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प्रश्न
Write word equation for the following skeletal equation:
\[\ce{Ca + O2 → CaO}\]
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उत्तर
\[\ce{Calcium + Oxygen → Calcium oxide}\]
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संबंधित प्रश्न
Balance the following equation:
\[\ce{Fe + O2 -> Fe2O3}\]
Chemical equations are balanced to satisfy the law of ______.
Giving examples, state the difference between balanced and unbalanced chemical equations.
When metal X is treated with a dilute acid Y, then a gas Z is evolved which burns readily by making a little explosion.
- Name any two metals which can behave like metal X.
- Name any two acids which can behave like acid Y.
- Name the gas Z.
- Is the gas Z lighter than or heavier than air?
- Is the reaction between metal X and dilute acid Y exothermic or endothermic?
- By taking a specific example of metal X and dilute acid Y, write a balanced chemical equation for the reaction which takes place. Also indicate physical states of all the reactants and products.
While performing the experiment with raisins to determine the percentage of water absorbed by them, a student made following measurements:
Mass of water in the beaker = 40 g
Mass of raisins before soaking = 5 g
Mass of raisins after soaking for 2 hours = 8 g
Mass of water left in the beaker after the experiment = 35 g
The percentage of water absorbed by raisins is:
A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – copper carbonate.
Give an example of a chemical equation in which two reactants form:
two product
Balance the following simple equation:
Al + O2 → Al2O3
Balance the following simple equation:
Fe2O3 + H2 → Fe + H2O
In the chemical equation the _______ are written on the left-hand side.
