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VITEEE 2014 :: Chemistry :: General questions




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6.

In Langmuir's model of adsorption of gas  on a solid surface , 


A) the rate of dissociation of adsorption molecules from the surface does not depend on the surface converted

B) the adsorption at a single site on the surface may involve multiple molecules at the same time

C) The mass of gas striking a given area of surface is proportional to the pressure of the gas

D) the mass of gas striking a given area of surface is independent of the pressure of the gas



7.

Which of the following oxides is strongly basic?


A) $Tl_{2}O$

B) $B_{2}O_{3}$

C) $Al_{2}O_{3}$

D) $Ga_{2}O_{3}$



8.

Which of the following compounds cannot be prepared singly by the  Wurtz reaction?


A) $C_{2}H_{6}$

B) $(CH_{3})_{2}CHCH_{3}$

C) $CH_{3}CH_{2}CH_{2}CH_{3}$

D) All of the above can be prepared



9.

If the elevation in boiling point of  a solution of 10 g of solute (mol.wt=100) in 100 g of water is $\triangle T_{b}$ , the ebulliscopic constant of water is 


A) 10

B) $100 T_{b}$

C) $\triangle T_{b}$

D) $\frac{ \triangle T_{b}}{10}$



10.

Which of the following does not represent the correct order  of the property indicated?


A) $Sc^{3+}$ > $Cr^{3+}$ > $Fe^{3+}$ > $Mn^{3+}$ -ionic radii

B) Sc < Ti < Cr < Mn -density

C) $Mn^{2+}$ > $Ni^{2+}$> $Co^{2+}$ > $Fe^{2+}$-ionic radii

D) FeO < CaO < ;MnO < CuO- basic nature



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