1. alloys of which of the following metal are used for making aero planes and automobile engine.
a. copper, b. aluminium, c. iorn
​2. metals react with oxygen to form their oxides which are generally.
a. neutral in nature , b. acidic in nature, c. basic in nature
3. which of the following statement is incorrect
a. metals have lustue, b.metals are malleable c. metals are good conductors of electricity , d. metals are poor conductors of heat