JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The element which shows only one oxidation state other than its elemental form is _______.
- A Cobalt
- B Scandium
- C Titanium
- D Nickel
Answer & Solution
Correct Answer
(B) Scandium
Step-by-step Solution
Detailed explanation
Co, \(T i, N i\) can show \(+2,+3\) and +\(4\) oxidation state, But 'Sc' only shows +\(3\) stable oxidation state.
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
- The de Broglie wavelength \(\left( \lambda \right)\) associated with a photoelectron varies with the frequency \((v)\) of the incident radiation as, [\(v_0\) is threshold frequency]:JEE Mains 2019 Hard
- The comect order of melting points of hydrides of group \(16\) elements is \(...\)JEE Mains 2022 Easy
- In the ground state of atomic \(Fe \,( Z =26)\) the spin-only magnetic moment is ...... \(\times 10^{-1} \,BM\). (Round off to the Nearest Integer). \([\) Given \(: \sqrt{3}=1.73, \sqrt{2}=1.41]\)JEE Mains 2021 Easy
- Given below is the plot of the molar conductivity vs \(\sqrt{\text { concentration }}\) for KCl in aqueous solution.
If, for the higher concentration of KCl solution, the resistance of the conductivity cell is \(100 \Omega\), then the resistance of the same cell with the dilute solution is ' \(x\) ' \(\Omega\)
The value of \(x\) is __________ (Nearest integer)JEE Mains 2025 Hard - Compound \(A\) from the following reaction sequence is:
JEE Mains 2023 Medium - The wave number of the first emission line in the Balmer series of \(H-\) Spectrum is ( \(R =\) Rydberg constant)JEE Mains 2013 Medium
More PYQs from JEE Mains
- If \(f : R \rightarrow R\) be a continuous function satisfying \(\int \limits_0^{\pi / 2} f(\sin 2 x) \cdot \sin x d x+\alpha \int \limits_0^{\pi / 4} f(\cos 2 x) \cdot \cos x d x=0\)then \(\alpha\) is equal toJEE Mains 2023 Hard
- The recoil speed of a hydrogen atom after it emits a photon in going from \(n =5\) state to \(n =1\) state will be ..... \(m/s\)JEE Mains 2021 Hard
- Let \(f : R \rightarrow R\) be a function such that \(f(x)=\frac{x^2+2 x+1}{x^2+1}\). ThenJEE Mains 2023 Hard
- The variance of first \(50\) even natural numbers isJEE Mains 2014 Medium
- Let \(M\) be any \(3 \times 3\) matrix with entries from the set \(\{0,1,2\}\). The maximum number of such matrices, for which the sum of diagonal elements of \(M ^{ T } M\) is seven, is .............JEE Mains 2021 Medium
- Let \([t]\) denote the largest integer less than or equal to \(t\). If \(\int_0^3\left(\left[x^2\right]+\left[\frac{x^2}{2}\right]\right) d x=a+b \sqrt{2}-\sqrt{3}-\sqrt{5}+c \sqrt{6}-\sqrt{7},\) where \(a, b, c \in z\), then \(a+b+c\) is equal to ...........JEE Mains 2024 Hard