Advertisements
Advertisements
प्रश्न
Is Decomposition of calcium carbonate an endothermic reaction or an exothermic reaction?
Advertisements
उत्तर
Decomposition of calcium carbonate: Endothermic reaction
Decomposition of calcium carbonate is an endothermic reaction because it needs energy to decompose into carbon dioxide and calcium oxide.
APPEARS IN
संबंधित प्रश्न
Complete and balance the following equation:
CA (OH)2 + ............. 
CaCO3 + H2O
Balance the given equation:
Mg(OH)2 + HCI MgCI + H2O
Balance the given chemical equation:
NH3 → N2 + H2
Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction.
Write the balanced equations for the following reaction, and add the state symbols:
Magnesium carbonate reacts with hydrochloric acid to produce magnesium chloride, carbon dioxide and water.
The chemical reaction between two substances is characterised by a change in colour from orange to green. These two substances are most likely to be:
(a) potassium dichromate solution and sulphur dioxide
(b) potassium permanganate solution and sulphur dioxide
(c) potassium permanganate solution and lemon juice
(d) potassium dichromate solution and carbon dioxide.
Balance the following equation. Also name the product formed.
K2O + H2O → KOH
Balance the following equation. Also name the product formed.
N2 + H2 → NH3
Balance the following equation. Also name the product formed.
PbCO3 → PbO +CO2
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
Balance the following equation:
Zn + KOH → K2ZnO2 + H2
Write the balanced chemical equation of the following reaction.
sodium chloride + manganese dioxide + sulphuric acid → sodium hydrogen sulphate + manganese sulphate + water + chlorine.
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of chlorine gas formed.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
2H2 + O2 → 2H2O
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
Name the following:
The gas evolved when a dilute acid is added to chalk [limestone].
Name the following:
Two non-metal which react explosively when brought in close contact.
Balance the following simple equation:
K + H2O → KOH + H2
Balance the following simple equation:
Fe2O3 + CO → Fe + CO2
Write a balanced equation for the following word equation:
Potassium bicarbonate → Potassium carbonate + Water + Carbon dioxide
