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cgqfodYih; cgqfodYih; iz'uA iz'uA bdkbZ&11 bdkbZ&11 ¼p-CykWd CykWd rRo rRo &A&lewg &A&lewg 13 13 ds ds rRo½ rRo½ (Elements of p–block) cgqfodYih; iz'uA Multiple choice question 1 1 vad vad okys okys okys iz'u iz'u 1 cksfjd vEy gksrk gS& (a) ,d Hkkf"ed vEy (b) cksjkWu gSykbM ds ty vi?kVu ls izkIr inkFkZ (c) f=Hkkf"ed vEy (d) leryh; vk—fr okyk inkFkZ Boric acid is– (a) Mono basic acid (b) Substance obtained by hydrolysis of boron halide (c) Tri Basic acid (d) Substance of linear or planer structure 2 B 2 H 6 ls dkSu&lk inkFkZ ugh cuk;k tk ldrk& (a) H 3 BO 3 (b) B 2 (CH 3 ) 4 H 2 (c) B 2 (CH 3 ) 6 (d) NaBH 4 Which one is not obtained from B 2 H 6 – (a) H 3 BO 3 (b) B 2 (CH 3 ) 4 H 2 (c) B 2 (CH 3 ) 6 (d) NaBH 4 3 cksjSDl dk tyh; foy;u gksxk& (a) vEyh; (b) {kkjh; (c) mnklhu (d) vHk;/kehZ Water solution of Borex will be– (a) Acidic (b) Basic (c) Neutral (d) Emphoteric 4 cksfjd vEy ds cgqyh—r gksus dk dkj.k gS& (a) vEyh; iz—fr (b) H– ca/k (c) vEy dh T;kferh; lajpuk (d) ,d Hkkf"ed iz—fr Reason for polymerization of Boric Acid is– (a) Acidic nature (b) H– Bond (c) Geometrical structure (d) Monobasic nature 68
fjDr fjDr LFkkuks LFkkuks dh dh iwfrZ iwfrZ dhft;sA dhft;sA fjDr LFkkuks dh iwfrZ dhft;sA Fill in the blanks 5 tc Qkjfed vEy dks lkUnz H SO ds lkFk xeZ fd;k tkrk gS rks ------------- 2 4 curk gSA When formic acid is heated with concentrated H 2 SO 4 then it forms .............. 6 QSfjd vkWDlkbM dh v'kqf) okys ckDlkbV ds 'kks/ku gsrq ------------ fof/k dk iz;ksx fd;k tkrk gS\ Boxite having impurities of ferric oxide is purified by the ........... method? 7 tc ,Y;wehuk esa Fe O ,oa SiO nksuks izdkj dh v'kqf);k¡ mifLFkr jgrs gSa rc 2 3 2 bldk 'kks/ku -------------------- dh fof/k }kjk fd;k tkrk gS& When Fe 2 O 3 and SiO 2 both are present in Alumina as impurities then ................ method is applied for its purification? 8 'kr~ izfr'kr 'kq) ,Y;wehfu;e izkIr djus gsrq ,Y;wehfu;e dk 'kks/ku --------fof/k }kjk fd;k tkrk gSA For getting 100 percent pure aluminium metal purification is done by ........ method? 9 'kq) ,Y;wehuk dk xyukad cgqr Åapk ¼yxHkx 2050°C½ gksrk gSA bls de rki ij fi?kykus dh –f"V ls blesa ---------------- ,oa ---------------- xkyd ds :i esa iz;qDr fd;s tkus ls xyukad ------------°C ij gh vk tkrk gSA Pure Alumina is melted at very high temperature (approximately 2050°C). To melt ii at low temperature ................... and ................ are mixed as flux which reduce melting point upto ............°C. 10 tc flfydk dh v'kqf) ckDlkbV esa vf/kd gks rc bl [kfut dk 'kks/ku ----------------- fof/k }kjk fd;k tkrk gSA bl fof/k esa --------------- feykdj N dh 2 /kkjk esa 1800°C rd xeZ djrs gSaA When SiO 2 is present as main impurity in boxite then it is purified by the method .................. In this method ............... is mixed and is heated in presence of N 2 at about 1800°C. 11 flfydk ;qDr v'kqf) okys ckDlkbV [kfut dks N dh /kkjk esa dkWd ds lkFk 2 1800°C ij xeZ djus ls ---------------- izkIr gksrk gS rFkk flfydkWu ok"i'khy gksus ls vyx gks tkrk gSA 69
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ikB~;Øe ikB~;Øe jlk;u jlk;u 'kkL=
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5 fLFkj vuqikr fu;e ds LFkkid Fks&
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17 6.023 x 1023 fdlh Hkh nzO; ds ,d
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cgqfodYih; cgqfodYih; iz'uA iz'uA b
Page 9 and 10:
According to Aufbau principle elect
Page 11 and 12:
18 Cr rRo dk bySDVªkfud foU;kl ---
Page 13 and 14:
iz'u&37 fdlh rRo dk ijek.kq Øekad
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
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: iz'u&31 f}rh; lewg ds rRoks dks {kk
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= ----
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