21-06-2016
Chemistry

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Which of these reactions can be classified as double replacement reactions?

Zn + 2HCl → ZnCl2 + H2

2NaCl + F2 → 2NaF + Cl2

2AlBr3 + 3K2SO4 → 6KBr + Al2(SO4)3

2K + MgBr2 → 2KBr + Mg

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Willchemistry Willchemistry

22-06-2016

Zn + 2 HCl = ZnCl₂ + H₂ ( single replacement )

2 NaCl + F₂ = 2 NaF + Cl₂( single replacement )

2 AlBr₃ + 3 K₂SO₄ = 6 KBr + Al₂(SO₄)₃ ( double replacement )

2 K + MgBr₂ = 2 KBr + Mg ( single replacement )

Answer C

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