Practical Planning: Does it produce gas?

Does this reaction produce a gas: Magnesium metal and hydrochloric acid

Does this reaction produce a gas: Magnesium carbonate and nitric acid

Does this reaction produce a gas: Magnesium hydroxide and nitric acid

Does this reaction produce a gas: Zinc oxide and sulfuric acid

Does this reaction produce a gas: Pb²⁺(aq) + 2I^–(aq) → PbI₂ (s)

Does this reaction produce a gas: Cu (s) + 2 Ag⁺(aq) →Cu²⁺(aq) + 2 Ag(s)

Does this reaction produce a gas: 2MnO₄^— (aq) + 6H⁺ (aq) + 5H₂O₂ (aq) → 2Mn²⁺ (aq) + 5O₂(g) + 8H₂O(l)

Does this reaction produce a gas: H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄ (aq) + 2H₂O (l)

Does this reaction produce a gas: MnO₄^–(aq) + 5SO₂ (g) + 2H₂O (ι) → 2Mn²⁺ (aq) + 5SO₄^2- (aq) + 4H⁺ (aq)