. Characteristics: (1) Requires DC curre…
What are electrodes? Define anode and cathode.
Answer
Electrodes are metal plates or graphite rods used for passing current through an electrolyte. Anode is the electrode connected to positive terminal where oxidation occurs (electrons are lost). Cathode…
Define cations and anions with examples.
Answer
Cations are positively charged ions formed when atoms lose electrons. They move towards cathode during electrolysis. Examples: Na⁺, Cu²⁺, Al³⁺. Anions are negatively charged ions formed when atoms gai…
What is the electrochemical series and what does it indicate?
Answer
The electrochemical series is the arrangement of metals in order of their decreasing tendency to lose electrons to form cations. Metals at the top lose electrons more easily (like Li, K, Na), while th…
Write the electrode reactions for electrolysis of molten lead bromide (PbBr₂).
Answer
Ionization: PbBr₂ (molten) → Pb²⁺ + 2Br⁻ At cathode (reduction): Pb²⁺ + 2e⁻ → Pb (silvery grey deposit) At anode (oxidation): 2Br⁻ → Br₂ + 2e⁻ (reddish brown fumes) Products: Lead metal at cathode, Br…
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