(b) NaOH + H2SO4 → Na2SO4+H2O
(c) NaCl + H2SO4 → Na, SO4 + HCI
(d) Cu + H2SO4 → CuSO4 + H2O + SO
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Explanation:
(b) 2NaOH + H2SO4 => Na2SO4 + H2O
(c) 2NaCl + H2SO4 => Na2SO4 + 2HCl
(d) CuO +H2SO4 => CuSO4 +H2O
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