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Answer 1

$1, {CuCl}_{2} + 2 KOH \to Cu {(OH)}_{2} + 2 KCl 2, Mg {(OH)}_{2} + 2 HCl \to {MgCl}_{2} + 2 H_{2} O 3, Mg {(OH)}_{2} + H_{2} {SO}_{4} \to {MgSO}_{4} + 2 H_{2} O 4, CuO + 2 HCl \to {CuCl}_{2} + H_{2} O 5, {Fe}_{2} O_{3} + 3 H_{2} {SO}_{4} \to {Fe}_{2} {({SO}_{4})}_{3} + 3 H_{2} O 6, Pb {({NO}_{3})}_{2} + 2 NaOH \to Pb {(OH)}_{2} + 2 {NaNO}_{3} 7, 4 K + O_{2} \to 2 K_{2} O 8, N_{2} + O_{2} \to 2 NO 9, 2 NO + O_{2} \to 2 {NO}_{2} 10, 2 {NO}_{2} + O_{2} + 2 H_{2} O \to 4 {HNO}_{3} 11, K_{2} O + H_{2} O \to 2 KOH 12, Ca {(OH)}_{2} + K_{2} {CO}_{3} \to {CaCO}_{3} + 2 KOH 13, {Fe}_{2} O_{3} + 3 H_{2} \to 2 Fe + 3 H_{2} O 14, 2 Al {(OH)}_{3} + 6 HCl \to 2 {AlCl}_{3} + 6 H_{2} O 15, {FeCl}_{3} + 3 NaOH \to Fe {(OH)}_{3} + 3 NaCl 16, 3 {AgNO}_{3} + K_{3} {PO}_{4} \to {Ag}_{3} {PO}_{4} + 3 {KNO}_{3} 17, {SO}_{2} + Ca {(OH)}_{2} \to {CaSO}_{3} + H_{2} O 18, 2 K + {Cl}_{2} \to 2 KCl 19, CuS + 2 HCl \to {CuCl}_{2} + H_{2} S 20, Mg {(OH)}_{2} + 2 {HNO}_{3} \to Mg {({NO}_{3})}_{2} + 2 H_{2} O$ ..

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Answer 2

$1, {CuCl}_{2} + 2 KOH \to Cu {(OH)}_{2} + 2 KCl 2, Mg {(OH)}_{2} + 2 HCl \to {MgCl}_{2} + 2 H_{2} O 3, Mg {(OH)}_{2} + H_{2} {SO}_{4} \to {MgSO}_{4} + 2 H_{2} O 4, CuO + 2 HCl \to {CuCl}_{2} + H_{2} O 5, {Fe}_{2} O_{3} + 3 H_{2} {SO}_{4} \to {Fe}_{2} {({SO}_{4})}_{3} + 3 H_{2} O 6, Pb {({NO}_{3})}_{2} + 2 NaOH \to Pb {(OH)}_{2} + 2 {NaNO}_{3} 7, 4 K + O_{2} \to 2 K_{2} O 8, N_{2} + O_{2} \to 2 NO 9, 2 NO + O_{2} \to 2 {NO}_{2} 10, 2 {NO}_{2} + O_{2} + 2 H_{2} O \to 4 {HNO}_{3} 11, K_{2} O + H_{2} O \to 2 KOH 12, Ca {(OH)}_{2} + K_{2} {CO}_{3} \to {CaCO}_{3} + 2 KOH 13, {Fe}_{2} O_{3} + 3 H_{2} \to 2 Fe + 3 H_{2} O 14, 2 Al {(OH)}_{3} + 6 HCl \to 2 {AlCl}_{3} + 6 H_{2} O 15, {FeCl}_{3} + 3 NaOH \to Fe {(OH)}_{3} + 3 NaCl 16, 3 {AgNO}_{3} + K_{3} {PO}_{4} \to {Ag}_{3} {PO}_{4} + 3 {KNO}_{3} 17, {SO}_{2} + Ca {(OH)}_{2} \to {CaSO}_{3} + H_{2} O 18, 2 K + {Cl}_{2} \to 2 KCl 19, CuS + 2 HCl \to {CuCl}_{2} + H_{2} S 20, Mg {(OH)}_{2} + 2 {HNO}_{3} \to Mg {({NO}_{3})}_{2} + 2 H_{2} O$ ..

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