JEE Mains · Chemistry · STD 12 -8.1. Aldehydes and ketones
The compounds which give positive Fehling's test are :
(A)
(B)
(C) \(\mathrm{HOCH}_2-\mathrm{CO}-(\mathrm{CHOH})_3-\mathrm{CH}_2-\mathrm{OH}\)
(D)
(E)
Choose the correct answer from the options given below :
- A (A), (D) and (E) Only
- B (C), (D) and (E) Only
- C (A), (C) and (D) Only
- D (A), (B) and (C) Only
Answer & Solution
Correct Answer
(B) (C), (D) and (E) Only
Step-by-step Solution
Detailed explanation
All gives positive Fehling test
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
- \(40\, \mathrm{~g}\) of glucose (Molar mass \(=180\) ) is mixed with \(200\, \mathrm{~mL}\) of water. The freezing point of solution is \(.....\,\mathrm{K}\). (Nearest integer) [Given : \(\mathrm{K}_{\mathrm{f}}=1.86 \,\mathrm{~K} \,\mathrm{~kg} \,\mathrm{~mol}^{-1} ;\) Density of water \(=\) \(1.00 \,\mathrm{~g}\, \mathrm{~cm}^{-3} ;\) Freezing point of water \(\left.=273.15\, \mathrm{~K}\right]\)JEE Mains 2021 Medium
- Oxidation of toluene to Benzaldehyde can be easily carried out with which of the following reagents?JEE Mains 2022 Easy
- Given \(C_{(graphite)} +O_2(g) \rightarrow CO_2(g)\,;\) \(\Delta _rH^o=-395.5 \, kJ\,mol^{-1}\) \(H_2 (g) + \frac{1}{2} O_2 (g) \rightarrow H_2O(l)\,;\) \(\Delta _rH^o =-285.8\, kJ\, mol^{-1}\) \(CO_2(g) + 2H_2O(l) \rightarrow CH_4(g) + 2O_2(g)\,;\) \(\Delta _rH^o = + 890.3\, kJ\, mol^{-1}\) Based on the above thermochemical equations, the value of, \(\Delta _rH^o \) at \(298\, K\) for the reaction \(C_{(graphite)} + 2H_2(g) \rightarrow CH_4(g) \) will be for \(\Delta_{r} H^{\circ}\) ........... \(kJ \,mol^{-1}\)JEE Mains 2017 Hard
- A group \(13\) element \('X'\) reacts with chlorine gas to produce a compound \(XCl_3. XCl_3\) is electron deficient and easily reacts with \(NH_3\) to form \(Cl_3X \leftarrow NH_3\) adduct, however, \(XCl_3\) does not dimerize. \(X\) isJEE Mains 2018 Hard
- The oxidation states of iron atoms in compounds \((A),\) \((B)\) and \((C),\) respectively, are \(x,\) \(y\) and \(z.\) The sum of \(x, y\) and \(z\) is........ \((A)\) \(\left. Na _{4}\left[ Fe ( CN )_{5} NOS \right)\right]\) \((B)\) \(Na _{4}\left[ FeO _{4}\right]\) \((C)\) \(\left[ Fe _{2}( CO )_{9}\right]\)JEE Mains 2020 Medium
- Complexes \(\left(\mathrm{ML}_{5}\right)\) of metals \(\mathrm{Ni}\) and \(Fe\) have ideal square pyramidal and trigonal bipyramidal grometries, respectively. The sum of the \(90^{\circ}, 120^{\circ}\) and \(180^{\circ}\;\; \mathrm{L}-\mathrm{M}- \mathrm{L}\) angles in the two complexes isJEE Mains 2020 Hard
More PYQs from JEE Mains
- The activity of a radioactive sample falls from \(700 \;\mathrm{s}^{-1}\) to \(500\; \mathrm{s}^{-1}\) in \(30\;min\). Its half life is close to.........\(min\)JEE Mains 2020 Medium
- Let \( A=\{2,3,5,7,9\} \). Let R be the relation on A defined by \(x\) Ry if and only if \( 2x\le3y \). Let \(l\) be the number of elements in R, and m be the minimum number of elements required to be added in R to make it a symmetric relation. Then \( l+m \) is equal to :JEE Mains 2026 Easy
- Let \(f\) be a twice differentiable function on \((1,6) .\) If \(f (2)=8, f ^{\prime}(2)=5, f ^{\prime}( x ) \geq 1\) and \(f ^{\prime \prime}( x ) \geq 4,\) for all \(x \in(1,6),\) thenJEE Mains 2020 Medium
- Decreasing order of the hydrogen bonding in following forms of water is correctly represented by
A. Liquid water
B. Ice
C. Impure waterJEE Mains 2023 Easy - A hydrogen atom in is ground state absorbs \(10.2\;eV\) of energy. The angular momentum of electron of the hydrogen atom will increase by the value of ............... \(\times 10^{-34} \; J {s}\) (Given, Plank's constant \(\left.=6.6 \times 10^{-34} Js \right)\)JEE Mains 2022 Medium
- Distance between an object and three times magnified real image is 40 cm . The focal length of the mirror used is _________ cm .JEE Mains 2026 Medium