Multiple choice question

iz'u&14 vko';drkuqlkj H + vFkok H O tksM+dj fuEufyf[kr lehdj.kksa dks larqfyr
2
¼vk;u bySDVªku fof/k }kjk½ dhft;s\
i) Fe2+ – 3+ –
+ ClO Fe + Cl 3
ii) Fe2+ – 3+ + NO Fe + NO
3
– 2+ 3+ 3+
iii) Cr O + Fe Cr + Fe 2 7
Balance the above equations by ion electron method, add H + or H 2 O as per
requirements?
iz'u&15 [fut fdUgsa dgrs gSa ;s v;Ld ls fdl izdkj fHkUu gksaxs\ iz—fr esa ikls tkus
okys v;Ldksa ds jklk;fud la?kVu ds vk/kkj ij budk oxhZdj.k dhft;s\
What are minerals how they differ from ores? Classify them on the basis of
their constitution found in nature?
iz'u&16 thoksa ds fy;s Hkkstu ds :i esa egRoiw.kZ rRoksa dh lwph nhft;s\ bu rRoks dh
iwfrZ ;s tho fdl izdkj vius Hkkstu ds ek/;e ls djrs gSa\
Give a list of elements which are important for living being and present in
their food? How these elements are supplied to the body of living beings
through food?
iz'u&17 v;Ldksa ds lkUnz.k dh lkekU; fof/k;k¡ D;k gSa \ D;k ;s lHkh fof/k;k¡ lHkh
/kkrqdehZ; izØeksa ds fy;s leku :i ls ykxw gksrh gS\ ;fn ugha rks budk
pquko fdl vk/kkj ij fd;k tkrk gS\
What are the general methods of concentration of ores? Are all these methods
uniformly applied for all the metalurgical process? If not then on what grounds
they are selected?
iz'u&18 HktZu fØ;k esa iz;qDr ijkorZuh HkV~Vh dk LoPN ukekafdr fp= rFkk blesa gksus
okyh jklk;fud vfHkfØ;k,sa n'kkZvks\
For Roasting of ore give labelled diagram of reververatory furnace, also give
reaction that take place in the process of roasting in this furnace?
56