Multiple choice question
Multiple choice question Multiple choice question
iz'u&25 Cyhfpax ikmMj fdls dgrs gSa\ bls cukus dh fof/k le>kb;s\ pwus ds ctk; pwus ds ikuh esa Cl 2 xSl izokfgr djus ij gksus okyh jklk;fud fØ;k Hkh n'kkZb;s\ What is bleaching powder? How is its prepated? Also give chemical reactions? When Cl 2 is passed in lime water rather than on slacked lime? iz'u&26 IykLVj vkWQ isfjl D;k gS\ bls izkIr djus dh fof/k dk jklk;fud lehdj.k nhft;s\ blds izeq[k mi;ksx Hkh fy[kks\ What is plaster of paris? Give chemical equation for obtaining it, also give some of its important uses? iz'u&27 LiCl ds xfyr voLFkk esa fo|qr foPNsnu djus gsrq KCl dk iz;ksx D;ks fd;k tkrk gS\ Why KCl is mixed while extracting Li from LiCl by electrolytic process in molten state? iz'u&28 xyu feJ.k D;k gksrk gS\ bldh vko';drk dgk¡ vkSj dc gksrh gS\ What is fusion mixture? When and where it is needed? iz'u&29 ladqy ;kSfxd cukus dh izo`fRr {kkj /kkrqvksa dh vis{kk {kkjh; e`nk /kkrq rRoksa esa vf/kd ik;s tkus dk dkj.k nhft;s\ Forming coordination compounds by alkaline earth metals is greater than alkali metals. Give its reason? iz'u&30 Li ds xq.k/keZ vxys lewg esa Be vkSj Mg esa ls fdlls feyus dh laHkkouk gS o D;ksa\ bu lekurkvksa dk Hkh mYys[k djsa\ Li in its properties should match with which element Be or Mg and why? Give also these similarities? 66
iz'u&31 f}rh; lewg ds rRoks dks {kkjh; e`nk /kkrq,sa D;ksa dgk x;k gS\ bu rRoksa dk bySDVªkWfud foU;kl n'kkZb;s\ Why second group elements are called alkaline earth metals? Give electronic configuration of these elements? iz'u&32 {kkjh; /kkrq rFkk {kkjh; e`nk /kkrqvksa dh rqyuk fuEufyf[kr fcUnqvksa ds vk/kkj ij dhft;s\ (a) vk;uu ÅtkZ (b) ok"i'khyrk (c) gkbMªksDlkbMksa dh foys;rk (d) vkWDlkbMksa dh {kkjh;rk (e) dkcksZusVksa dh foys;rk Compare alkali metals with alkaline earth metals on the basis of following points– (a) Ionization energy (b) Vapourization (c) Solubility of hydroxides (d) Basisity of oxides (e) Solubility of carbonates iz'u&33 {kkjh; e`nk /kkrqvksa ds f}rh; vk;uu foHko dk eku izFke vk;uu foHko ls vf/kd gS] fQj Hkh ;s /kkrq,sa $2 vkWDlhdj.k voLFkk n'kkZrh gS $1 ugh bldk dkj.k le>kb;s\ For Alkaline earth metals the value of second ionization potential is greater than Ist ionization even than these metals represent +2 oxidation number and not +1, why? iz'u&34 dkj.k crykb;s& (a) lksfM;e /kkrq dks feV~Vh ds rsy esa j[kuk iM+rk gS (b) pwuk HkV~Vh esa pwuk cukus gsrq rkiØe 1000°C ds uhps j[kk tkrk gS vf/kd ugha] D;ksa\ Give reason why– (a) Na metal is kept in kerosene oil (b) In lime kiln temperature is kept below 1000°C and not more. 67
- Page 15 and 16: The increasing order of size will b
- Page 17 and 18: 22 Li ,oa Mg rFkk Be vkSj Al ds xq.
- Page 19 and 20: iz'u&35 fdlh vkorZ esa rFkk lewg es
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- Page 25 and 26: iz'u&31 gkbMªkstu cU/k ds dkj.k ;k
- Page 27 and 28: 2 O rFkk H dk ?kuRo vuqikr 16:1 gS
- Page 29 and 30: Evaporation of water should come un
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- Page 37 and 38: fjDr fjDr fjDr LFkkuksa LFkkuksa dh
- Page 39 and 40: In measuring �U and �H for calc
- Page 41 and 42: If �H f ° = 3400 cal/mol, then c
- Page 43 and 44: cgqfodYih; cgqfodYih; iz'uA iz'uA b
- Page 45 and 46: 12 Kc dh bdkbZ gS& (a) ¼eksy izfr
- Page 47 and 48: 22 mRØe.kh; jklk;fud vfHkfØ;kvksa
- Page 49 and 50: Differentiate among concept of acid
- Page 51 and 52: In oxidation state there is- (a) Ga
- Page 53 and 54: In the froth floating process parti
- Page 55 and 56: iz'u&7 fo|qr jklk;fud lSy dk ukekaf
- Page 57 and 58: iz'u&19 xkayd fdl dgrs gS\ bldk pqu
- Page 59 and 60: 5 H 2 O, H 2 S, H 2 Se rFkk H 2 Te
- Page 61 and 62: Explain the structure of H 2 O 2 wi
- Page 63 and 64: (b) Na 2 SO 4 dh ty;kstu ÅtkZ tkyd
- Page 65: Give labelled diagram for soda amon
- Page 69 and 70: fjDr fjDr LFkkuks LFkkuks dh dh iwf
- Page 71 and 72: In any group atomic mass increase g
- Page 73 and 74: Describe electrolytic method for ge
- Page 75 and 76: In elements of group-14, on coming
- Page 77 and 78: 4 4 4 ,oa ,oa ,oa 5 5 5 vad vad oky
- Page 79 and 80: 2 ftu nzo inkFkksZ ds DoFkukad fHkU
- Page 81 and 82: 8 isij ØksesVksxzkQh }kjk jaxks dk
- Page 83 and 84: 16 dsfj;l uyh esa CH 2 ClCOOH dks l
- Page 85 and 86: 4 4 4 ,oa ,oa ,oa 5 5 5 vad vad oky
- Page 87 and 88: iz'u&43 fuEu dks izsj.k izHkko ds v
- Page 89 and 90: 4 C H O ds }kjk fdru izdkj ds vYdks
- Page 91 and 92: iz'u&14 esØksekWyhD;wy D;k gksrs g
- Page 93 and 94: (c) vkblksizhu ls ikWyhvkblksizhu (
- Page 95 and 96: Pollutants are said- (a) CO 2 , SO
- Page 97 and 98: 5 cgqydksa ds izdkjksa esa ls dkSu&
- Page 99: 18 FkSfyd ,flM dk jklk;fud lw= ----
iz'u&31 f}rh; lewg ds rRoks dks {kkjh; e`nk /kkrq,sa D;ksa dgk x;k gS\ bu rRoksa dk<br />
bySDVªkWfud foU;kl n'kkZb;s\<br />
Why second group elements are called alkaline earth metals? Give electronic<br />
configuration of these elements?<br />
iz'u&32 {kkjh; /kkrq rFkk {kkjh; e`nk /kkrqvksa dh rqyuk fuEufyf[kr fcUnqvksa ds vk/kkj<br />
ij dhft;s\<br />
(a) vk;uu ÅtkZ (b) ok"i'khyrk (c) gkbMªksDlkbMksa dh foys;rk<br />
(d) vkWDlkbMksa dh {kkjh;rk (e) dkcksZusVksa dh foys;rk<br />
Compare alkali metals with alkaline earth metals on the basis of following<br />
points–<br />
(a) Ionization energy (b) Vapourization (c) Solubility of hydroxides<br />
(d) Basisity of oxides (e) Solubility of carbonates<br />
iz'u&33 {kkjh; e`nk /kkrqvksa ds f}rh; vk;uu foHko dk eku izFke vk;uu foHko ls<br />
vf/kd gS] fQj Hkh ;s /kkrq,sa $2 vkWDlhdj.k voLFkk n'kkZrh gS $1 ugh bldk<br />
dkj.k le>kb;s\<br />
For Alkaline earth metals the value of second ionization potential is greater<br />
than Ist ionization even than these metals represent +2 oxidation number and<br />
not +1, why?<br />
iz'u&34 dkj.k crykb;s&<br />
(a) lksfM;e /kkrq dks feV~Vh ds rsy esa j[kuk iM+rk gS<br />
(b) pwuk HkV~Vh esa pwuk cukus gsrq rkiØe 1000°C ds uhps j[kk tkrk gS vf/kd<br />
ugha] D;ksa\<br />
Give reason why–<br />
(a) Na metal is kept in kerosene oil<br />
(b) In lime kiln temperature is kept below 1000°C and not more.<br />
67
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