Advertisements
Advertisements
प्रश्न
Why are alloys made?
उत्तर
Pure metals generally do not have all the properties of a good metal, such as malleability, ductility, tensile strength, hardness, resistance to corrosion etc. Hence, alloys are made to enhance these properties. An alloy will have a better quality than the individual metals (or a non-metal) that form it.
APPEARS IN
संबंधित प्रश्न
Why are metals used for making cooking vessels?
Write the name and formulae of a non-metal hydride.
Name the non-metal which is used to make electrodes of dry cells.
Name a non-metal having a very high melting point.
Which of the following are amphoteric oxides:
MgO, ZnO, P2O3, Al2O3, NO2
Name the metal which is used in making thermometers.
State three reasons (of which at least one must be chemical) for believing that sodium is a metal.
Name a metal used in making electric cables
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is ______
Name a metal which can be cut with a knife :
State two important uses of following non-metal
Uses of chlorine
State two important uses of following non-metal
iodine
`M+ HCl → MCl_2 +—`
Name:
two metallic oxides which are acidic
Name a non-metal which shows reducing property.
Name a metal which does not corrode easily.
Differentiate between metals and non-metals with reference to –
(a) number of electrons in outer or valence shell
(b) formation of cation and anion
(c) reaction with dilute acids.
Brass : Aluminium and zinc : : Bronze : ______
Give two examples of alloy.
Which of the following non-metal is lustrous?
