Question

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Answer 1

Explanation:

15. Complete the following chemical reaction :-

a)

When sodium hydroxide reacts with Hydrochloric acid then it forms sodium chloride and water.

Chemical equation -

NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l)

b)

When magnesium hydroxide reacts with sulphuric acid then it forms magnesium sulphate and water.

Chemical equation -

Mg(OH)2 (aq) + H2SO4 (aq) → MgSO4 (aq) + 2H2O

c)

when calcium hydroxide reacts with sulphuric acid then it forms calcium sulphate and water.

Chemical equation -

Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

d)

When silver nitrate is react with copper then copper displace silver from silver nitrate and copper nitrate and silver is produced.

Chemical equation -

2AgNO3 + Cu → Cu(NO3)2 + 2Ag

e)

When calcium hydroxide reacts with carbon dioxide then calcium carbonate and water is produced.

Chemical equation -

Ca(OH)2 + CO2 → CaCO3 + H2O

16. Balance the following chemical reaction :-

a) 2Na + Cl2 → 2NaCl (Combination reaction)

b) 2H2O → 2H2 + O2 (Decomposition reaction)

c) CaCO3 → CaO + CO2 (Decomposition reaction)

d) H2SO4 + 2NaOH → Na2SO4 + 2H2O (Displacement reaction)

e) Cu + 2AgNO3 → Cu(NO3)2 + 2Ag (Displacement reaction)

f) 3Fe + 2O2 → Fe3O4 (Combination reaction)

g) 2Zn + O2 → 2ZnO (Combination reaction)

h) N2 + 3H2 → 2NH3 (Combination reaction)

Answer 2

Answer:

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