A) 3 part metal oxide\[+1\] part \[Al\] is taken as thermite mixture
B) Ignition mixture (\[Mg\] powder \[+Ba{{O}_{2}}\]) acts as catalyst
C) Metals \[(Fe,Cr)\] are obtained in vapour form
D) Reaction is exothermic due to highly \[+ve\]enthalpy of formation of \[A{{l}_{2}}{{O}_{3}}\]
Correct Answer: A
Solution :
(Mg powder s \[+Ba{{O}_{2}}\]) acts as ignition mixture\[Fe,\text{ }Cr\] are obtained in molten state Enthalpy of formation of \[A{{l}_{2}}{{O}_{3}}\] is negative.
You need to login to perform this action.
You will be redirected in
3 sec
