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प्रश्न
Balance the following chemical equation:
\[\ce{FeSO4 ->[Heat] Fe2O3 + SO2 + SO3}\]
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उत्तर
\[\ce{2FeSO4 ->[Heat][Decomposition] Fe2O3 + SO2 + SO3}\]
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संबंधित प्रश्न
Give one example of a chemical reaction characterised by a change in state.
An acid which can decolourise purple coloured potassium permanganate solution is ______.
A colourless lead salt, when heated, produces a yellow residue and brown fumes.
(a) Name the lead salt.
(b) Name the brown fumes.
(c) Write a chemical equation of the reaction involved.
Write word equation for the following skeletal equation:
\[\ce{KClO3 -> KCl + O2}\]
Write word equation for the following skeletal equation:
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Write symbolic representation for the following word equation and balance them :
Calcium oxide + Water → Calcium hydroxide
In electrolysis of water, why is the volume of gas collected over one electrode double that of gas collected over the other electrode?
Balance the following equation:
PbS + O2 → PbO + SO2
Write the balanced chemical equation of the following reaction. potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water
Write the balanced chemical equation of the following reaction.
barium chloride + sulphuric acid → barium sulphate + hydrochloric acid
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of acid required.
Name the following:
Two gases which react under pressure in presence of a catalyst at elevated temperatures to give a gaseous product.
Give an example of a chemical equation in which two reactants form:
three product
Balance the following simple equation:
Mg + CO2 → MgO + C
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
NaOH + CO2 → Na2CO3 + H2O
Match the columns.
| Reactants | Products | Types of chemical reaction | ||
| 1. | MgH2 | → | Mg + H2 | Endothermic |
| 2. | 2H2S + SO2 | → | 3S + 2H2O | Oxidation |
| 3. | CaO + H2O | → | Ca(OH)2 + heat | Exothermic |
| Redox | ||||
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Write names of reactants and products of chemical reaction.
Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is(are) correct?
- In beakers A and B, exothermic process has occurred.
- In beakers A and B, endothermic process has occurred.
- In beaker C exothermic process has occurred.
- In beaker C endothermic process has occurred.
A dilute ferrous sulphate solution is gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
When aqueous solutions of potassium iodide and lead nitrate are mixed an insoluble substance separates out. The chemical equation for the reaction involved is:
