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प्रश्न
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 | ||||
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उत्तर
| Reactants | Products | Types of chemical reaction | ||
| 1. | MgH2 | → | Mg + H2 | Oxidation |
| 2. | 2H2S + SO2 | → | 3S + 2H2O | Redox |
| 3. | CaO + H2O | → | Ca(OH)2 + heat | Exothermic |
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संबंधित प्रश्न
With the help of an appropriate example, justify that some of the chemical reactions are determined by a change in colour.
Give a chemical equation for the reaction involved in the above case.
Give one example of a chemical reaction characterised by a change in state.
State one characteristic of the chemical reaction which takes place when wax is burned in the form of a candle.
You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of ______.
Name the type of chemical reaction shown by the following equation:
2Mg+ O2 → 2MgO
Write word equation for the following skeletal equation:
\[\ce{Na + O2 -> Na2O}\]
Write symbolic representation for the following word equation and balance them :
Carbon + Oxygen → Carbon dioxide.
Balance the following equation. Also name the product formed.
` "H"_2"O"_2 → "H" _2 "O" + "O"_2`
Balance the following equation. Also name the product formed.
N2 + H2 → NH3
Write your observation and name the product when An aqueous solution of barium chloride is added to dilute sulphuric acid.
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
Show the formation of Na2O by the transfer of electrons.
Write the chemical equation for the following word equation and balance them.
Carbon + Oxygen → Carbon dioxide
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.
\[\ce{C +2S -> CS2}\]
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Iron [III] chloride to ammonium hydroxide.
Give an example of a chemical equation in which two reactants form:
one product
Balance the following simple equation:
CaO + HCl → CaCl2 + H2O
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
Fe2O3 + 2H2 → 2Fe + 3H2O
Reema took 5ml of Lead Nitrate solution in a beaker and added approximately 4ml of Potassium Iodide solution to it. What would she observe?
