Sc. & Tech. (I) d p DÑf ról$p rhje : rhop A s Óop (cpn - 1) NyZ : 40 ^p fz : 10 dy kde : 2 L$gpL$ â.1 (A) _uq _p âñp DL $gp. (NyZ 5) (i) dy¼s \pe R>. (1) (ii) rhov$_ âq¾$ep (1) (iii) X$p b fpe_f_p ÓeL$_p r_ed A_ykpf 6.9 + 39.1 kp qx$ad_p `fdpzycpf 23 (1) 2 (iv) lbg v$ fbu_ : c ` $\u KQpC; lbg v$ fbu u c dz L$np : r_ç_ L$np (1) (v) Äepf âl$pi_p ql$fzp `psmp dpýeddp \u O_ (OË$) dpýeddp Åe R>, Ðepf s g b (õs rcl$p) sfa hm R>. (1) â.1 (B) uq p ep edp u ep Áe ep e k v$ L$fp. (NyZ 5) (i) (b) B dp p Qy bl$ue n Ó_u suh sp h^pf R>. (1) (ii) (a) X$v$p sfa lgphhp X$i (1) (iii) (a) Cu, Fe, Zn, Al (1) (iv) (b) b ÞTu (1) (v) (d) 54 N (1) â.2. uq p âñp DL $gp. (L$p C Z p Q) (NyZ 10) (1) (i) Ahfp ^dp \u Bg ¼V²$p y hl_ \sp (rhûys âhpl hl sp lp e Ðepf ) Bg ¼V²$p NrsS> EÅ âpá \pe R>. (ii) Bg ¼V²$p y hl_ \sp s AZy, Ape_, `fdpzy kp\ A\X$psp s d_u NrsS> EÅ Ap R>u \pe R>. (1) (iii) EÅ Anesp_p r_ed A_ykpf Ap R>u \e gu NrsS> EÅ DóZsp_p õhê`dp Ahfp ^dp Å hp dm R>. (2) (a) ¾$p rsl$ L$p Z r 90 (b) Ap sqfl$ `fphs _ (c) âl$pi_y ql$fz O_ dpýeddp \u `psmp dpýeddp S>sy lp e Ðepf Ap`ps L$p Z_y d ëe h^pfsp fl hp\u h¾$uc sl$p Z_y d ëe h^sy Åe R>. `f sy rhriô Ap`ps L$p Z (¾$p rsl$ L$p Z) `R>u âl$pi_y ql$fz O_ dpýeddp `pry> Aph R>. (3) (d) hpsphfz_p hpeyap _p bv$gpsp h¾$uch_p L$ lhp_u O_sp A_ bv$gpsp DóZspdp p L$pfZ hpsphfz [õ\f lp sy _\u, s u lhp_p h¾$uch_p L$ kss bv$gpe R>. 1
h¾$uch_p L$dp \sp a fapf_ gu^ spfpap _u Apcpku [õ\rs A_ âmfsp kss bv$gpe R> A_ s \u spfpap V$dV$dsp v$ Mpe R>. (1) (4) A ^psy b ^psy L$fsp h^y q¾$epiug R>. A ^psy_p `fdpzy¾$dp L$ 11 R> dpv$ s Na R>. (1) 2Na + 2Cl 2NaCl (aq) + 2 (g) (1) (5) rd u (C 4 ) Bg ¼V²$p V$ L$p k fq p : (1) C fq pk Ó : (1) C (6) Ap` gu dprlsu : N l_y Öìedp_, M P 8M E N l_u róäep, R P 2R E ` Õhu `f_p dyr¼sh N, V esc. E 11.2 km/s N l `f_p dyyr¼sh N, V esc. P? V esc. P 2GM P R P 2G(8M E ) 2R E 8 2 2GM E R E 8 2GM E 2 R E 4 V esc. E Q V esc. E 2GM E R 2 11.2 E V esc. P 22.4 km/s N l `f_p dyyr¼sh N 22.4 km/s 2
(7) AhL$pi Arcep_ :- ` Õhu_u L$npdp L $ród D`N l âõ\pr`s L$fu_ s _p D`ep N k ip ^_ A_ Æh_ D`ep Nu bpbsp dpv$ L$fhp A\hp k e dpmp_p A\hp s _u blpf_p rhrh^ OV$L$p sfa AhL$piep_ dp L$gu_ s _p Aæepk dpv$ Qgph g Arcep_. (1) S>êqfeps A_ dlðh :- k fnz, k v$ ihl_, lhpdp_, r_funz, qv$ipv$i L$ hn f k b r^s, õhds. (1) â.3. uq p âñp EL $gp (L$p C Z p Q) (NyZ 15) (1) Ap` gu dprlsu : t 2 s, g 10 m/s 2, u 0, a g s?, v? s ut + 1 2 gt2 0 1 + 1 2 (10) (1)2 0 + 1 2 (10) s 5 m v u + gt 0 + 10 1 v 10 m/s V$ bg_u KQpC 5 m, S>du_ `f `lp Qsp v$x$p_p h N 10 m/s (2) (i) AgNO 3 A_ NaCl âq¾$el$p A_ AgCl A_ NaNO 3 DÐ`pqv$sp R>. (1) (ii) âq¾$el$p A_ DÐ`pqv$s NaNO 3 S>gue ÖphZ_p õhê`dp R>. (1) (iii) DÐ`pqv$s AgCl Ahn ` ê`dp s epf \ep R>. (1) (3) (i) A - k s á lpex²$p L$pb _ B - k s á lpex²$p L$pb _ (ii) A - âp ` _ B - âp `u_ (iii) A - C 3 8 C 2 u k ep 3 B - C 3 6 C 2 u k ep 1 (4) (i) Qy bl$ue n Ó_p âcph l W$m rhûys âhpl_p hpll$ `f bm r_dp Z \pe R>. (1) (ii) ãg tdn_p X$pbp lp\_p r_ed_p D`ep N \pe R>. (iii) rhûys dp V$f h opr_l$ A_ sp ról$ v$rôa _pdr_v$ ris ApL $rs (1) (5) (i) rhriô Dódp^pfL$sp. (1) 3
(ii) rhriô Dódp^pfL$sp : A L$d Öìedp_ ^fphsp `v$p\ _y DóZspdp_ h^pfhp dpv$ Å Csu DóZsp. (1) (iii) DóZsp_p rhr_de(g hx$v$ hx)$_p rký^p s dys>b, DóZ hõsya Nydph gu DóZsp W$ X$u hõsya N lz L$f gu DóZsp. Ap L $rsdp gp M X$_p Np mpa N lz L$f gu DóZsp h^y âdpzdp duz_ Ap`hpdp Aph R> s \u s h^y _uq Åe R>. s d S> kukp_p Np mp Ap R>u DóZsp N lz L$f R>. `qfzpd Ap R>u DóZsp duz_ Ap` R>. dpv$ s Ap R>p _uq Åe R>. (1) (6) uq p ApL $rsb ^ Z L$fu uq Ap gp âñp p S>hpb Ap p. (1) L$pQu ^psy p kl $ÞÖL$fZ u Ý^rsAp $NyêÐhue Õ L$fZ Ý^rs Qy bl$ue ` Õ\L$fZ `Ý^rs r npg auzàgh_ `Ý^rs (i) auzàgh_ `Ý^rs (ii) L$pQu ^psy_p bpful$ c L$p `pzu cf gu A L$ dp V$u V$p L$udp _pmhpdp Aph R>. auz r_dp Z L$fhp dpv$ `pc y s g `pzudp _pmhpdp Aph R>. lhp_y bpz, hgp Zp_u dv$v$\u s g, `pzu A_ lhp dmu_ auz s epf \pe R> A_ ` $cpn `f sf R>. (7) gp M X$ f rhûys fpkperzl$ âq¾$ep L$pfZ L$pV$ gpn R>. gp M X$ p $cpn f p Sy>v$p -Sy>v$p cpn ^ pn A GZpN b R>. * ^ pn f su fpkperzl$ âq¾$ep Fe (s) Fe 2+ (aq) + 2e * GZpN f su fpkperzl$ q¾$ep O 2 (g) + 4 + (aq) + 4e 2 2 O (l) ^ pn f u Fe 2+ Ape p õ mp sf v$fçep `pzu kp âq¾$ep C Fe 3+ Ape s epf pe R>. Fe 3+ dp u AÖpìe gpg f N p ks>g Ap ¼kpBX$ s epf pe R> s S> L$pV$ L$l hpe R>. 2Fe 3+ (aq) + 4 2 O (l) Fe 2 O 3 2 O (s) + 6 + (aq) k ` Z âq¾$ep ep Áe DÑf krls afu\u gmu lp e sp S> NyZv$p_ L$fhy. ârsb ^pðdl$ D pe f N L$fhp, S>ks rhg `_, ^_^ yhug `_, L$gpC, rhûys rhg `_, k rdîul$fz hn f (L$p C`Z A L$ ârsb ^pðdl$ D`pe gmhp AphíeL$) 4
â.4 uq p âñp DL $gp (L$p C Z A L$) (NyZ 5) (1) (i) `fdpzy¾$dp L$ 12 (1) (ii) b ^_p L$ 2 (1) (iii) NZ 2 (1) (iv) Aphs _ 3 (1) (v) 4 Be (1) (2) (i) k ey¼s k ÿdv$i L$ (1) (ii) h opr_l$ A_ sp ról$ v$rôa _pdr_v$ ris ApL $rs (1) (hõsy, `v$p\ h¾$l$pq, _ ról$p, ârsdp) (iii) b h¾$l$pq_p A L$rÓs `qfzpd\u h^y rh`ygsp d mhu il$pe R>. rh`ygsp b sb½$pdp \pe R>. A L$ h¾$l$pq\u s epf \e gu ârsdp buå h¾$l$pq dpv$ hõsy lp e R>. h¾$l$pqp hãq _y A sf bv$gu_ õ`ô ârsdp d mhu il$pe R>. (1) (iv) f¼sl$rzl$p, âpzu A_ h_õ`rs_p L$p i, b L$V$ qfep_p Aæepk dpv$ (1) (v) L$p C`Z ep Áe D`pe (1) (v$p. s. _prce A sf_p rhqpf L$fu_ L$pQ `k v$ L$fhp.) 5