Question

Which of the following does not react with sulphuric acid in any condition? *

Zinc

Platinum

Magnesium

Iron

​

Answer 1

$\Large{\underline{\underline{\red{\tt{\purple{\leadsto } SolutioN:-}}}}}$

The given metals to us are ,

• Zinc ( Zn)
• Platinum ( Pt )
• Magnesium ( Mg )
• Iron ( Fe )

Among the given metals the metal which does not react with Sulphuric acid ( $\sf H_2SO_4$) is Platinum .

This is so because all the other three elements Zinc , Magnesium and Iron are placed at a higher level than Hydrogen in reactivity series . So these metals have the ability to displace hydrogen .

Whereas Platinum is located below hydrogen in the activity series so it would not react with sulphuric acid under any case. Also platinum is a noble metal.

_______________________________________

$\Large{\underline{\underline{\red{\tt{\purple{\leadsto } ExtrA\:\: InformatioN:-}}}}}$

$\bf \green{\purple{\bullet} \:\: Combination\: Reaction} :-$

A reaction in which two or more reactants combine to form a single product is known as combination reaction.

$\boxed{\purple{\tt{\dag \underset{\orange{Nitrogen}}{N_2}+\underset{\orange{Oxygen}}{O_2}\longrightarrow \underset{\orange{Nitricoxide}}{2NO}}}}$

$\boxed{\purple{\tt{\dag \underset{\orange{Ammonia}}{NH_3}+\underset{\orange{Water}}{H_2O}\longrightarrow \underset{\orange{Ammonium\: hydroxide}}{NH_4OH}}}}$

$\bf \green{ \purple{\bullet} \:\: Decomposition\: Reaction} :-$

A reaction in which of single product breaks down to form two or more simpler substances or products is known as decomposition reaction . This is further divided into :

• $\tt Chemical\: Decomposition$
• $\tt Photolytic \:Decomposition$
• $\tt Electrolytic\: Decomposition$
• $\tt Thermal\: Decomposition$

$\boxed{\purple{\tt{\dag \underset{\orange{Sodium\:nitrate}}{NaNO_3} \overset{\Delta}{\longrightarrow}\underset{\orange{Sodium\:nitrite}}{NaNO_2}+ \underset{\orange{Oxygen}}{O_2}}}}$

$\boxed{\purple{\tt{\dag \underset{\orange{Water}}{H_2O} \xrightarrow{\red{Electrolytic\: Decomposition}}\underset{\orange{Hydrogen}}{2H_2}+ \underset{\orange{Oxygen}}{O_2}}}}$

$\bf \green{\purple{\bullet} \:\: Displacement\: Reaction} :-$

A reaction in which a more reactive metal metal from its salt solution is known as displacement reaction. Elements placed at higher level in the reactivity series can displace elements placed below them .

$\boxed{\purple{\tt{\dag\underset{\orange{ Copper\: Sulphate}}{CuSO_4}+\underset{\orange{ Iron}}{Fe}\longrightarrow\underset{\orange{ Ferrous\: Sulphate}}{FeSO_4} +\underset{\orange{ Copper}}{Cu} }}}$

$\boxed{\purple{\tt{\dag\underset{\orange{ Pottasium\: chloride}}{2KCl}+\underset{\orange{ Fluorine}}{F_2}\longrightarrow\underset{\orange{ Pottasium\: Fluoride}}{2KF} +\underset{\orange{ Chlorine}}{Cl_2} }}}$

$\bf \green{ \purple{\bullet} \:\: Double\: Displacement\:\: Reaction} :-$

A reaction in which the radicals of reactants are interchanged. A double decomposition or a double displacement reaction between acid and base is called neutralization reaction. precipitation reaction also double displacement reaction.

$\boxed{\purple{\tt{\dag\underset{\orange{ Sodium\: Sulphate}}{Na_2SO_4}+\underset{\orange{ Zinc\:nitrate}}{Zn(NO_3)_2}\longrightarrow\underset{\orange{Sodium\:nitrate }}{2NaNO_3} +\underset{\orange{Zinc\: sulphate }}{ZnSO_4} }}}$

$\boxed{\purple{\tt{\dag\underset{\orange{Pottasium\: hydroxide }}{2KOH}+\underset{\orange{Sulphuric\:Acid }}{H_2SO_4}\longrightarrow\underset{\orange{ Pottasium\: Sulphate}}{K_2SO_4} +\underset{\orange{ Water}}{2H_2O} }}}$

Answer 2

Answer:

Platinum

Explanation:

Among the given metals the metal which does not react with Sulphuric acid ( ) is Platinum . This is so because all the other three elements Zinc , Magnesium and Iron are placed at a higher level than Hydrogen in reactivity series .