||MCQS for JEE and AIPMT || HOME
TOPIC:: d - BLOCK ELEMENTS COORDINATION COMPOUNDS AND ORGANOMETALLICS : PAGE#1
CLICK ON THE CORRECT OPTION,
TO GET SOLUTION, CLICK ON SOLUTION

Q1) Copper and concentrated H2SO4 reacts to produce [ AFMC 1997]




SOLUTION

Cu is less reactive than Hydrogen hence it cannot displaces hydrogen from sulphuric acid and produces SO2
Cu + 2H2SO4 → CuSO4 + SO2 + 2 H2O
Answer: (b)


Q2) Oxidation number in CH2Cl2 is .. [ AFMC 2004]




SOLUTION

let oxidation number of C be'x'
x+2-2 = 0
Answer: (a)


Q3) What is the correct order of spin only magnetic moment (in Bm) of Mn2+, Cr2+, and V2+ ? [ AFMC 2008]



SOLUTION

Number of unpaired electrons
Mn2+ = 5
Cr2+ = 4
V2+ = 3
Since magnetic moment is given by formula
magnetic moment formula
therefore Mn2+ > Cr2+ > V2+
Answer:(c)



Q4) Lanthanide contraction can be observed in [ AFMC 2009]



SOLUTION

Amongst the given elements, only Gd is a lanthanide
Answer: (b)


logo
All contents ©Copyright 2013 www.gneet.com
Site Design © 2013 All Rights Reserved Gore Coaching Classes