Multiple choice question

f–block elements have been known as lanthanides and actinides. Give general
characteristics of these elements along with their general electronic
configuration?
iz'u&29 laØe.k rRo fdUgsa dgrs gSa\ buds lkekU; xq.k n'kkZb;s\ vUr% laØe.k rRoksa
dks le>kb;s\
What are transitional elements? Give their general characteristics? Explain
inner transitional elements?
iz'u&30 ok.MjokYl f=T;k ,oa lgla;kstd f=T;k fdUgsa dgk tkrk gS\ fp= dh
lgk;rk ls Li"V dhft;s\
What are Vander walls and co-valent radius? Explain with the help of diagrams?
iz'u&31 vfØ; xSl f=T;k ,oa vk;fud f=T;k fdUgsa dgk tkrk gS\ /kuk;u rFkk
_.kk;u f=T;kvksa ds mnkgj.k ysdj Li"V dhft;s\ leku /ku vkos'k ,oa
_.k vkos'k dh f=T;kvksa esa D;k laca/k gksuk pkfg;s\ Li"V djsaA
What are inert gas radius and ionic radius? Explain giving examples of (+)ion
and (–)ion? What should be the relation between (+)ve and (–)ve of the uniform
charge?
iz'u&32 vk;uu ÅtkZ vFkok vk;uu ,UFkSYih dks ifjHkkf"kr dhft;s\
Define ionization energy or ionization enthalpy?
iz'u&33 bySDVªku cU/kqrk dks ifjHkkf"kr dhft;s\ bldh bdkbZ D;k gS\
Define electron affinity. What is its unit?
iz'u&34 me; /kehZ vkWDlkbM~l dkSu ls gksrs gSa\ fdUgha nks mnkgj.kksa ds ek/;e ls Li"V
djsaA
What are emphoteric oxides? Explain with the help of any two suitable
examples
18