Concentrated aqueous sodium chloride is electrolysed using graphite electrodes. What is the product formed at the cathode?
A.
chlorine
B.
hydrogen
C.
oxygen
D.
sodium
Exam No：0620_m24_qp_12 Year：2024 Question No：11
Answer:
C
Knowledge points:
9.1.1.1. thermal conductivity
9.1.1.2. electrical conductivity
9.1.1.3. malleability and ductility
9.1.1.4. melting points and boiling points
9.1.2.1. dilute acids
9.1.2.2. cold water and steam
9.1.2.3. oxygen
Solution:
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