Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

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p-Block Elements - I

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Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

Aluminium is a noble metal

Oxygen forms a protective oxide layer

Iron undergoes reaction easily with water

Iron forms mono and divalent ions

Solution

Corrosion resistance of aluminium is due to formation of thin layer of aluminium oxide that forms when metal is exposed to air and prevents further oxidation. It is called as protective passivation.

Standard 11

Chemistry

Below are two statements, one labeled as Assertion $(A)$ and the other as Reason $(R):$

Assertion $(A)$: Among group $13$ elements, boron's melting point is unusually high $(2453 \mathrm{~K})$.

Reason $(R):$ Solid boron has a strong crystalline lattice.

In the context of the above statements, choose the correct answer from the following options:

hard

(JEE MAIN-2024)

In the structure of borax, the numbers of boron atoms and $B – O – B$ units, respectively are

hard

(KVPY-2013)

When orthoboric acid $({H_3}B{O_3})$ is heated, the residue left is

easy

Anhydrous aluminium chloride fumes in moist air owing to the formation of

medium

Heating an aqueous solution of aluminium chloride to dryness will give

easy

(AIEEE-2005)

Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

Solution

Similar Questions

In the structure of borax, the numbers of boron atoms and $B – O – B$ units, respectively are

When orthoboric acid $({H_3}B{O_3})$ is heated, the residue left is

Anhydrous aluminium chloride fumes in moist air owing to the formation of

Heating an aqueous solution of aluminium chloride to dryness will give

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