Question

1. *The valency of sodium is 1, the valency of SO₄ is 2, then the chemical formula of the compound is ______.*

1️⃣ Na₂SO₄
2️⃣ Na(SO₄)₂
3️⃣ Na(SO₄)
4️⃣ 2Na₂SO₄

2. *Which of the following does not fit into the group according to the property of the composite radical?*

1️⃣ NH₄⁺
2️⃣ SO₄²⁻
3️⃣ Mg²⁺
4️⃣ OH⁻


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Answer 1

Answer:

Na2So4

SO4 2-

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Answer 2

Answer:

Explanation:

1. Na2(So4)

2. SO4 2-

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