chemistry english tamil(d)

7/27/2019 Chemistry ENGLISH Tamil(D)

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CHEMISTRY

1. xU ilngg;ilby; ,y;yhjJ

A dipeptide does not have

a) ,uz;L ngg;ilL myFfs; two peptide units

b) ,uz;L mkpNdh mkpy gFjpfs; portions of two amino acids

c) xU mkpNlh njhFjp an amido group

d) cg;G Nghd;wnjhU mikg;G salt like structure.

2. pidNf!; !kd;ghl;by; cs;s n!wp"fspd; mLf;Ffspd; #Ljy;

The sum of the powers of the concentration terms that occur in the rate equation is called

a) $yf;#% &z; molecularity

b) pidif order

c) pidNfk; rate

d) pidNf rate constant.

'. bd;lhy; pispw;F cl;glhjJ

The phenomenon of Tyndall effect is not observed in

a) ghy;kk; emulsion

b) #(;k fiu!y; colloidal solution

c) nk); fiu!y; true solution

d) njh*;fy suspension .

4. bfhd; +Deacon -iw)py; FNshhpd; j)hhpj;jypy; pidNfkhw;wp)hf

n!)y;gLJ

Catalyst used in Deacon's method of manufacture of chlorine is

a) ! "b) CuC# $ c) %e $ & ' d) i.



. mh;/puhy; &d;gJ

Argyrol is

a) !py;h; #(;kk; colloidal silver

b) 0d;bkdp #(;kk; colloidal antimony

c) Nfhy;L #(;kk; colloidal gold

d) nkf;d!p)h ghy;kk; milk of magnesia.

. !py;h; 3hz)j;jpypU3;J !py;iug; ng%jypy; -jypy; 3hz)j;Jld;

N!h;f;fg;gLk; fuzp

The reagent which is added first in the separation of silver from silver coin is

a) mlh; !y;4g;)5hpf; mkpyk; conc. sulphuric acid

b) mlh; i6l;NuhFNshhpf; mkpyk; conc. hydrochloric acid

;c) mlh; i3l;hpf; mkpyk conc. nitric acid

;d) ,uh/ jpuhk Aqua regia.

7. (((( 0f;N7h N3h; m)dpfis cUhf;FfpwJ.

""""""""""""""""""""""""" %orms oocations

a) yh3;jidLfs; *anthamide

b) 0f;bidLfs; Actinides

c) c)hp) h8f;fs; oble gases

d) fhu cNyhf*;fs;. Alkali metals

9. mN)hlgh4h;k; N!hjidf;F cl;gLk; N!h;kk;

Compound which undergoes iodoform test is

a) 1:ngd;ldhy; pentanol

b) 2:ngd;lNdhd; $"pentanone

c) ':ngd;lNdhd; "pentanone

d) ngd;lNdy pentanal.



. py;yp)k;!d; njhFj;jy; -iw)py; il:&j;jpy;:<jh; j)hhpj;jy; xU

The preparation of diethyl ether by +illiamson's synthesis is a , an

a) fUf;fh; N!h;f;if pid nucleophilic addition reaction

b) &yf;l;uhd; fh;N!h;f;if pid electrophilic addition reaction

c) &yf;l;uhd; fh; gjpyl;L pid electrophilic substitution reaction

d) fUf;fh; gjpyl;L pid. nucieophilic substitution reaction.

1=. fjhpy; cs;s 0f;7p/d; ypikkpf;f mkpy*;f>ld; 0f;N!hdp)k;

cg;igj;jUk; pid)py; 3pf(;J#n the formation of ooniurn salt when etherial oygen reacts with strong mineral acid is called

a) &yf;l;uhd; ?w;wk; electronation

b) GNuhl;lhd; ?w;wk; protonation

c) GNuhl;lhd; 3f;fk; deprotonation

d) 3h; 3f;fk; dehydration.

11. gpd;Udw;%s; &!;N!h;kk; 0f;7p/Ndw;wj;jpd;NghJ <j;ijy;

kj;ijy; fl;Nlhidj; jUk;@

+hich of the following compounds is oidised to give ethyl methyl ketone -

a) 2:Gug;gdhy; $"propanol

b) 2:ngd;lNdhd; $"pentanone

c) 1:gp)5l;ldhy; "butanol

d) 2:gp)5l;ldhy;. $"butanol

12. &j;jpypd; il!)idil mkpyj;ij g)d;gLj;jp 3uhw;gFj;jhy; fpilg;gJ

/thylene dicyanide on hydrolysis using acid gives



a) 0f;!hypf; mkpyk; !alic acid

b) !f;!pdpf; mkpyk; 0uccinic acid

c) mbg;gpf; mkpyk; Adipic acid

d) GNuhg;gp)hdpf; mkpyk; 1ropionic acid.

1'. 4g;nu*;fy; FiwghL cs;s gbf*;fspy; &jph;kpd; m)dp)pd;

cUs"

The si2e of the anion in %renkel defect crystal is

a) N3h;kpd; m)dpi) pl nghp)jhf ,Uf;Fk; larger than the cation

b) N3h;kpd; m)dpi) pl !pwp)jhf ,Uf;Fk; smaller than the cation

c) N3h;kpd; m)dp)pd; mspw;F !kkhf ,Uf;Fk; equal in si2e

with cation

d) ,uz;Lk; nghp) mshf ,Uf;Fk;. both are larger in si2e.

1A. xU 3h;kk; nfhjpf;Fk; NghJ

+hen a liquid boils3 there is

a) &d;l;Nuhgp c)UfpwJ an increase in entropy

b) &d;l;Nuhgp FiwfpwJ a decrease in entropy

c) 0p)hjypd; ng;gk; c)UfpwJ an increase in heat of vapori2ation

d) fl;byh 0w;wy; mjpfhpf;fpd;wJ. an increase in free eneregy

1. fpg;7; fl;byh 0w;wypy; ?w;gLk; khw;wk;

Change in 4ibbs free energy is given by

a ∆45∆67T∆0 b) ∆45∆6"T∆0

c) ∆45∆68T∆0 d ∆45∆6,T∆0

16. N6gh; -iw)py; mk;Nkhdp)h cUhjy; (((( 3piy)py;

mjpfhpf;Fk;.



#n the 6aber process the yield of ammonia is greater

a) mjpf mBj;jk; at high pressure

b) Fiw3;j mBj;jk; at low pressure

c) c)h; ng;g3piy)py; at high temperature

d) pid)5f;fp ,y;yhj NghJ. in absence of catalyst.

1C. &yf;l;uhdpd; <hp)y;Gj; jd;iki) psf;fp)h

Dual character of an electron was eplained by

a) Nghh; 9ohr

b) n6);!d;gh;f; 6eisenberg

c) b. gpuhf;Ns de 9roglie

d) ghyp. 1auli.

18. 2s 0h;gpl;lhypy; cs;s Nfhs N3hLfspd; +0pherical nodes

&z;zpf;if

u mber of sph erical nodes in $s orbi tal is

a) b) $ c) d) :

1. njhFjp)py; NkypU3;J f(hf!; n!y;Dk; NghJ m)dp)pd; 0uk;

!n moving down the group3 the radius of an ion.

a) FiwfpwJ decreases

b) mjpfhpf;fpd;wJ increases

c) &3;jpj khw;w-k; ,y;iy no change

d) ,i midj;Jk;. all of these

2=. gpd;Udw;%s; &J &jph; 0f;7p/Ndw;w 3piyi) kl;Lk;ngw;wpUf;Fk;@

+hich of the following shows negative oidation state only-



a) 9r b) % c) Cl d)#.

21. FNuhkp)j;jpd; nspf;#l;bd; &yf;l;uhd; mikg;G

The outer electronic configuration of chromium is

a) d ; :s < b) d = :s c) d: 4s$ d) d 4s$ 4p 1.

22. i3l;Nuh 0f;NfdpDs;s >!2:njhFjpi) >6$ njhFjp)hf khw;%k;

fuzp

#n nitroalkanes "! $ group is converted to "6 $ group by the reaction with

a) 0n,6C# b)?n dust@?n Jfs;)

c) ?n , 6 : Cl d) ?n , a!6.

2'. f(;fz;lw;wpy; &J $piz) i3l;Nuh N!h;kk;

The tertiary nitro compound is

a) 2:i3l;Nuh Gug;Ngd; $"nitropropane

b) 1:i3l;Nuh Gug;Ngd; "nitropropane

c) 1:i3l;Nuh:2E 2:il nkj;jpy; Gug;Ngd; "nitro"$3 $"dimethyl propane

d) 2:i3l;Nuh:2:nkj;jpy; Gug;Ngd;. $"nitro"$"methyl propane

2A. f(;f;fz;lw;wpy; &J ngd;!d; i3l;Nuh ?w;w pid)py; pid,ilg;nghUshFk;

The intermediate formed in the nitration of ben2ene is

a) mh;hdp)k; m)dp Arrenium ion

b) fhh;Ngdp)hd; Carbanion

c) 0f;N7hdp)k; m)dp !onium ion

d) i3l;iul; m)dp itrite ion.

2. f;Nuh!pd; &jph;(w;!p khw;wk; &d;gJ



#nversion of sucrose refers to

a) f;Nuh ?w;wkiljy; oidation of sucrose

b) f;Nuh xLf;fk; miljy; reduction of sucrose

;c) f;NuhE F>NfhE kw;%k; 4g;uf;Nlh!hf !pijjy hydrolysis ofsucrose to glucose and fructose

d) f;Nuh gygb)hjy; polymerisation of sucrose.

chemistry english tamil(d)

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