11.22. Give reasons:
(i) Conc. HNO3 can be transported in aluminium container.
(ii) A mixture of dilute NaOH and aluminium pieces is used to open drain.
(iii) Graphite is used as lubricant.
(iv) Diamond is used as an abrasive.
(v) Aluminium alloys are used to make aircraft body.
(vi) Aluminium utensils should not be kept in water overnight.
(vii) Aluminium wire is used to make transmission cables.
11.22. Give reasons:
(i) Conc. HNO3 can be transported in aluminium container.
(ii) A mixture of dilute NaOH and aluminium pieces is used to open drain.
(iii) Graphite is used as lubricant.
(iv) Diamond is used as an abrasive.
(v) Aluminium alloys are used to make aircraft body.
(vi) Aluminium utensils should not be kept in water overnight.
(vii) Aluminium wire is used to make transmission cables.
(i) Al reacts with conc. HNO3 to form a very thin film of aluminium oxide on its surface which protects it from further reaction. That is why conc. HNO3 can be transported in aluminium container.
2Al (s) + 6HNO3 (conc.) → Al2O3 (s) + 6NO2 (g) + 3H2O (l)
(ii) NaOH reacts with Al to evolve H2 gas. Thu
Upvote 
Similar Questions for you
From BF3 to BI3 Lewis acidic strength increases
F2 is the strongest oxidising agent
HClO4 is the most acidic compound.
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else.
On Shiksha, get access to
Learn more about...
Didn't find the answer you were looking for?
Search from Shiksha's 1 lakh+ Topics
Ask Current Students, Alumni & our Experts
Have a question related to your career & education?
See what others like you are asking & answering