Advertisements
Advertisements
Question
The iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?
Options
It is more than 7 metres high.
It weighs about 6000 kg.
It was built more than 1600 years ago.
It has not rusted after such a long period.
Solution
It has not rusted after such a long period.
Explanation:
The iron pillar near Qutub Minar in Delhi is famous for its stability because it has not rusted over a long period.
APPEARS IN
RELATED QUESTIONS
Explain the terms Corrosion
State two conditions for the rusting of iron.
Fill in the following blank with suitable word:
The corrosion of iron is called ................
What is "rusting"? Describe with a labelled diagram an activity to investigate the conditions under which iron rusts.
Explain the term – rusting and give a word equation for the formation of rust. If polished iron nails are kept in three separate test tubes, state the contents in each test tube required, to prove the conditions for rusting.
Match the columns.
Group A | Group B |
1) Electroplating | a) Pressure cooker |
2) Anodising | b) Silver plated spoons |
c) Coating of tin on copper | |
d) Coating of Zinc on iron |
Write a molecular formula for rust.
State two conditions necessary for rusting of iron.
The diagram shows the reaction between metal and dil. acid.
What is the reason for different behaviour of Mg in test tube B?
Marble’s popularity began in ancient Rome and Greece, where white and off-white marble were used to construct a variety of structures, from hand-held sculptures to massive pillars and buildings.
The substance not likely to contain CaCO3 is: