a) Although Aluminium is a reactive metal, it is used to make door frames and window frames.b) Although Aluminium conducts heat, it is used to make blankets, which are good thermal insulators.
a) Aluminium forms oxide on its surface thus protecting it. This protective oxides help the inner part being corroded / reacted . Its highly maliable and dectile property is also good. Thats why !!!!!!!! b) For making thermal insulators, i think, thin layers (maliability) of aluminium is using, where in between the layers the trapped air which is a poor thermal conductors, which gives the property.
a] AL is used to make frames because it is light, not costly and strong.
aluminum is cheap . easy to work with and good looking , because of this it is used to make door frames etc.
A) Because AL is light and durable, plus inexpensive and is a good insolator, it is used to make door frames and window frames. B) This one is self explanatory in the sentence.
