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Standard VIII
Physics
Question

When electric current is passed through water, dissociation is indicated __________.
  1. in the form of bubbles
  2. by color change
  3. both a and b
  4. none of above

A
by color change
B
in the form of bubbles
C
none of above
D
both a and b
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Solution
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When electric current is passed through water, water dissociates into hydrogen and oxygen. Hydrogen is deposited over negative pole and oxygen is deposited over positive pole. Deposition of hydrogen and oxygen at different poles is visible in the form of bubbles.

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