Multiple choice question
Multiple choice question Multiple choice question
Give chemical equation for the reaction of Na 2 CO 3 on calcium borate (Ca 2 B 6 O 11 ). Also give structure of ortho boric acid having hydrogen bonds. iz'u&21 MkbZ cksjsu dh lajpuk fp= dh lgk;rk ls n'kkZb;s rFkk bldh ryh; iz—fr vkSj dks.kh; fLFkfr crykb;s\ ;g fdl Js.kh dk lnL; gS\ Give structure of di borane and mention its dimensional nature and angular position? To which series of boranes it belongs? iz'u&22 MkbZ gSykbM ds :i esa cksjkWu ds fdlh ;kSfxd dh laHkkfor lajpuk,sa n'kkZb;s\ Give possible structures of dihalids of boron? iz'u&23 ,Y;wehfu;e /kkrq ds fuEu v;Ldksa ds ,d&,d mnkgj.k lw= lfgr fyf[k;s& (a) vkWDlkbM (b) flyhdsV (c) lYQsV (d) QkWLQsV (e) gSykbM ¼¶yksjkbM½ Give one example with its formula for the following aluminium ores– (a) Oxides (b) Silicates (c) Sulphates (d) Phosphates (e) Halides (Florides) iz'u&24 ckWDlkbV dk 'kks/ku fdu&fdu fof/k;ksa ls fd;k tkrk gS\ bl v;Ld esa D;k&D;k v'kqf);k¡ laHkkfor gSa bu v'kqf);ksa dh mifLFkfe ds vk/kkj ij pquh x;h fof/k dk laf{kIr o.kZu rFkk blesa gksus okyh jklk;fud vfHkfØ;kvksa ds lehdj.k nhft;s\ Which methods are applicable for purification of Boxite? What type of impurities may be present in it? On the basis of the impurity present choose and describe the method in brief, also give chemical reactions that take place in the process? iz'u&25 'kq) ,Y;wehuk ls ,Y;wehfu;e /kkrq izkIr djus dh oS|qr vi?kVu fof/k dk LoPN ukekafdr fp= rFkk jklk;fud vfHkfØ;k,sa nhft;s\ ,Y;wehuk esa Øk;ksykbV (Na 3 AlF 6 ) vkSj ¶yksjLikj (CaF 2 ) D;ksa feyk;k tkrk gS\ 72
Describe electrolytic method for getting Al metal from Alumina with the help of a diagram? Give chemical equations also? Why Floarspar (CaF 2 ) and cryolyte (Na 3 AlF 6 ) are mixed with alumina? iz'u&26 gwi dh fof/k ls ,Y;wehfu;e /kkrq ds 'kks/ku dks fp= dh lgk;rk ls le>kb;s\ bl fof/k ls izkIr /kkrq fdl Lrj dh 'kq)rk okyh gksrh gS\ With the help of a diagram describe purification of Al metal by hoop’s method? Metal thus obtained is of which quality so far as purity is concerned? iz'u&27 FkekZbV oSfYMax D;k gS\ bls fp= ,oa jklk;fud fØ;k dh lgk;rk ls Li"V djks\ What is Thermite belding? Explain with the help of a diagram and chemical reaction that take place? iz'u&28 futZy ,Y;wehfu;e DyksjkbM cukus dh dksbZ nks fof/k;k¡ lehdj.k lfgr nhft;s\ bldh fuEu ds lkFk jklk;fud fØ;kvksa ds lehdj.k n'kkZb;s\ dksbZ nks mi;ksx Hkh fyf[k;s\ (a) tyh; foy; esa ty vi?kVu ls izkIr foy;u dh iz—fr (b) veksfu;k¡ ds lkFk fØ;k (c) NaOH ls fØ;k Give any two methods for preperation of anhydrous AlCl 3 long with chemical equation? Give equations for the reaction with the following also give any two uses of it? (a) Nature of solution produced on hydrolysis (b) Reaction with NH 3 73 (c) Reaction with NaOH iz'u&29 ,Y;wehfu;e ds f}d yo.k dk dksbZ mnkgj.k nhft;s\ ,ye fdls dgk tkrk gS] bldk lkekU; lw= fy[kks\ Nn~e ,ye fdUgsa dgsaxs\ Give any example of a double salt of Aluminium. What are alums give their general formula? What are pseudo alums?
- Page 21 and 22: c
- Page 23 and 24: 19 vk/kqfud vkorZ lkfj.kh fuEu esa
- 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
- Page 31 and 32: iz'u&27 ,oksxsMªks fu;e dks ifjHkk
- Page 33 and 34: iz'u&42 ije 'kwU;] ije rki ,oa NTP
- Page 35 and 36: 8 mRØe.kh; vfHkfØ;k ds fy;s lkE;
- 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 and 66: Give labelled diagram for soda amon
- Page 67 and 68: iz'u&31 f}rh; lewg ds rRoks dks {kk
- Page 69 and 70: fjDr fjDr LFkkuks LFkkuks dh dh iwf
- Page 71: In any group atomic mass increase g
- 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= ----
Give chemical equation for the reaction of Na 2 CO 3 on calcium borate<br />
(Ca 2 B 6 O 11 ). Also give structure of ortho boric acid having hydrogen bonds.<br />
iz'u&21 MkbZ cksjsu dh lajpuk fp= dh lgk;rk ls n'kkZb;s rFkk bldh ryh; iz—fr<br />
vkSj dks.kh; fLFkfr crykb;s\ ;g fdl Js.kh dk lnL; gS\<br />
Give structure of di borane and mention its dimensional nature and angular<br />
position? To which series of boranes it belongs?<br />
iz'u&22 MkbZ gSykbM ds :i esa cksjkWu ds fdlh ;kSfxd dh laHkkfor lajpuk,sa n'kkZb;s\<br />
Give possible structures of dihalids of boron?<br />
iz'u&23 ,Y;wehfu;e /kkrq ds fuEu v;Ldksa ds ,d&,d mnkgj.k lw= lfgr fyf[k;s&<br />
(a) vkWDlkbM (b) flyhdsV (c) lYQsV<br />
(d) QkWLQsV (e) gSykbM ¼¶yksjkbM½<br />
Give one example with its formula for the following aluminium ores–<br />
(a) Oxides (b) Silicates (c) Sulphates<br />
(d) Phosphates (e) Halides (Florides)<br />
iz'u&24 ckWDlkbV dk 'kks/ku fdu&fdu fof/k;ksa ls fd;k tkrk gS\ bl v;Ld esa<br />
D;k&D;k v'kqf);k¡ laHkkfor gSa bu v'kqf);ksa dh mifLFkfe ds vk/kkj ij pquh<br />
x;h fof/k dk laf{kIr o.kZu rFkk blesa gksus okyh jklk;fud vfHkfØ;kvksa ds<br />
lehdj.k nhft;s\<br />
Which methods are applicable for purification of Boxite? What type of<br />
impurities may be present in it? On the basis of the impurity present choose<br />
and describe the method in brief, also give chemical reactions that take place<br />
in the process?<br />
iz'u&25 'kq) ,Y;wehuk ls ,Y;wehfu;e /kkrq izkIr djus dh oS|qr vi?kVu fof/k dk<br />
LoPN ukekafdr fp= rFkk jklk;fud vfHkfØ;k,sa nhft;s\ ,Y;wehuk esa Øk;ksykbV<br />
(Na 3 AlF 6 ) vkSj ¶yksjLikj (CaF 2 ) D;ksa feyk;k tkrk gS\<br />
72
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