InterviewSolution
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Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.(a) Identify A and B and give their reactions with dil HCL and dil H2SO4(b) Give the effect of heat on their:(i) oxides (ii) hydroxide (iii) carbonates (iv) nitrates |
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Answer» Metal A is more reactive than Metal B. (a) Metal A is Na (Sodium). Metal B is Ca (Calcium). Reaction with HCl: 2Na + 2HCl →2NaCl + H2 Ca +2HCl →CaCl2 + H2 Reaction with H2SO4 : 2Na + H2SO4 →Na2SO4 + H4 Ca + H2SO4 →CaSO4 + H2 (b) (i) Oxides: Sodium and calcium oxides are stable to heat. (ii) Hydroxides: Sodium hydroxide is stable to heat whereas calcium hydroxide decomposes on heating to metal oxide and water vapor. (iii) Carbonates: Sodium carbonate is stable to heat whereas calcium carbonates decompose on heating to form calcium oxide and carbon dioxide. (iv) Nitrates: Sodium nitrate on heating form nitrite and oxygen whereas calcium nitrate decomposes on heating to form calcium oxide, nitrogen dioxide and oxygen. |
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