KCET · Chemistry · d and f Block Elements
The incorrect statement in respect of chromyl chloride test is
- A formation of red vapours
- B formation of lead chromate
- C formation of chromyl chloride
- D liberation of chlorine
Answer & Solution
Correct Answer
(D) liberation of chlorine
Step-by-step Solution
Detailed explanation
Chromyl chloride test is used for \(\mathrm{Cl}^{-}\)ions. Chlorine is not liberated in this test.
\(\mathrm{CrO}_{2} \mathrm{Cl}_{2}+4 \mathrm{NaOH} \longrightarrow 2 \mathrm{NaCl}+\mathrm{Na}_{2} \mathrm{CrO}_{4}+2 \mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{Na}_{2} \mathrm{CrO}_{4}+\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{~Pb} \longrightarrow 2 \mathrm{CH}_{3} \mathrm{COONa}+\underset{\text { lead chromate }}{\mathrm{PbCrO}_{4}}\)
\(\mathrm{CrO}_{2} \mathrm{Cl}_{2}+4 \mathrm{NaOH} \longrightarrow 2 \mathrm{NaCl}+\mathrm{Na}_{2} \mathrm{CrO}_{4}+2 \mathrm{H}_{2} \mathrm{O}\)
\(\mathrm{Na}_{2} \mathrm{CrO}_{4}+\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{~Pb} \longrightarrow 2 \mathrm{CH}_{3} \mathrm{COONa}+\underset{\text { lead chromate }}{\mathrm{PbCrO}_{4}}\)
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
- Which one of the following is not formed when a mixture of methyl bromide and bromobenzene is heated with sodium metal in the presence of dry ether?KCET 2012 Easy
- Sodium metal crystallizes in B.C.C. lattice with edge length of \( 4.29 \mathrm{~A} \). The radius of sodium
atom isKCET 2015 Medium - The electronic configuration of transition element " \( X \) ", is \( [A r] 3 d^{5} \), oxidation state is \( +3 \). What is
its atomic number?KCET 2018 Easy - Considering the reaction \(\mathrm{C}(s)+\mathrm{O}_{2}(g)\) \(\longrightarrow \mathrm{CO}_{2}(g)+393.5 \mathrm{~kJ}\) the signs of \(\Delta H, \Delta S\) and \(\Delta G\) respectively areKCET 2007 Easy
- A gas can be taken from A to B via two different paths ACB and ADB.
When path ACB is used, \(60\) J of heat flows into the system and \(30\) J of work is done by the system. If path ADB is used, work done by the system is \(10\) J.
The heat flow into the system in path ADB isKCET 2026 Medium - The general formula of a cycloalkane isKCET 2007 Easy
More PYQs from KCET
- If the area of the ellipse is \(\frac{x^{2}}{25}+\frac{y^{2}}{\lambda^{2}}=1\) is \(20 \pi\) sq units, then \(\lambda\) isKCET 2021 Medium
- A thick metal wire of density \(\rho\) and length \(L\) is hung from a rigid support. The increase in length of the wire due to its own weight is ( \(Y=\) Young's modulus of the material of the wire)KCET 2024 Medium
- A mixture of phenol and aniline shows negative deviation from Raoult's law. This is due to the formation ofKCET 2024 Medium
- 180 g of glucose, \(\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6\), is dissolved in 1 kg of water in a vessel. The temperature at which water boils at 1.013 bar is ______ (given, \(\mathrm{K}_{\mathrm{b}}\) for water is \(052 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\). Boiling point for pure water is 373.15 K )KCET 2025 Medium
- In a transistor, the collector current varies by \( 0.49 \mathrm{~mA} \) and emitter current varies by \( 0.50 \mathrm{~mA} \).
Current gain \( \beta \) measured isKCET 2016 Easy - An ionic compound is expected to have tetrahedral structure if \(r_{+} / r_{-}\)lies in the range ofKCET 2008 Medium