List of top Chemistry Questions on Organic Chemistry- Some Basic Principles and Techniques asked in JEE Advanced

The option(s) with correct sequence of reagents for the conversion of P to Q is(are)

A trinitro compound, 1,3,5-tris-(4-nitrophenyl)benzene, on complete reaction with an excess of Sn/HCl gives a major product, which on treatment with an excess of NaNO₂/HCl at 0°C provides P as the product. P, upon treatment with excess of H₂O at room temperature, gives the product Q. Bromination of Q in aqueous medium furnishes the product R. The compound P upon treatment with an excess of phenol under basic conditions gives the product S. The molar mass difference between compounds Q and R is 474 g mol^–1 and between compounds P and S is 172.5 g mol^–1. The number of heteroatoms present in one molecule of R is ______ . 
[Use: Molar mass (in g mol^–1): H = 1, C = 12, N = 14, O = 16, Br = 80, Cl = 35.5 Atoms other than C and H are considered as heteroatoms]

50 mL of 0.2 molal urea solution (density = 1.012 g mL⁻¹ at 300 K) is mixed with 250 mL of a solution containing 0.06 g of urea. Both solutions were prepared in the same solvent. The osmotic pressure (in Torr) of the resulting solution at 300 K is ___. 
[Use: Molar mass of urea = 60 g mol⁻¹ ; gas constant, R = 62 L Torr K⁻¹ mol⁻¹; Assume, Δ_mixH = 0, Δ_mixV = 0]

50 mL of 0.2 molal urea solution (density = 1.012 g mL⁻¹ at 300 K) is mixed with 250 mL of a solution containing 0.06 g of urea. Both solutions were prepared in the same solvent. The osmotic pressure (in Torr) of the resulting solution at 300 K is ___. 
[Use: Molar mass of urea = 60 g mol⁻¹ ; gas constant, R = 62 L Torr K⁻¹ mol⁻¹; Assume, Δ_mixH = 0, Δ_mixV = 0]

Plotting \(\frac{1}{Λ_{m}}\) against \(cΛ_{m}\) for aqueous solutions of a monobasic weak acid (HX) resulted in a straight line with y-axis intercept of P and slope of S. The ratio \(\frac{P}{S}\) is 
[\(Λ_{m}\) = molar conductivity, 
\(Λ^{o}_{m}\)= limiting molar conductivity, 
\(c\) = molar concentration, 
\(K_{a}\) = dissociation constant of HX]

The total number of \(sp^2\) hybridised carbon atoms in the major product P (a non-heterocyclic compound) of the following reaction is ___.

A trinitro compound, 1,3,5-tris-(4-nitrophenyl)benzene, on complete reaction with an excess of Sn/HCl gives a major product, which on treatment with an excess of NaNO₂/HCl at 0^oC provides P as the product. P, upon treatment with excess of H₂O at room temperature, gives the product Q. Bromination of Q in aqueous medium furnishes the product R. The compound P upon treatment with an excess of phenol under basic conditions gives the product S. The molar mass difference between compounds Q and R is 474 g mol^–1 and between compounds P and S is 172.5 g mol^–1. The total number of carbon atoms and heteroatoms present in one molecule of S is ______ . 
[Use: Molar mass (in g mol^–1): H = 1, C = 12, N = 14, O = 16, Br = 80, Cl = 35.5 Atoms other than C and H are considered as heteroatoms] 

A trinitro compound, 1,3,5-tris-(4-nitrophenyl)benzene, on complete reaction with an excess of Sn/HCl gives a major product, which on treatment with an excess of NaNO₂/HCl at 0°C provides P as the product. P, upon treatment with excess of H₂O at room temperature, gives the product Q. Bromination of Q in aqueous medium furnishes the product R. The compound P upon treatment with an excess of phenol under basic conditions gives the product S. The molar mass difference between compounds Q and R is 474 g mol^–1 and between compounds P and S is 172.5 g mol^–1.

A trinitro compound, 1,3,5-tris-(4-nitrophenyl)benzene, on complete reaction with an excess of Sn/HCl gives a major product, which on treatment with an excess of NaNO₂/HCl at 0°C provides P as the product. P, upon treatment with excess of H₂O at room temperature, gives the product Q. Bromination of Q in aqueous medium furnishes the product R. The compound P upon treatment with an excess of phenol under basic conditions gives the product S. The molar mass difference between compounds Q and R is 474 g mol^–1 and between compounds P and S is 172.5 g mol^–1. The number of heteroatoms present in one molecule of R is ______ . 
[Use: Molar mass (in g mol^–1): H = 1, C = 12, N = 14, O = 16, Br = 80, Cl = 35.5 Atoms other than C and H are considered as heteroatoms]

“PARAGRAPH II” A trinitro compound, 1,3,5-tris-(4-nitrophenyl)benzene, on complete reaction with an excess of Sn/HCl gives a major product, which on treatment with an excess of NaNO₂/HCl at 0^oC provides P as the product. P, upon treatment with excess of H₂O at room temperature, gives the product Q. Bromination of Q in aqueous medium furnishes the product R. The compound P upon treatment with an excess of phenol under basic conditions gives the product S. The molar mass difference between compounds Q and R is 474 g mol^–1 and between compounds P and S is 172.5 g mol^–1. The total number of carbon atoms and heteroatoms present in one molecule of S is ______ . 
[Use: Molar mass (in g mol^–1): H = 1, C = 12, N = 14, O = 16, Br = 80, Cl = 35.5 Atoms other than C and H are considered as heteroatoms] 

Considering the following reaction sequence, the correct statement(s) is(are)

Considering the following reaction sequence, the correct statement(s) is(are)

Correct option(s) for the following sequence of reactions is(are)

In the following reaction, compound Q is obtained from compound P via an ionic intermediate.

|What is the degree of unsaturation of Q?

The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to

Upon treatment with ammoniacal $H_2 S$, the metal ion that precipitates as a sulphide is

Passing $H_2 S$ gas into a mixture of $Mn^{2+}, Ni^{2+}, Cu^{2+}$ and $Hg^{2+}$ ions in an acidified aqueous solution precipitates

The correct stability order of the following resonance structure is (I) $H_2C = _{N}^{+} = _{N}^{-} \, \, \, \, $ (II) $ H_2 \, _{C}^{+} - N = _{N}^{-}$ (c) $H_2 \, _{C}^{-} - _{N}^{+} = N \, \, \, \, $ (IV) $H_2 {C}^{-} - N = N $

In the following carbocation; $H/CH_3$ that is most likely to migrate to the positively charged carbon is

The correct stability order for the following species is