JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The correct set of ions (aqueous solution) with same colour from the following is which?
- A \(\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}, \mathrm{Cr}^{2+}\)
- B \(\mathrm{V}^{2+}, \mathrm{Cr}^{3+}, \mathrm{Mn}^{3+}\)
- C \(\mathrm{Ti}^{4+}, \mathrm{V}^{4+}, \mathrm{Mn}^{2+}\)
- D \(\mathrm{Zn}^{2+}, \mathrm{V}^{3+}, \mathrm{Fe}^{3+}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{V}^{2+}, \mathrm{Cr}^{3+}, \mathrm{Mn}^{3+}\)
Step-by-step Solution
Detailed explanation
(1) \(\mathrm{V}^{2+}\) (Violet), \(\mathrm{Cr}^{3+}\) (Violet), \(\mathrm{Mn}^{3+}(\) Violet \()\) (2) \(\mathrm{Zn}^{2+}\) (Colourless), \(\mathrm{V}^{3+}\) (Green), \(\mathrm{Fe}^{3+}\) (Yellow) (3) \(\mathrm{Ti}^{4+}\) (Colourless), \(\mathrm{V}^{4+}\) (Blue),…
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
- To find the standard potential of \(M^{3+}/M\) electrode, the following cell is constituted : \(Pt/ M/M^{3+}(0.001 \,mol\, L^{ -1})/Ag^+(0.01\, mol\, L^{-1})/Ag\) The emf of the cell is found to be \(0.421\, volt\) at \(298\, K\). The standard potential of half reaction \(M^{3+} + 3e \to M\) at \(298\, K\) will be .............. \(\mathrm{volt}\) (Given \(E_{A{g^ + }/Ag}^o \) at \(298\, K\, = 0.80\, Volt\) )JEE Mains 2017 Hard
- Rate of dehydration of alcohols follows the orderJEE Mains 2013 Hard
- The correct statement on the isomerism associated with the following complex ions, \((A)\,\,\,\,[Ni(H_2O)_5NH_3]^{2+},\)
\((B)\,\,\,\,[Ni(H_2O)_4(NH_3)_2]^{2+}\) and
\((C)\,\,\,\,[Ni(H_2O)_3(NH_3)_3]^{2+}\) isJEE Mains 2015 Hard - What is the ratio of wave number of first line (lowest energy line) of Balmer series of H atomic spectrum to first line of its Brackett series?JEE Mains 2026 Medium
- Reaction \(\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{~B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})\) is a first order reaction. It was started with pure A
t / min Pressure of system
at time t / mm Hg10 160 ∞ 240
Which of the following option is incorrect?JEE Mains 2025 Easy - During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in \(NH _4 OH\) solution when sodium carbonate extract was first acidified with dil. \(HNO _3\) and then \(AgNO _3\) solution was added. This indicates presence of _______.JEE Mains 2024 Medium
More PYQs from JEE Mains
- The increasing order of diazotisation of the following compounds is
JEE Mains 2018 Hard - Consider two sets \(A\) and \(B\), each containing three numbers in A.P. Let the sum and the product of the elements of A be 36 and p respectively and the sum and the product of the elements of B be 36 and q respectively. Let d and D be the common differences of AP's in A and B respectively such that \(D=d+3, d \gt 0\). If \(\frac{p+q}{p-q}=\frac{19}{5}\), then \(p-q\) is equal toJEE Mains 2025 Medium
- Match the LIST-I with LIST-II
LIST-I
(Name reaction)LIST-II
(Product obtainable)(A) Swarts reaction (I) Ethyl benzene (B) Sandmeyer's reaction (II) Ethyl iodide (C) Wurtz Fittig reaction (III) Cyanobenzene (D) Finkelstein reaction (IV) Ethyl fluoride
Choose the correct answer from the options given below:JEE Mains 2025 Easy - Statement \(-1\) : The slope of the tangent at any point \(P\) on a parabola, whose axis is the axis of \(x\) and vertex is at the origin, is inversely proportional to the ordinate of the point \(P\).
Statement \(-2\) : The system of parabolas \(y^2 = 4ax\) satisfies a differential equation of degree \(1\) and order \(1\)JEE Mains 2013 Hard - If a solid sphere of mass \(5\,kg\) and a disc of mass \(4\,kg\) have the same radius. Then the ratio of moment of inertia of the disc about a tangent in its plane to the moment of inertia of the sphere about its tangent will be \(\frac{x}{7}\). The value of \(x\) is \(.........\)JEE Mains 2023 Medium
- The IUPAC name of the following compound is _______.-
JEE Mains 2025 Easy