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प्रश्न
Consider the following chemical equation I and II
- \[\ce{Mg + 2HCl -> MgCl_2 +H_2}\]
- \[\ce{NaOH +HCl -> NaCl + H_2O}\]
The correct statement about these equations is:
पर्याय
'I' is a displacement reaction and 'II' is a decomposition reaction.
'I' is a displacement reaction and 'II' is double displacement reaction.
Both 'I' and 'II' are displacement reactions.
Both 'I' and 'II' are double- displacement reactions.
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उत्तर
'I' is a displacement reaction and 'II' is double displacement reaction.
Explanation:
\[\ce{Mg(s) + 2HCl(aq) ->MgCl_2(aq) + H_2(g)}\]
Magnesium displaces hydrogen in a chloride molecule in a single displacement reaction because it is more reactive than hydrogen.
\[\ce{NaOH(aq) + HCl(aq) -> NaCl(aq) + H_2O(l)}\]
The reactants in a double displacement reaction exchange ions to create new molecules. The formation of salt (NaCl) and water (HOH) in the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is an example of a double displacement reaction, more precisely a neutralisation reaction.
संबंधित प्रश्न
The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is
- Cu2O
- Cu
- CuO
- CuS
\[\ce{Fe2O3 + 2Al -> Al2O3 + 2Fe}\]
The above reaction is an example of a ______.
State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.
Fill in the blank.
The chemical change involving iron and hydrochloric acid illustrates a ...............reaction.
What is observed after about 1 hour of adding the strips of copper and aluminium separately to the ferrous sulphate solution filled in two beakers? Name the reaction if any change in colour is noticed. Also, write a chemical equation for the reaction.
Classify the following reaction into different type:
AgNO3(aq) + NaCl(aq) →AgCl(s) + NaNO3(aq)
Give reasons for the following:
The reaction of iron (III) oxide [Fe2O3] with heated aluminum is used to join cracked machine parts.
Which of the following is a displacement reaction?
State the change in colour observed in following case mentioning the reason:
A piece of zinc is dipped in ferrous sulphate solution.
The colour of the solution observed after 30 minutes of placing zinc metal in copper sulphate solution is ______.
