JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
Which of the following is not formed when \(H_2S\) reacts with acidic \(K_2Cr_2O_7\) solution ?
- A \(CrSO_4\)
- B \(Cr_2(SO_4)_3\)
- C \(K_2SO_4\)
- D \(S\)
Answer & Solution
Correct Answer
(A) \(CrSO_4\)
Step-by-step Solution
Detailed explanation
\(K_2Cr_2O_7+ 4H_2SO_4+ 3H_2S\) \(\longrightarrow\) \(K_2SO_4 + Cr_2 (SO_4)_3 + 7H_2O + 3S\)
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
- Three moles of an ideal gas are compressed isothermally from \(60 \mathrm{~L}\) to \(20 \mathrm{~L}\) using constant pressure of \(5 \mathrm{~atm}\). Heat exchange \(Q\) for the compression is _______ Lit. atm.JEE Mains 2024 Medium
- The ascending acidity order of the following \(\mathrm{H}\) atoms is _______.
JEE Mains 2024 Hard - Consider all the structural isomers with molecular formula \(C _5 H _{11} Br\) are separately treated with KOH (aq) to give respective substitution products, without any rearrangement. The number of products which can exhibit optical isomerism from these is_________ .JEE Mains 2026 Hard
- Given Below are Two statement
JEE Mains 2022 Medium - Concentrated nitric acid is labelled as \(75 \%\) by mass. The volume in mL of the solution which contains 30 g of nitric acid is _______.
Given : Density of nitric acid solution is \(1.25 \mathrm{~g} / \mathrm{mL}\).JEE Mains 2025 Medium - The gas phase reaction \(2 A ( g ) \rightleftharpoons A _{2}( g )\) at \(400\, K\) has \(\Delta G ^{\circ}=+25.2\, kJ mol ^{-1}\). The equilibrium constant \(K _{ C }\) for this reaction is \(...... \times 10^{-2}\). (Round off to the Nearest integ \(\left[\right.\) Use \(: R=8.3\, J mol ^{-1} K ^{-1}, \ln 10=2.3\) \(\left.\log _{10} 2=0.30,1\, atm =1\, bar \right]\) \([\) antilog \((-0.3)=0.501]\)JEE Mains 2021 Medium
More PYQs from JEE Mains
- A coil having \(100\) turns, area of \(5 \times 10^{-3} \mathrm{~m}^2\), carrying current of \(1 \mathrm{~mA}\) is placed in uniform magnetic field of \(0.20 \mathrm{~T}\) such a way that plane of coil is perpendicular to the magnetic field. The work done in turning the coil through \(90^{\circ}\) is _______ \(\mu \mathrm{J}\).JEE Mains 2024 Hard
- Let \(\lambda \in R , \vec{a}=\lambda \hat{i}+2 \hat{j}-3 \hat{k}, \vec{b}=\hat{i}-\lambda \hat{j}+2 \hat{k}\) If \(((\vec{a}+\vec{b}) \times(\vec{a} \times \vec{b})) \times(\vec{a}-\vec{b})=8 \hat{i}-40 \hat{j}-24 \hat{k}\), then \(|\lambda(\vec{a}+\vec{b}) \times(\vec{a}-\vec{b})|^2\) is equal toJEE Mains 2023 Hard
- 3, 3-Dimethyl-2-butanol cannot be prepared by:
Choose the correct answer from the options given below :JEE Mains 2026 Easy - Given below are two statements:
Statement-\(I\): Since fluorine is more electronegative than nitrogen, the net dipole moment of \(\mathrm{NF}_3\) is greater than \(\mathrm{NH}_3\).
Statement-\(II\): In \(\mathrm{NH}_3\), the orbital dipole due to lone pair and the dipole moment of \(\mathrm{NH}\) bonds are in opposite direction, but in \(\mathrm{NF}_3\) the orbital dipole due to lone pair and dipole moments of \(N-F\) bonds are in same direction.
In the light of the above statements. Choose the most appropriate from the options given below.JEE Mains 2024 Hard - Match List-I with List-II.
List-I List-II A. \(\sin^2 \omega t\) I. Periodic with time period \(T = \dfrac{\pi}{\omega}\) but not simple harmonic motion (SHM) B. \(\sin^3(2\omega t)\) II. Periodic with time period \(T = \dfrac{2\pi}{\omega}\) but Not SHM C. \(\sin(\omega t) + \cos(\pi \omega t)\) III. Periodic with time period \(T = \dfrac{\pi}{\omega}\) and SHM D. \(\cos\omega t + \cos 2\omega t\) IV. Non-periodic
Choose the correct answer from the options given below :JEE Mains 2026 Hard - A uniform disc of radius \(R\) and mass \(M\) is free to rotate only about its axis. A string is wrapped over its rim and a body of mass \(m\) is tied to the free end of the string as shown in the figure. The body is released from rest. Then the acceleration of the body is
JEE Mains 2017 Hard