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11.

 Three moles of B2H6 are completely reacted with methanol. The number of moles of boron containing product formed is 


A) 4

B) 2

C) 5

D) 6



12.

 Among the complex ions,$[Co(NH_{2}-CH_{2}-CH_{2}-NH_{2})_{2}Cl_{2}]^{+},$ $[CrCl_{2}(C_{2}O_{4})_{2}]^{3-},$ $[Fe(H_{2}O)_{4}(OH)_{2}]^{+}$,$[Fe(NH_{3})_{2}(CN)_{4}]^{-}$

   $[Co(NH_{2}-CH_{2}-CH_{2}-NH_{2})_{2}(NH_{3})Cl]^{2+}$ and $[Co(NH_{3})_{4}(H_{2}O)Cl]^{2+}$  the  number of complex ion(s) that show(s)  cis-trans isomerism is


A) 4

B) 5

C) 6

D) 8



13.

 In the complex acetylbromidodicarbonylbis (triethylphosphine ) iron (II)  , the number of Fe -C bond (s) is 


A) 3

B) 4

C) 2

D) 1



14.

 If the unit cell of a mineral  has cubic close-packed (ccp) array of oxygen atoms with m fraction of octahedral  holes occupied  by aluminium ions and n fraction of tetrahedral holes  occupied  by magnesium ions, m and n respectively, are 


A) $\frac{1}{2},\frac{1}{8}$

B) $1,\frac{1}{4}$

C) $\frac{1}{2},\frac{1}{2}$

D) $\frac{1}{4},\frac{1}{8}$



15.

Fe3+ is reduced to Fe2+ by using 


A) $ H_{2}O_{2}$ in presence of NaOH

B) $ Na_{2}O_{2}$ in water

C) $ H_{2}O_{2}$ in presence of $H_{2}SO_{4}$

D) $ Na_{2}O_{2}$ in presence of $H_{2}SO_{4}$



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