JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
Treatment of a gas '\(X\)' with a freshly prepared ferrous sulphate solution gives a compound '\(Y\)' as a brown ring. The compounds \(X\) and \(Y\) are.
- A NO and \([\text{Fe(NO)}]\text{SO}_4\)
- B NO\(_2\) and \([\text{Fe(NO}_2)]\text{SO}_4\)
- C N\(_2\)O and \([\text{Fe(N}_2\text{O})]\text{SO}_4\)
- D N\(_2\)O\(_4\) and \([\text{Fe(N}_2\text{O}_4)]\text{SO}_4\)
Answer & Solution
Correct Answer
(A) NO and \([\text{Fe(NO)}]\text{SO}_4\)
Step-by-step Solution
Detailed explanation
The brown ring test is used for the detection of nitrate (\(\text{NO}_3^-\)) or nitrite (\(\text{NO}_2^-\)) ions. In this test, nitric oxide (NO) gas is evolved which reacts with the freshly prepared ferrous sulphate (\(\text{FeSO}_4\)) solution to form a brown ring of nitroso…
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
- Considering the basic strength of amines in aqueous solution, which one has the smallest \(pK_b\) value ?JEE Mains 2014 Medium
- In the following reactions, the total number of oxygen atoms in \(X\) and \(Y\) is \(........\). \(Na _2 O + H _2 O \rightarrow 2 X\) \(Cl _2 O _7+ H _2 O \rightarrow 2 Y\)JEE Mains 2023 Hard
- Given below are two statements:
Statement I: The number of species among \( BF_{4}^{-}, SiF_{4}, XeF_{4} \) and \( SF_{4} \), that have unequal E-F bond lengths is two. Here, E is the central atom.
Statement II: Among \(O _2^{-}, O _2^{2-}, F _2\) and \(O _2^{+}, O _2^{-}\)has the highest bond order.
In the light of the above statements, choose the correct answer from the options given belowJEE Mains 2026 Medium - The correct match between Item \(I\) and Item \(II\) is
Item \(I\) Item \(II\) \(A\) Ester test \(P\) Tyr \(B\) Carbylamine test \(Q\) Asp \(C\) Phthalein dye test \(R\) Ser \(S\) Lys JEE Mains 2019 Hard - Arrange the following resultant mixtures in increasing order of their pH values
A. \(10\) mL \(0.2\) M Ca(OH)\(_2\) + \(25\) mL \(0.1\) M HCl
B. \(10\) mL \(0.01\) M H\(_2\)SO\(_4\) + \(10\) mL \(0.01\) M Ca(OH)\(_2\)
C. \(10\) mL \(0.1\) M H\(_2\)SO\(_4\) + \(10\) mL \(0.1\) M KOH
Choose the correct answer from the options given below:JEE Mains 2026 Hard - The equilibrium constant for the reaction \(Zn ( s )+ Sn ^{2+}( aq ) \rightleftharpoons Zn ^{2+}( aq )+ Sn ( s )\) is \(1 \times 10^{20}\) at \(298 K\). The magnitude of standard electrode potential of \(Sn / Sn ^{2+}\) if \(E _{ Zn ^{2+/ / nn }}^0=-0.76 V\) is \(............\times 10^{-2}\,V\). (Nearest integer) Given : \(\frac{2.303 RT }{ F }=0.059\,V\)JEE Mains 2023 Medium
More PYQs from JEE Mains
- A \(6.50\) molal solution of \(KOH\) \((aq.)\) has a density of \(1.89\, g\, cm ^{-3}\). The molarity of the solution is .......... \(mol\, dm ^{-3} .\) (Round off to the Nearest Integer). [Atomic masses: \(K : 39.0\, u ; O : 16.0 \,u ; H : 1.0\, u ]\)JEE Mains 2021 Medium
- A particle of mass \(M\) originally at rest is subjected to a force whose direction is constant but magnitude varies with time according to the relation \(F=F_{0}\left(1-\left(\frac{t-T}{T}\right)^{2}\right)\) Where \(F_{0}\) and \(T\) are constants. The force acts only for the time internal \(2 T\). The velocity \(v\) of the particle after time \(2 {T}\) is -JEE Mains 2021 Hard
- The molar conductivity of a weak electrolyte when plotted against the square root of its concentration, which of the following is expected to be observed ?JEE Mains 2025 Medium
- Let \( C_{r} \) denote the coefficient of \( x^{r} \) in the binomial expansion of \( (1+x)^{n} \),\(n \in N , 0 \leq r \leq n\). If \( P_{n}=C_{0}-C_{1}+\frac{2^{2}}{3}C_{2}-\frac{2^{3}}{4}C_{3}+....+\frac{(-2)^{n}}{n+1}C_{n}, \) then the value of \( \sum_{n=1}^{25}\frac{1}{P_{2n}} \) equals.JEE Mains 2026 Hard
- 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 - A committee of \(4\) persons is to be formed from \(2\) ladies, \(2\) old men and \(4\) young men such that it includes at least \(1\) lady, at least \(1\) old man and at most \(2\) young men. Then the total number of ways in which this committee can be formed isJEE Mains 2013 Hard