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26.

The qualitative sketches I, II and III given below show the variation of surface tension with the molar concentration of three different aqueous solutions of KCI.CH3 OH and  $CH_{3}(CH_{2})_{11}OSO_{3}^{-}Na^{+}$ at  room temperature

1222021206_c3.JPG

The correct assignment of the sketches is 


A) $I. KCI, II. CH_{3}OH, III. CH_{3}(CH_{2})_{11}OSO_{3}^{-}Na^{+}$

B) $ I. CH_{3}(CH_{2})_{11}OSO_{3}^{-}Na^{+}, II. CH_{3}OH, III. KCI.$

C) $ I. KCI, II. CH_{3}(CH_{2})_{11}OSO_{3}^{-}Na^{+}, III. CH_{3}OH.$

D) $ I. CH_{3}OH, II. KCI, III. CH_{3}(CH_{2})_{11}OSO_{3}^{-}Na^{+}.$



27.

In the following reaction sequence in aqueous  solution, the species X, Y and Z, respectively are

$S_{2}O_3^{2-}\underrightarrow {Ag^{+}}$  $X (Clear. solution)$   $\underrightarrow {Ag^{+}}$  $Y (white. ppt)\underrightarrow {with.time}$  $Z (black.ppt)$


A) $[Ag(S_{2}O_{3})_{2}]^{3-}, Ag_{2}S_{2}O_{3}.Ag_{2}S$

B) $[Ag(S_{2}O_{3})_{3}]^{5-}, Ag_{2}S_{}O_{3}.Ag_{2}S$

C) $[Ag(S_{}O_{3})_{2}]^{3-}, Ag_{2}S_{2}O_{3}.Ag_{}$

D) $[Ag(S_{}O_{3})_{3}]^{3-}, Ag_{2}S_{}O_{4}.Ag_{}$



28.

 The correct order of acidity for the  following compounds

122202113_c1.JPG


A) I>II>III>IV

B) III>I>II>IV

C) III>IV>II>I

D) I>III>IV>II



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