JEE Mains · Chemistry · STD 11 - 8.3. Organic chemistry purification and characterization
The transformation occurring in Duma's method is given below : \(\mathrm{C}_{2} \mathrm{H}_{7} \mathrm{~N}+\left(2 \mathrm{x}+\frac{\mathrm{y}}{2}\right) \mathrm{CuO} \rightarrow \mathrm{x\,CO}_{2}+\frac{y}{2} \mathrm{H}_{2} \mathrm{O}+\frac{\mathrm{z}}{2} \mathrm{~N}_{2}+\left(2\, \mathrm{x}+\frac{\mathrm{y}}{2}\right) \mathrm{Cu}\) The value of \(y\) is ...... .(Integer answer)
- A \(2\)
- B \(7\)
- C \(1\)
- D \(15\)
Answer & Solution
Correct Answer
(B) \(7\)
Step-by-step Solution
Detailed explanation
\mathrm{C}_{2} \mathrm{H}_{7} \mathrm{~N}+\left(2 \mathrm{x}+\frac{\mathrm{y}}{2}\right) \mathrm{CuO} \rightarrow \mathrm{x} \mathrm{CO}_{2}+\frac{\mathrm{y}}{2} \mathrm{H}_{2} \mathrm{O}+\frac{\mathrm{z}}{2} \mathrm{~N}_{2}+\left(2 \mathrm{x}+\frac{\mathrm{y}}{2}\right)…
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
- When concentrated \(HCl\) is added to an aqueous solution of \(CoCl_2\), its colour changes from reddish pink to deep blue . Which complex ion gives blue colour in this reaction?JEE Mains 2015 Hard
- 500 J of energy is transferred as heat to 0.5 mol of Argon gas at 298 K and 1.00 atm. The final temperature and the change in internal energy respectively are:
Given : \(\mathrm{R}=8.3 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\)JEE Mains 2025 Easy - The Azimuthal quantum number for the valence electrons of \(\mathrm{Ga}^{+}\)ion is \(.....\) (Atomic number of \(\mathrm{Ga}=31\) )JEE Mains 2021 Medium
- \(B\) has a smaller first ionization enthalpy than \(Be\). Consider the following statements : \((I)\) It is easier to remove \(2 \mathrm{p}\) electron than \(2 \mathrm{s}\) electron \((II)\) \(2 \mathrm{p}\) electron of \(\mathrm{B}\) is more shielded from the nucleus by the inner core of electrons than the \(2 s\) electrons of \(Be.\) \((III)\; 2 s\) electron has more penetration power than \(2 \mathrm{p}\) electron. \((IV)\) atomic radius of \(\mathrm{B}\) is more than \(\mathrm{Be}\) (Atomic number \(\mathrm{B}=5, \mathrm{Be}=4\) ) The correct statements areJEE Mains 2020 Hard
- The following concentrations were observed at \(500 \mathrm{~K}\) for the formation of \(\mathrm{NH}_3\) from \(\mathrm{N}_2\) and \(\mathrm{H}_2\). At equilibrium: \(\left[\mathrm{N}_2\right]=2 \times 10^{-2} \mathrm{M},\left[\mathrm{H}_2\right]=3 \times 10^{-2} \mathrm{M}\) and \(\left[\mathrm{NH}_3\right]=1.5 \times 10^{-2} \mathrm{M}\). Equilibrium constant for the reaction is ________.JEE Mains 2024 Hard
- In the Hoffmann bromamide degradation reaction, the number of moles of \(NaOH\) and \(Br_2\) used per mole of amine produced are :JEE Mains 2016 Medium
More PYQs from JEE Mains
- For the given logic gate circuit, which of the following is the correct truth table?
JEE Mains 2026 Medium - The number of solutions of the equation \(\cos 2 \theta \cos \frac{\theta}{2}+\cos \frac{5 \theta}{2}=2 \cos ^3 \frac{5 \theta}{2}\) in \(\left[-\frac{\pi}{2}, \frac{\pi}{2}\right]\) is :JEE Mains 2025 Medium
- The value of the integral \(\int_{-\pi/4}^{\pi/4}\left(\dfrac{32\cos^4 x}{1 + e^{\sin x}}\right)dx\) is:JEE Mains 2026 Medium
- The angle of elevation of the top of a vertical tower from a point \(A\), due east of it is \(45^o\) . The angle of elevation of the top of the same tower from a point \(B\). due south of \(A\) is \(30^o\). If the distance between \(A\) and \(B\) is \(54\sqrt 2 \,m\), then the height of the tower (in metres), isJEE Mains 2016 Hard
- Let \(a_1=1, a_2, a_3, a_4, \ldots\). be consecutive natural numbers. Then \(\tan ^{-1}\left(\frac{1}{1+ a _1 a _2}\right)+\tan ^{-1}\left(\frac{1}{1+ a _2 a _3}\right)\) \(+\ldots . .+\tan ^{-1}\left(\frac{1}{1+ a _{2021} a _{2022}}\right)\) is equal toJEE Mains 2023 Hard
- If the shortest distance between the lines \(\frac{\mathrm{x}-\lambda}{2}=\frac{\mathrm{y}-4}{3}=\frac{\mathrm{z}-3}{4}\) and \(\frac{x-2}{4}=\frac{y-4}{6}=\frac{z-7}{8}\) is \(\frac{13}{\sqrt{29}}\), then a value of \(\lambda\) is :JEE Mains 2024 Hard