Steel is an alloy of iron and…….
a) carbon
b) copper
c) silicon
d) tin
Brass is an alloy of copper and ……..
a) carbon
b) zinc
c) silicon
d) tin
Bronze is an alloy of copper and ……..
a) carbon
b) zinc
c) silicon
d) tin
Explanation:An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, opacity, and luster, but may have properties that differ from those of the pure metals, such as increased strength or hardness.
Why many pots and pans are made of steel instead of pure iron? Because pure iron is……
a) soft and flexible
b) hard
c) high melting and boiling point
d) none of these
Why steel is used to make kettles and frying pans?
a) steel has high melting and boiling point
b) it does not corrode
c) it is poor conductor of heat
d) both a and b
Which of the following is/are used in jewelry?
a) gold
b) silver
c) iron
d) both a and b
