Банк заданий
ОГЭ по химии

А) $NH_{3}$ и $HCl$

1) $NCl_{3}$ и $H_{2}$

Б) $Li_{2}O$ и $H_{2}O$

2) $Li_{2}O$ и $H_{2}$

В) $Li$ и $H_{2}O$

3) $LiOH$

4) $NH_{4}Cl$

5) $LiOH$ и $H_{2}$

А) $K_{2}S + H_{2}SO_{4}(р-р)→$

1) $→ K_{2}SO_{3} + H_{2}O$

Б) $K_{2}O + H_{2}SO_{3}(р-р)→$

2) $→ KHS + SO_{3}$

В) $H_{2}S + KOH→$

3) $→ K_{2}SO_{4} + H_{2}O$

4) $→ K_{2}SO_{4} + H_{2}S$

5) $→ K_{2}S + H_{2}O$

А) $Cu + HNO_{3}(конц.)→$

1) $Cu(NO_{3})_{2} + H_{2}O$

Б) $Cu(OH)_{2} + HNO_{3}(конц.)→$

2) $CuS + N_{2} + H_{2}O$

В) $Cu(NO_{3})_{2} + H_{2}S→$

3) $Cu(NO_{3})_{2} + H_{2}$

4) $Cu(NO_{3})_{2} + NO_{2} + H_{2}O$

5) $CuS + HNO_{3}$

А) $NaHCO_{3}→$

1) $→ Na_{2}O + CO_{2} + H_{2}O$

Б) $Ca(HCO_{3})_{2}→$

2) $→ Na_{2}CO_{3} + CO_{2} + H_{2}O$

В) $CaCO_{3}→$

3) $→ CaCO_{3} + CO_{2} + H_{2}O$

4) $→ CaO + CO_{2}$

5) $→ Ca + CO_{2} + H_{2}O$

А) $FeSO_{4}$ и $Na_{2}S$

1) $FeSO_{4}$ и $H_{2}O$

Б) $Fe$ и $H_{2}SO_{4}$(разб.)

2) $Fe_{2}(SO_{4})_{3}$ и $H_{2}$

В) $FeO$ и $H_{2}SO_{4}$(разб.)

3) $FeS$ и $Na_{2}SO_{4}$

4) $FeSO_{4}$ и $H_{2}$

5) $FeO$ и $Na_{2}SO_{4}$