During sodium nitroprusside test of sulphide ion in an aqueous solution, one of the ligands coordinated to the metal ion is converted to
Show Hint
- \( \text{NOS}^- \)
- \( \text{SCN}^- \)
- \( \text{SNO}^- \)
- \( \text{NCS}^- \)
The Correct Option is C
Solution and Explanation
Top Questions on Qualitative Analysis
The monomer (X) involved in the synthesis of Nylon 6,6 gives positive carbylamine test. If 10 moles of X are analyzed using Dumas method, the amount (in grams) of nitrogen gas evolved is ____. Use: Atomic mass of N (in amu) = 14
- JEE Advanced - 2025
- Chemistry
- Qualitative Analysis
The correct match of the group reagents in List-I for precipitating the metal ion given in List-II from solutions is:
List-I List-II (P) Passing H2S in the presence of NH4OH (1) Cu2+ (Q) (NH4)2CO3 in the presence of NH4OH (2) Al3+ (R) NH4OH in the presence of NH4Cl (3) Mn2+ (S) Passing H2S in the presence of dilute HCl (4) Ba2+
(5) Mg2+- JEE Advanced - 2025
- Chemistry
- Qualitative Analysis
Match List I with List II:
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Chemistry
- Qualitative Analysis
Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with
\(K_4\)[Fe(CN)\(_6\)] is : \[ {Cu}^{2+}, \, {Fe}^{3+}, \, {Ba}^{2+}, \, {Ca}^{2+}, \, {NH}_4^+, \, {Mg}^{2+}, \, {Zn}^{2+} \]- JEE Main - 2025
- Chemistry
- Qualitative Analysis
- Given below are two statements:
Statement I: In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds.
Statement II: The sodium fusion extract of an organic compound having N and S gives prussian blue colour with FeSO4 and Na4[Fe(CN)6].
In the light of the above statements, choose the correct answer from the options given below.- JEE Main - 2025
- Chemistry
- Qualitative Analysis
Questions Asked in JEE Advanced exam
Figure 1 shows the configuration of main scale and Vernier scale before measurement. Fig. 2 shows the configuration corresponding to the measurement of diameter $ D $ of a tube. The measured value of $ D $ is:
- JEE Advanced - 2025
- Units and measurement
A solid glass sphere of refractive index $ n = \sqrt{3} $ and radius $ R $ contains a spherical air cavity of radius $ \dfrac{R}{2} $, as shown in the figure. A very thin glass layer is present at the point $ O $ so that the air cavity (refractive index $ n = 1 $) remains inside the glass sphere. An unpolarized, unidirectional and monochromatic light source $ S $ emits a light ray from a point inside the glass sphere towards the periphery of the glass sphere. If the light is reflected from the point $ O $ and is fully polarized, then the angle of incidence at the inner surface of the glass sphere is $ \theta $. The value of $ \sin \theta $ is ____
- JEE Advanced - 2025
- Ray optics and optical instruments
- Let a complex number \(z\) satisfy the equation: \[ |z - z_1| = 2 |z - z_2|,\quad \text{where } z_1 = 1 + 2i,\ z_2 = 3i \] Then choose the correct options:
- JEE Advanced - 2025
- complex numbers
The center of a disk of radius $ r $ and mass $ m $ is attached to a spring of spring constant $ k $, inside a ring of radius $ R>r $ as shown in the figure. The other end of the spring is attached on the periphery of the ring. Both the ring and the disk are in the same vertical plane. The disk can only roll along the inside periphery of the ring, without slipping. The spring can only be stretched or compressed along the periphery of the ring, following Hooke’s law. In equilibrium, the disk is at the bottom of the ring. Assuming small displacement of the disc, the time period of oscillation of center of mass of the disk is written as $ T = \frac{2\pi}{\omega} $. The correct expression for $ \omega $ is ( $ g $ is the acceleration due to gravity):
- JEE Advanced - 2025
- Oscillations
In a scattering experiment, a particle of mass $ 2m $ collides with another particle of mass $ m $, which is initially at rest. Assuming the collision to be perfectly elastic, the maximum angular deviation $ \theta $ of the heavier particle, as shown in the figure, in radians is:
- JEE Advanced - 2025
- Elastic and inelastic collisions