$(i)$ Arrange the following metals in the order of their decreasing activities: Aluminium, Gold, Sodium, Copper.
$(ii)$ Give the reaction of aluminium powder with manganese dioxide on heating.
$(ii)$ Give the reaction of aluminium powder with manganese dioxide on heating.
(N/A) $(i)$ The order of decreasing reactivity is: Sodium > Aluminium > Copper > Gold.
$(ii)$ When aluminium powder is heated with manganese dioxide, a thermite reaction occurs, producing manganese metal and aluminium oxide: $4Al(s) + 3MnO_2(s) \xrightarrow{\Delta} 3Mn(l) + 2Al_2O_3(s) + \text{Heat}$.
$(ii)$ When aluminium powder is heated with manganese dioxide, a thermite reaction occurs, producing manganese metal and aluminium oxide: $4Al(s) + 3MnO_2(s) \xrightarrow{\Delta} 3Mn(l) + 2Al_2O_3(s) + \text{Heat}$.
Explore More
Similar Questions
Which of the following metals is a poor conductor of heat and electricity?
Easy
View SolutionGive the reactions involved during the extraction of zinc from its ore by:
$(a)$ Roasting of zinc ore
$(b)$ Calcination of zinc ore
$(a)$ Roasting of zinc ore
$(b)$ Calcination of zinc ore
Medium
View SolutionAn element $A$ burns with a golden yellow flame in air. It reacts with another element $B$ (atomic number $17$) to give a product $C$. An aqueous solution of product $C$ on electrolysis gives a compound $D$ and liberates hydrogen. Identify $A$,$B$,$C$,and $D$. Also,write down the equations for the reactions involved.
Difficult
View SolutionWhich metal is more reactive than magnesium $(Mg)$?
Easy
View Solution$(i)$ Name a metal which does not stick to glass.
$(ii)$ Name the metal which is commonly used in thermite welding.
$(iii)$ What is the nature of zinc oxide?
$(ii)$ Name the metal which is commonly used in thermite welding.
$(iii)$ What is the nature of zinc oxide?
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo