Chemistry ENGLISH Tamil(B)

8/12/2019 Chemistry ENGLISH Tamil(B)

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CHEMISTRY

1. xU ePh;kk; nfhjpf;Fk; NghJWhen a liquid boils, there is

a) vd;l;Nuhgp caUfpwJ an increase in entropy

b) vd;l;Nuhgp FiwfpwJ a decrease in entropy

c)Mtpahjypd; ntg;gk; caUfpwJ an increase in heat of vaporization

d) ;byh Mw;wy; jpfhpf;fpd;wJ. an increase in free eneregy

!. fpg;"; ;byh Mw;wypy; #w;g$k; khw;wk;Change in Gibbs free energy is given by

a% G=H+TS b) G=HTS

c) G=H!TS d% G=H"TS

&. N'gh; (iwapy; k;Nkhdpah cUthjy; ####epiyapy;

jpfhpf;Fk;.

$n the Haber process the yield of a%%onia is greater

a) jpf )j;jk; at high pressure

b) Fiwe;j )j;jk; at lo& pressure

c) cah; ntg;gepiyapy; at high te%perature

d)tpida*f;fp +y;yhj NghJ. in absence of catalyst'

,. vyf;l;uhdpd; -hpay;j; jd;ikia tp/f;fpath(ual character of an electron &as eplained by

a)Nghh; Bohr

b)n'a;0d;gh;f; Heisenberg

c)b. gpuhf;N/ de Broglie

d)ghyp. Pauli.

. !sMh;gpl;lhypy; c/;/ Nfh/ Neh$f/pd; 2Spherical nodes% v3;3pf;if*u %ber of sph erical nodes in s orbi tal is

a) b) c) - d) .

4. njhFjpapy; NkypUe;J fP5hf0; n0y;6k; NghJ adpapd; Muk;/n %oving do&n the group, the radius of an ion'


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a) FiwfpwJ decreases

b) jpfhpf;fpd;wJ increases

c) ve;jtpj khw;w(k; +y;iy no change

d)+it idj;Jk;. all of these

7. gpd;tUtdtw;8/; vJ vjph; Mf;"p9Ndw;w epiyia kl;$k;

ngw;wpUf;Fk;:Which of the follo&ing sho&s negative oidation state only0

a) 1r b) 2 c) 3l d)$'

. FNuhkpaj;jpd; nt/pf;njhFjpia 7*HnjhFjpahf khw;8k; fu3p$n nitroal8anes */ +group is converted to *H +group by the reaction &ith

a) Sn"H3$ b)9n dust:9nJf/;)

c) 9n " *H .3l d) 9n " *a/H'

1?. fP5;f3;ltw;wpy; vJ @tpi3a iel;Nuh N0h;kk;The tertiary nitro co%pound is

a) !>iel;Nuh ug;Ngd; nitropropane

b) 1>iel;Nuh ug;Ngd; nitropropane

c)1>iel;Nuh>!A !>il nkj;jpy; ug;Ngd; nitro, di%ethyl propane

d)!>iel;Nuh>!>nkj;jpy; ug;Ngd;. nitro%ethyl propane

11. fP5;f;f3;ltw;wpy; vJ ngd;0Pd; iel;Nuh #w;w tpidapy; tpid+ilg;nghU/hFk;The inter%ediate for%ed in the nitration of benzene is

a) h;hPdpak; adp ;rreniu% ionb) fhh;Ngdpahd; 3arbanion

c) Mf;N"hdpak; adp /oniu% ion


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d) iel;iul; adp *itrite ion'

1!. Bf;Nuh0pd; vjph;B5w;0p khw;wk; vd;gJ$nversion of sucrose refers to

a) Bf;NuhB #w;wkiljy; oidation of sucrose

b) Bf;NuhB x$f;fk; iljy; reduction of sucrose

;c) Bf;NuhBA FCNfhBA kw;8k; Dg;uf;Nlh0hf 0pijjy hydrolysis of

sucrose to glucose and fructose

d) Bf;NuhB gygbahjy; poly%erisation of sucrose'

1&. xU ilngg;ilby; +y;yhjJ; dipeptide does not have

a) +u3;$ ngg;il$ yFf/; t&o peptide units

b) +u3;$ kpNdh kpy gFjpf/; portions of t&o a%ino acids

c) xU kpNlh njhFjp an a%ido group

d) cg; Nghd;wnjhU ikg; salt li8e structure'

1,. tpidNtf0; 0kd;ghl;by; c/;/ n0wpEf/pd; $f;Ff/pd;


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14. bfhd; 2(eacon% (iwapy; FN/hhpd; jahhpj;jypy;

tpidNtfkhw;wpahf n0ay;g$tJ3atalyst used in (eacon


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c) &>ngd;lNdhd; -pentanone

d) ngd;lNdy pentanal'

!1. tpy;ypak;0d; njhFj;jy; (iwapy; il>vj;jpy;>-jh; jahhpj;jy; xU

The preparation of diethyl ether by Willia%son


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Chemistry ENGLISH Tamil(B)