Processing math: 100%




<<12345>>
16.

 Consider the following reaction, xMnO4+yC2O24+zH+xMn2++2yCO2+z2H2O

 The values of x, y, and z in the reaction are respectively


A) 5 ,2 and 16

B) 2 ,5 and 8

C) 2 ,5 and 16

D) 5 ,2 and 8



17.

The order of stability of the following carbocations

                     +                                     +  

CH2=CHCH2(I);CH3CH2CH2 (II);

242021627_P12.JPG

 


A) III >II>I

B) II > III > I

C) I >II > III

D) III >I > II



18.

Which of the following arrangements does not represent the correct order of the property stated against it"


A) V2+ < Cr2+ < Mn2+ < Fe2+: paramagnetic behaviour

B) Ni2+ < Co2+ < Pe2+ < Mn2+ : ionic size

C) Co3+ < Fe3+ < Cr3+ < Sc3+: stability in aqueous solution

D) Sc < Ti < Cr < Mn : number of oxidation states



19.

 A compound with molecular mass 180 is acylated with CH3 COCl to get a compound with molecular mass 390. The number of amino groups presents per molecule of the former compound is 


A) 2

B) 5

C) 4

D) 6



20.

The rate of reaction  doubles when its temperature changes from 300K  to 310 K. Activation energy of such a reaction  will be (R=8.314 JK-1 mol-1  and log 2= 0.301)


A) 53.6kJmol1

B) 48.6kJmol1

C) 58.5kJmol1

D) 60.5kJmol1



<<12345>>