27. Identify the combination reaction from the following.
a) C2H4+H2 → C,H,
b) NH C1—^—NH, + HCI
c) Zn + 2 AgNO, → Zn(NO,)2 + 2 Ag
d) MgO+H,0> Mg(OH), + Heat
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a ) is the right..........
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Answer:
option a and d are the correct answers...
mark as brainlist...
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