NEET
Chemistry
d and f Block Elements
Previous Years Questions

Given below are two statements : Statement I : Cr2+ is oxidising and Mn3+ is reducing in nature. Statement II : Sc3+ compounds are repelled by the app...
The incorrect statement among the following is :
Which of the following reactions is the metal displacement reaction? Choose the right option.
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of :
Identify the incorrect statement.
Which one of the following ions exhibits d-d transition and paramagnetism as well?
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code : .tg {border-colla...
HgCl2 and I2 both when dissolved in water containing I$$-$$ ions, the pair of species formed is
Name the gas that can readily decolourise acidified KMnO4 solution.
The reason for greater range of oxidation states in actinoids is attributed to
Which one of the following statements related to lanthanoids is incorrect?
Which one of the following statements is correct when SO2 is passed through acidified K2Cr2O7 solution?
The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No.65) are
Assuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation? ...
Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
Magnetic moment 2.84 B.M. is given by (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)
Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic nu...
Which of the following processes does not involve oxidation of iron?
Magnetic moment 2.83 BM is given by which of the following ions? (At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)
The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives
Reason of lanthanoid contraction is
Sc (Z = 21) is a transition element but Zn (Z = 30) is not because
Which of the following lanthanoid ions is diamagnetic? (At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)
Which of the following statements about the interstitial compounds is incorrect?
Which one of the following does not correctly represent the correct order of the property indicated against it?
Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential \left( {E_{{M^{2...
The catalytic activity of transition metals and their compounds is ascribed mainly to
Which of the following exhibits only + 3 oxidation state?
Which of the statements is not true?
Identify the alloy containing a non-metal as a constituent in it.
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? ...
Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This is due to the formation of ...
Match List I (substances) with List II (processes) employed in the manufacture of the substances and select the correct option. .tg {border-collaps...
Which of the following oxidation states is the most common among the lanthanoids?
Which of the following ions will exhibit colour in aqueous solutions?
Which of the following pairs has the same size?
Which of the following ions has electronic configuration [Ar]3d6? (At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
The correct order of decreasing second ionisation enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is
Which one of the following ions is the most stable in aqueous solution? (At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)
Identify the incorrect statement among the following:
In which of the following pairs are both the ions coloured in aqueous solution? (At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is
Copper sulphate dissolves in excess of KCN to give
More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is
The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is
The aqueous solution containing which one of the following ions will be colourless? (Atomic number : Sc = 21, Fe = 26, Ti = 22, Mn = 25)
Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the hig...
Among the following series of transition metal ions, the one where all metal ions have 3d2 electronic configuration is [At. Nos. Ti = 22, V = 23, Cr ...
lanthanoids are
Which one of the following characteristics of the transition metals is associated with their catalytic activity?
The basic character of the transition metal monoxides follows the order (Atomic no's. Ti = 22, V = 23, Cr = 24, Fe = 26)
The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is (Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71)...
General electronic configuration of lanthanides is
Which of the following shows maximum number of oxidation states?
An atom has electronic configuration 1s2 2s2 2p6 3s2 3p6 3d3 4s2, you will place it in ...
Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because
Which of the following statement is not correct?
The most convenient method to protect the button of ship made of iron is
Which ion is colourless?
Which of the following shows maximum number of oxidation states?
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