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Q.37 If the shortest wavelength of H-atom in Lyman
series is x, then longest wavelength in Balmer
series of He + is :
(1)
9 x 36 x
(2)
5 5
x
(3)
4
5 x
(4)
9
Q.38 If NaOH is titrated with HCl, variation of
conductance (y-axis) with addition of HCl
(x-axis) will be :
(1)
(3)
Q.39 The maximum entropy of mixing occurs when
hexane and heptane are mixed respectively in the
proportion :
(1) 8.6 g and 10.0 g (2) 8.6 g and 8.6 g
(3) 10.0 g and 8.6 g (4) 10.0 g and 10.0 g
Q.40 Consider following reactions in which A is
converted into B, C and D by different methods :
CH3
I
(CH3)3CCH2CH2OH (B)
CH3CCH CH2
II
(CH3)3CCHCH3 (C)
CH3
(A)
III
(2)
(4)
OH
(CH3)2CCH(CH3)2 (D)
OH
Methods, I, II and III are respectively :
(1) HBO, oxymercuration-demercuration, hydration
(2) HBO, hydration, oxymercuration-demercuration
(3) hydration, oxymercuration-demercuration, HBO
(4) oxymercuration-demercuration, hydration, HBO
Q.41 Glycerol reacts with excess of HI forming :
CH2–I
CH2
(1)
(3)
CH–I
CH2–I
CH3
CH–I
CH3
(2)
CH
CH3
CH3
(4) CH–I
CH2–OH
Q.37 ;fn ykbZeu Js.kh esa H-ijek.kq dh U;wure rjaxnS/;Z
esa x gks] rks He + dh ckej Js.kh dh nh?kZre rjaxnS/;Z
gksxh :
(1)
9 x 36 x
(2)
5 5
x
(3)
4
5 x
(4)
9
Q.38 ;fn NaOH dks HCl ds lkFk vuqekfir fd;k tk;s]
rks HCl (x-v{k) ds ;ksx ds lkFk pkydrk (y-v{k) esa
ifjorZu gksxk :
CAREER POINT, CP Tower, Road No.1, IPIA, Kota (Raj.), Ph: 0744-3040000 Page # 10
(1)
(3)
Q.39 fefJr djus dh lokZf/kd ,.VªkWih gksrh gS] tc gsDlsu
o gsIVsu dks Øe'k% vuqikr esa fefJr fd;k tkrk gS :
(1) 8.6 g rFkk 10.0 g (2) 8.6 g rFkk 8.6 g
(3) 10.0 g rFkk 8.6 g (4) 10.0 g rFkk 10.0 g
Q.40 vfHkfØ;kvksa ij fopkj dhft, ftlesa A fofHkUu izØeksa
}kjk B, C o D esa ifjofrZr gks tkrk gS :
CH3
CH3CCH CH2
CH3
(A)
I
II
III
(2)
(4)
(CH3)3CCH2CH2OH (B)
(CH3)3CCHCH3 (C)
OH
(CH3)2CCH(CH3)2 (D)
OH
izØe I, II o III Øe'k% gS :
(1) HBO, vkWDlheZD;qjhdj.k-foeZD;qjhdj.k] ty;kstu
(2) HBO, ty;kstu] vkWDlheZD;qjhdj.k-foeZD;qjhdj.k
(3) ty;kstu] vkWDlheZD;qjhdj.k-foeZD;qjhdj.k, HBO
(4) vkWDlheZD;qjhdj.k-foeZD;qjhdj.k] ty;kstu, HBO
Q.41 fXyljkWy] HI ds vkf/kD; esa fØ;k djds cukrk gS :
(1)
(3)
CH2–I
CH–I
CH2–I
CH3
CH–I
CH3
(2)
CH2
CH
CH3
CH3
(4) CH–I
CH2–OH