Which of the following involves combination of two elements ?
(a) N2(g) + 3H2(g)→2NH3(g)
(b) CaO(s) + CO2(g)→CaCO3(g)
(c) 2502(g) + O2(g)→2503f(g)
(d) NH3(g) + HCl(g)→NH4Cl(s)
Answers
Answered by
2
Answer:
option a is right.
remaining are combination of molecules
Answered by
1
Answer:
a one carries two element.
Explanation:
because it contains nitrogen and hydrogen while rest contain molecules.
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