Give reasons for the following:
$(i)$ Gold and platinum are used in jewellery.
$(ii)$ Copper cannot displace hydrogen from dilute acids.
$(iii)$ Stainless steel does not rust easily.
$(iv)$ Metals can be given different shapes according to our needs.
$(v)$ Zinc does not give hydrogen gas on reacting with $HNO_3$.
$(i)$ Gold and platinum are used in jewellery.
$(ii)$ Copper cannot displace hydrogen from dilute acids.
$(iii)$ Stainless steel does not rust easily.
$(iv)$ Metals can be given different shapes according to our needs.
$(v)$ Zinc does not give hydrogen gas on reacting with $HNO_3$.
(N/A) $(i)$ Gold and platinum are noble metals that are highly lustrous and resistant to corrosion,making them ideal for jewellery.
$(ii)$ Copper is less reactive than hydrogen in the reactivity series,so it cannot displace hydrogen from dilute acids.
$(iii)$ Stainless steel is an alloy of iron with chromium and nickel,which forms a protective oxide layer that prevents rusting.
$(iv)$ Metals are malleable (can be beaten into sheets) and ductile (can be drawn into wires),allowing them to be shaped as required.
$(v)$ $HNO_3$ is a strong oxidizing agent. When it reacts with metals,it oxidizes the produced hydrogen gas $(H_2)$ into water $(H_2O)$ instead of releasing it.
$(ii)$ Copper is less reactive than hydrogen in the reactivity series,so it cannot displace hydrogen from dilute acids.
$(iii)$ Stainless steel is an alloy of iron with chromium and nickel,which forms a protective oxide layer that prevents rusting.
$(iv)$ Metals are malleable (can be beaten into sheets) and ductile (can be drawn into wires),allowing them to be shaped as required.
$(v)$ $HNO_3$ is a strong oxidizing agent. When it reacts with metals,it oxidizes the produced hydrogen gas $(H_2)$ into water $(H_2O)$ instead of releasing it.
Explore More
Similar Questions
An element $A$ forms two oxides $AO$ and $AO_2$. The oxide $AO$ is neutral,whereas the oxide $AO_2$ is acidic in nature. Would you call element $A$ a metal or a non-metal?
Medium
View SolutionGive reasons for the following:
$(a)$ Generally,metals are not found in their free state.
$(b)$ Metals are good conductors of heat.
$(a)$ Generally,metals are not found in their free state.
$(b)$ Metals are good conductors of heat.
Medium
View SolutionWrite chemical equations for the reactions taking place when:
$(i)$ iron is strongly heated in air.
$(ii)$ lead carbonate is calcined.
$(iii)$ chromium oxide $(Cr_{2}O_{3})$ is heated with aluminium powder.
$(i)$ iron is strongly heated in air.
$(ii)$ lead carbonate is calcined.
$(iii)$ chromium oxide $(Cr_{2}O_{3})$ is heated with aluminium powder.
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 Solution$2 \, mL$ each of concentrated $HCl$,$HNO_3$,and a mixture of concentrated $HCl$ and concentrated $HNO_3$ in the ratio of $3:1$ were taken in test tubes labeled as $A$,$B$,and $C$. $A$ small piece of metal was put in each test tube. No change occurred in test tubes $A$ and $B$,but the metal dissolved in test tube $C$. The metal could be:
Difficult
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