Question
Write short notes on the following: Galvanizing.
✓
Answer
(1) The process of coating a thin layer of zinc on iron or steel is called galvanization.
(2) In this method corrosion of zinc occurs first because zinc is more electropositive than iron. After a few years zinc layer goes away and the iron layer gets exposed and starts rusting.
(3) In galvanization an iron object is dipped into molten zinc. A thin layer of zinc is formed all over the iron object. Examples: Shiny iron nails, pin, iron pipes.
(2) In this method corrosion of zinc occurs first because zinc is more electropositive than iron. After a few years zinc layer goes away and the iron layer gets exposed and starts rusting.
(3) In galvanization an iron object is dipped into molten zinc. A thin layer of zinc is formed all over the iron object. Examples: Shiny iron nails, pin, iron pipes.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Name the four main stakeholders in the management of forest resources.
There are four tiny organisms A, B, C and D. The organism A is a parasitic protozoan which causes a disease known as kala-azar. The organism B is a microscopic single-celled animal which causes malaria disease in human beings. The organism C is a unicellular animal which can change its body shape according to need, it has no fixed shape. The organism D is also a unicellular animal which is slipper-shaped having a large number of tiny hair all around its body.
- Name the organisms A, B, C and D.
- Name one characteristic body feature of organism A.
- Name the insect which carries organism B and transmits it from one person to another.
- What name is given to the asexual method of reproduction of (i) organism A, and (ii) organism B?
- Where do organisms C and D live?
A p.d. of 4V is applied to two resistors of $6 Ω$ and $2 Ω$ connected in series. Calculate:
→- The combined resistance.
- The current flowing.
- The p.d. across the $6 Ω$ resistor.
Describe the human female reproductive system.
How does the short circuit form? What is its effect?
Give names of three functional groups containing three different heteroatoms. Write name and structural formula of one example each.
Why does menstruation occur? Describe the menstrual cycle in human females (or women).
Why is variation during reproduction beneficial to the species but not necessarily for the individual?
Observe the periodic table given below and write the answers of the questions.
- Write the name and valencies of the elements in 3rd row.
- Classify the elements in this row as metal, nonmetal and metalloids.
- Which block does nonmetals belong to?
- Write name of any two metalloid elements.
Which projects will you run in relation to environmental conservation? How?