5. Which of the following does not take place
a. Ca + 2HCl → CaCl2 + H2
b. Zn + H2SO4 → ZnSO4 + H2Z
Fe + 2HCl → FeCl2 + H2
d. Cu + H2SO4 → CuSO4 + H2
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Answer:
(d)...................
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