KEY CONCEPTSFORCHAPTER-8
REACTIVE METALS
( "mwfjyKvG,faom owåK)1.
Reactive metal
awGukd obm0rSm free awGY&ygov m;/Reactive metals are not found
(rawGY&) free in nature.2.
b, fv kdawGU&ov J/Reactive metals are found as compounds
("mwfaygif;uJhokdY)in nature.3.
b, fv dk extract (x kwfv kyf) ov J/Reactive metals are extracted by electrolysis.
(v QyfppfoHk; NzdKuGJapjci f;)
REACTIVE METALS1.
Alkali metals
awG[m bm group &JU member (t kyfpk0if) awGvJ/Alkali metals are Li, Na, K in group IA
(t kyfpk IA : Li, Na, K x J)2.
a&eJU x d&ifbmjzpfrv J/Alkali metals are easily inflammable
(t v G,fwul rD;av mifEkdifaom) when touch towater.
(a&eJUxd)3.
Reducing agent
("mwfav smhypönf;) v m;/ oxidizing agent (“"mwfwkd;ypönf;) v m;/Alkali metals are very good reducing agent.
(t v Gefaumif;wJh“"mwfav smhypönf;)4.
Zn, fe, Pb
wkdYukd b, fenf;eJY extract v kyfov J/Zn, fe are manufactured (extract) by reduction
("mwfav smhjci f;) reaction.5.
Reactivity series
&JU at mufqkH;ykdif;rSm½SdwJh metal awGukd obm0rSm free awGU&v m;/The metals at the lowest place
(at mufqkH;ykdif;) of reactivity series may be foundfree in nature.
(obm0rSm free awGU&)6.
Alkali metal
awG[m bm block element v J/Alkali metal
awG[m s. block element .7.
Reactivity series
rSmtx ufykdif;rSm½SdwJh metal awGeJUat mufykdif; rSm½SdwJh metal awGrSmb, fuextract
v kyfzkdYykdvG,fov J/t x ufykdif; (K,Na, Ca, Mg, Al-very reactive, Cu, Hg, Ag, Au- Not very reactive