NEET · Chemistry · STD 12 - 4. d and f- block elements
Identify the Incorrect statement from the following
- A The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction
- B Zirconium and Hafnium have identical radii of \(160 \;pm\) and \(159 \;pm ,\) respectively as a consequence of lanthanoid contraction
- C Lanthanoids reveal only \(+3\) oxidation state
- D The lanthanoid ions other than the \(f^{0}\) type and the \(f^{14}\) type are all paramagnetic
Answer & Solution
Correct Answer
(C) Lanthanoids reveal only \(+3\) oxidation state
Step-by-step Solution
Detailed explanation
Lanthanoids can show +2 or +4 oxidation states in solution or in solid compounds. Most common oxidation state of Lanthanoids is +3 .
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Given below are two statements :
Statement I : Ferromagnetism is considered as an extreme form of paramagnetism.
Statement II: The number of unpaired electrons in a \(\text{Cr} ^{2+}\) ion \((\text{Z} =24)\) is the same as that of a \(\text{Nd} ^{3+}\) ion \((\text{Z}=60)\).
In the light of the above statements, choose the correct answer from the options given below :NEET 2025 Easy - Which reaction is \(NOT\) a redox reaction?NEET 2024 Medium
- Methane reacts with steam at 1273 K in the presence of nickel catalyst to form :NEET 2026 Easy
- Among halogens, the one which can oxidise water to oxygen is:NEET 2017 Medium
- The pair of electrons in the given carbanion, \(CH_3C \equiv C^-,\) is present in which of the following orbitals ?NEET 2016 Medium
- If the molar conductivity \(\left(\Lambda_{ m }\right)\) of a \(0.050 mol L ^{-1}\) solution of a monobasic weak acid is \(90 S cm ^2 mol^{-1}\), its extent (degree) of dissociation will be [Assume \(\Lambda_{+}^{\circ}=349.6 S cm ^2 mol^{-1}\) and \(\Lambda_{-}^{\circ}=50.4 S cm ^2 mol^{-1}\).]NEET 2025 Hard
More PYQs from NEET
- Consider the following statements regarding function of adrenal medullary hormones :
(A) It causes pupilary constriction.
(B) It is a hyperglycemic hormone.
(C) It causes piloerection.
(D) It increases strength of heart contraction.
Choose the correct answer from the options given below :NEET 2025 Medium - \(MY\) and \(NY_3,\) two nearly insoluble salts, have the same \(K_{sp} \) values of \(6.2 \times 10^{-13}\) at roomtemperature. Which statement would be true in regard to \(MY\) and \(NY_3\) ?NEET 2016 Hard
- The major product Z formed in the following sequence of reactions is :
\(C _2 H _6 \xrightarrow[\text { UV light }]{ Cl _2} X \xrightarrow{ NH _3} Y \xrightarrow[\text { (monochlorinated product) }]{\text { (i) } NaNO _2 / HCl \text { (ii) } H _2 O } Z\)NEET 2026 Medium - The displacement-time graphs of two moving particles make angles of \(30^{\circ}\) and \(45^{\circ}\) with the \(x\)-axis as shown in the figure. The ratio of their respective velocity is :
NEET 2022 Medium - The molecules of a given mass of a gas have \(r.m.s.\) velocity of \(200 \,m s^{-1}\) at \(27^o C\) and \(1.0 \times 10^5 \,Nm^{-2}\) pressure. When the temperature and pressure of the gas are respectively, \(127^o C\) and \(0.05 \times 10^5 \,Nm^{-2},\) the \(r.m.s.\) velocity of its molecules in \(m s^{-1}\) isNEET 2016 Medium
- Identify the substances having glycosidic bond and peptide bond, respectively in their structureNEET 2020 Easy