Which of the following will be able to react with dilute $HCl$ to give hydrogen gas?

  • A
    $Cu$
  • B
    $Mg$
  • C
    $Hg$
  • D
    $Ag$

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Give advantages of fuel cell.

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What is a galvanic cell? Give the half-cell reactions of a Daniell cell and explain a redox couple.

Assertion : Galvanised iron does not rust.
Reason : Zinc has a more negative electrode potential than iron.

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