Home
Class 12
CHEMISTRY
Both iron and aluminium combine slowly w...

Both iron and aluminium combine slowly with oxygen at room temperature. Why is this reaction a problem for iron but not for aluminium?

Text Solution

Verified by Experts

Al forms as impervious coat of ` Al_2O_3 ` which protects the metal from furthere corrosion. In contrast, iron forms iron rust ` (Fe_2O_3.xH_2O)` which flakes off exposing fresh surface to corrosion.
Promotional Banner

Topper's Solved these Questions

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    PRADEEP|Exercise VALUE BASED QUESTIONS WITH ANSWERS|3 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    PRADEEP|Exercise COMPETITION FOCUS (JEE(Main and Advanced)/MEDICAL ENTRANCE SPECIAL) MULTIPLE CHOICE QUESTIONS (I)|56 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    PRADEEP|Exercise ADDITIONAL QUESTIONS (LONG ANSWER QUESTIONS)|1 Videos

  • ELECTROCHEMISTRY

    PRADEEP|Exercise IMPORTANT QUESTIONS FOR BOARD EXAMINATION|25 Videos

  • HALOALKANES AND HALOARENES

    PRADEEP|Exercise IMPORTANT QUESTIONS FOR BOARD EXAMINATION|22 Videos

Similar Questions

Explore conceptually related problems

Aluminium does not react with water at room temperature because

Sulphur is a solid while oxygen is a gas at room temperature. Why ?

Name one alloy each of iron and aluminium.

Elements hydrogen reacts with other substances only slowly at room temperature. Why?

Two rods, one of iron and the other of aluminium, are heated to the same temperature. Then,

Write the chemical formulae of the main ores of iron and aluminium.

Aluminium occurs in the combined state while gold does not. Why ?

when a mixture of aluminium powder and iron (III) oxide is ignited, it produces molten iron and aluminium oxide. In an experiment, 5.4gm of aluminium was mixed with 18.5 gm of iron oxide. At the end of the reaction, the mixture contained 11.2 gm of iron, 10.2 gm of aluminium oxide and an undetermined amount of unreacted iron (III) oxide. No aluminium was left. What is the mass of the iron (III) oxide left?