Question
Write a short note on alloying.

Answer

i. The homogenous mixture formed by mixing a metal with other metals or nonmetals in certain proportion is called an alloy.
ii. Majority of the metallic substances used presently are in the form of alloys. The main intention behind this is to decrease the intensity of corrosion of metals.
iii. For example, bronze is an alloy formed from $90 \%$ copper and $10 \% tin$. Bronze statues do not get affected by sun and rain. Stainless steel does not get stains with air or water and also does not rust. It is an alloy made from $74 \%$ iron, $18 \%$ chromium and $8 \%$ carbon.
iv. In recent times, various types of alloys are used for minting coins.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

State Joule’s law about heating effect of electric current.
{:[" Speed of light in the "],[" first medium "(v_(1))]:} {:[" Speed of light in the "],[" second medium "(v_(2))]:} Refractive index _(2)n_(1) Refractive index _(2)n_(1)
3x10^(8)m//s 1.2 x10^(8)m//s -
2.25 x10^(8)m//s 4//3
2x10^(8)m//s 1.5
Find the heat needed to raise the temperature of a silver container of mass 100 g by 10 °C. (c = 0.056 cal/g.°C)
A small object is placed 150mm away from a diverging lens of focal length 100mm:
  1. Copy the figure below and draw rays to show how an image is formed by the lens.
  1. Calculate the distance of the image from the lens by using the lens formula.
A domestic lighting circuit has a fuse of 5A. If the mains supply is at 230V, calculate the maximum number of 36W tube-lights that can be safely used in this circuit.
Observe the figure 1.5 of translation and translocation, given on page 9 this chapter and answer the following questions:
Image

(1) Which is the initiation codon? Where is it present?
(2) What are the types of RNA present inside the ribosome? Which triplet codon is present on it?
(3) Which genetic code is present on mRNA that is leaving the nucleus? What must be the sequence on the DNA to have such code on mRNA?
What is meant by dental caries? How are they caused?
Why is biogas considered an ideal fuel for domestic use?
The electronic configurations of three elements A, B and C are as follows:
A 2, 8, 1
B 2, 8, 7
C 2, 4
  1. Which of these elements is a metal?
  2. Which of these elements are non-metals?
  3. Which two elements will combine to form an ionic bond?
  4. Which two elements will combine to form a covalent bond?
  5. Which element will form an anion of valency 1?
Find the position and size of the virtual image formed when an object $2$cm tall is placed $20$cm from:
  1. A diverging lens of focal length $40$cm.
  2. A converging lens of focal length $40$cm.