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प्रश्न
Give one example each of which illustrates the following characteristics of a chemical reaction:
evolution of a gas
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उत्तर
When Zinc reacts with dil. sulphuric acid. Hydrogen gas is evolved, with an effervescence
\[\ce{\underset{\text{zinc}}{Zn} +\underset{\text{dil.suphuric acid}}{H2SO4} -> \underset{\text{zinc sulphate}}{ZnSO4} + \underset{\text{hydrogen}}{H2}}\]
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संबंधित प्रश्न
What do you observe when a few pieces of iron are dropped in a blue solution of copper sulphate?
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With reference to Acid explain with a suitable example of how the reactivity of the metals could be differentiated.
Select the correct answer for the statement given below:
A neutral oxide which does not react with an acid or a base to give salt and water.
Complete the statement by filling in the blank with the correct word:
The metal which reacts with steam and the reaction is reversible is ________.
Explain the following reaction with the balanced equation.
Sulphur burns in air
Which of the following is the correct arrangement of the given metals in ascending order of their reactivity?
Zinc, Iron, Magnesium, Sodium
A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCl and NaOH.
A metal that exists as a liquid at room temperature is obtained by heating its sulphide in the presence of air. Identify the metal and its ore and give the reaction involved.
An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with water gives back B. Identify A, B and C and give the reactions involved.
