Chemistry
Write word equations for the following chemical reactions given below. Also state the observation seen in each case.
ZnCO3 ZnO + CO2
NaCl + AgNO3 ⟶ AgCl ↓ + NaNO3
Na2SO3 + 2HCl 2NaCl + H2O + SO2
Pb(NO3)2 + 2NH4OH ⟶ 2NH4NO3 + Pb(OH)2 ↓
Chemical Equation
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Answer
Zinc carbonate ⟶ Zinc oxide + Carbon dioxide.
White coloured zinc carbonate changes to yellow coloured zinc oxide.Sodium Chloride + Silver nitrate ⟶ Silver chloride + Sodium nitrate.
A milky white coloured precipitate of silver chloride is formed when silver nitrate solution is added to sodium chloride solution.Sodium sulphite + Hydrochloric acid ⟶ Sodium chloride + Water + Sulphur dioxide
Effervescence of pungent smelling gas sulphur dioxide are seen.Sulphur dioxide + Oxygen ⇌ Sulphur trioxide
It is an exothermic reaction and heat is evolved.Lead nitrate + Ammonium hydroxide ⟶ Ammonium nitrate + Lead hydroxide.
Chalky white precipitate of lead hydroxide is a formed.
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Related Questions
Select the correct answer from A, B, C, D and E for each statement given below:
A: Hydrogen
B: Copper [II] oxide
C: Oxygen
D: Copper [II] hydroxide
E: Ammonia
The black residue obtained on heating copper carbonate.
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
The pale blue precipitate obtained when copper [II] sulphate reacts with sodium hydroxide.
The gas which reacts with oxygen to give a neutral liquid.
Give a word equation for each of the following reactions.
Two solids which combine on heating, to give a liquid.
Two gasses which combine to give a solid.
A compound which on heating shows – color change from brown to yellow.
A salt which reacts with ammonium hydroxide to give a reddish-brown precipitate.
An exothermic reaction where both the reactants are gases, one of which is oxygen.
Name the following:
The silvery residue obtained on heating mercury [II] oxide.
The gas evolved when dilute acid is added to chalk [limestone].
Two non-metal which react explosively when brought in close contact.
Two gases which react under pressure in presence of a catalyst at elevated temperatures to give a gaseous product.
A catalyst which increases the rate of a chemical reaction.
Give reasons for the following:
Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts are unnoticeable.
Electrolytic decomposition of water is a reaction involving a change of state.
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow [⇌] between reactants and products, formed in the chemical reaction.
Silver salts are kept in dark coloured bottles.