Advertisements
Advertisements
प्रश्न
Rusting of an article made up of iron is called
पर्याय
corrosion and it is a physical as well as chemical change
dissolution and it is a physical change
corrosion and it is a chemical change
dissolution and it is a chemical change
उत्तर
corrosion and it is a chemical change
Explanation:
Rusting of an article made up of iron is called corrosion. Corrosion is a chemical change because rust is a chemical compound (hydrated iron oxide, Fe2O3 - H2O) which is totally different from element iron (Fe).
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Liquids have a definite ______
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
What is meant by saying that metals are malleable and ductile ?
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
The elements which normally exist in the liquid state are :
The property/properties which enable copper metal to be used for making electric wires is/are :
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
Out of a colloid, solution and a suspension :
which one has the largest particles ?
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
Define Foam Give one example.
What is the effect of temperature on the solubility of solids in liquids ?
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
Write a few lines on the blackboard with a chalk. Now observe the chalk. What changes do you see in the chalk?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
Why wires cannot be drawn from materials such as stone or wood?
Which among the following is not a matter?
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
Atoms are tiny particles that repel each other when they are squeezed very close.
Evaporation does form bubbles.
