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Question
Which of the following is an endothermic reaction?
Options:
A .  HCI + NaOH → NaCl + H2O
B .  HCI + NaHCO3 → NaCl + CO2 + H2O
C .  NaCl + AgNO3 → AgCl + NaNO3
D .  Zn + CuSO4 → ZnSO4 + Cu
Answer: Option B
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