Advertisements
Advertisements
प्रश्न
Rusting of an article made up of iron is called
विकल्प
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
Advertisements
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
The smallest unit of matter that exists freely in nature is called ...........
Name the processes involved in two cases.
Name the terms for the change of vapour into a liquid.
Give one difference between atoms and molecules.
Define the following term of Atom .
Explain why steel is used to make railway lines.
Which type of elements, metals or non-metals, show the property of brittleness ?
State two physical properties on the basis of which metals can be distinguished from non-metals.
“Is malleable and ductile” best describes :
The property/properties which enable copper metal to be used for making electric wires is/are :
Define solvent.
What is the effect of temperature on the solubility of solids in liquids ?
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
Why wires cannot be drawn from materials such as stone or wood?
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
The movement of particles in liquids is ______.
Examples of foam are ______.
Define the term matter.
Define the term matter.
