Which of the following are combination reactions ?
(a) 2KCIO3 of heat )) 2KCI + 302
(b) 4Al + 302 2A1203
(c) Zn + FeSO4 ZnSO4 +fe
(d) CH4 + 202 CO2 + 2H2O
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option b is an example of combination reaction
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