Q.1
Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? ( Numbers in the parenthesis are atomic numbers)
  • a) Ti22 and Zr40
  • b) Zr40 and Nb41
  • c) Zr40 and Hf72
  • d) Zr40 and Ta73
Q.2
The compound which gives oxygen on moderate heating is
  • a) Zinc oxide
  • b) Mercuric oxide
  • c) Aluminium oxide
  • d) Ferric oxide
Q.3
Silver, mercury and lead have been placed in same group of qualitative analysis, because they form ... ..
  • a) carbonates soluble in dilute HNO3
  • b) nitrate
  • c) insoluble chlorides
  • d) same type of coloured compounds
Q.4
Maximum oxidation state is presented by … [ IIT 2004]
  • a) CrO2Cl2 and MnO4-
  • b) MnO2
  • c) [Fe(CN)6]3- and [Co(CN)6]3-
  • d) MnO
Q.5
Assertion : Fe3O4 is paramagnetic at room temperature and become ferromagnetic at 850K Reason : The randomization of spin takes place with temperature
  • a) Assertion and Reason both are correct and Reason is correct explanation to Assertion
  • b) Assertion and Reason both are correct and Reason is not correct explanation to Assertion
  • c) Assertion is correct but reason is wrong
  • d) Assertion is wrong but reason is correct
Q.6
Lithopone, a white pigment, consists of ....
  • a) Al2O3 and CaCO3
  • b) BaS and PbSO4
  • c) ZnS and BaSO4
  • d) PbS and MnO
Q.7
The compound widely used in making reference electrode is
  • a) ZnCl2
  • b) CuSO4
  • c) Hg2Cl2
  • d) HgCl
Q.8
In nitroprusside ion, the iron and NO exist as FeII and NO+ rather than FeIII and NO. These forms can be differentiated by …[ IIT 1998]
  • a) Estimating the concentration of iron
  • b) Measuring the concentration of CN-
  • c) Measuring the solid state magnetic moment
  • d) Thermally decomposing the compound
Q.9
What effect is noticed on shaking dilute sulphuric acid with a small quantity of anhydrous copper sulphate?
  • a) The white solid dissolves to form a colourless solution
  • b) The white solid dissolves to form a green solution
  • c) The white solid turns blue but does not dissolve
  • d) The white solid dissolves to form a blue solution
Q.10
Which of the following pairs has the same
  • a) Fe2+, Ni2+
  • b) Zr4+, Ti4+
  • c) Zr4+, Hf4+
  • d) Zn2+, Hf i4+
Q.11
Which one of the following statements is correct when SO2 is passed through acidified K2Cr2O7 solution? [ NEET 2016]
  • a) The solution is decolorized
  • b) SO2 is reduced
  • c) Green Cr2(SO4)3 is formed
  • d) The solution turns blue
Q.12
A compound is yellow when hot and white when cold, The compound is ...
  • a) Al2O3
  • b) PbO
  • c) CaO
  • d) ZnO
Q.13
The d-electron configuration of Cr2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behavior? [ AIPMT 2011] ( At.no. Cr=24, Mn=25, Fe=26, Co=27)
  • a) [Fe(H2O)6]2+
  • b) [Co(H2O)6]2+
  • c) [Cr(H2O)6]2+
  • d) [Mn(H2O)6]2+
Q.14
Which metal cation forms stronger complex salt?
  • a) Zn2+
  • b) Cd2+
  • c) Hg2+
  • d) All of same strength
Q.15
Mercury forms amalgams with all except [ PET 1991]
  • a) Al
  • b) Zn
  • c) Ni
  • d) Fe
Q.16
Steel that is resistant to acids is ... ..
  • a) Fe
  • b) Cu
  • c) Ag
  • d) Zn
Q.17
For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order? ( At.no. Cr=24, Mn=25, Fe=26, Co=27)
  • a) Fe > Mn > Co > Cr
  • b) Co > Mn > Fe > Cr
  • c) Cr > Mn > Co > Fe
  • d) Mn > Fe > Cr > Co
Q.18
On heating ZnCl2 . H2 O the compound obtained is ... ..
  • a) ZnCl2
  • b) Zn(OH)Cl
  • c) Zn(OH)2
  • d) ZnO
Q.19
Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation? [ AIMPT 2015]
  • a) FeSO4
  • b) FeSO3
  • c) FeC2O4
  • d) Fe(NO2)2
Q.20
Identify the incorrect statement among the following …[ AIEEE 2007]
  • a) 4f and 5f-orbitals are equally shielded
  • b) d-block elements show irregular trend and erratic chemical properties among themselves
  • c) La and Lu have partially filled d-orbitals and no other partially filled orbitals
  • d) The chemistry of various lanthanoids is very similar
Q.21
The lanthanoid contraction relates to
  • a) Atomic radii
  • b) Atomic as well as M3+ radii
  • c) Valence electrons
  • d) Oxidation states
Q.22
Which of the following ions will exhibit colour in aqueous solutions? [ AIPMT 2010]
  • a) La3+ (Z=57)
  • b) Ti3+ (Z=22)
  • c) Lu3+ (Z=71)
  • d) Sc3+ (Z=21)
Q.23
The flux used in soldering is
  • a) HgO
  • b) ZnO
  • c) CdO
  • d) None of these
Q.24
The substance that sublimes on heating is …
  • a) MgCl2
  • b) AgCl
  • c) HgCl2
  • d) NaCl
Q.25
Which one of the following ions has electronic configuration [Ar]3d6? [ AIPMT 2010]
  • a) Ni3+
  • b) Mn3+
  • c) Fe3+
  • d) Co3+
Q.26
Reason of lanthanoid contraction is …[ AIPMT 2014]
  • a) Negligible screening effect of f-orbitals
  • b) Increasing nuclear change
  • c) Decreasing nuclear charge
  • d) Decreasing screening effect
0 h : 0 m : 1 s