General Organic Chemistry

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: [6] Annulene, [8] Annulene and cis-[10] Annulene, are respectively aromatic, not-aromatic and aromatic.

Reason R: Planarity is one of the requirements of aromatic systems.

In the light of the above statements, choose the most appropriate answer from the options given below.

In Carius method of estimation of halogen, 0.45 g of an organic compound gave 0.36 g of AgBr. Find out the percentage of bromine in the compound.

(Molar masses : AgBr = 188 g mol$^{-1}$; Br = 80 g mol$^{-1}$)

Match List - I with List - II.

Choose the correct answer from the options given below :

Match List - I with List - II.

Choose the correct answer from the options given below :

Among the following marked proton of which compound shows lowest $\mathrm pK_a$ value ?

On complete combustion of 0.492 g of an organic compound containing C, H and O, 0.7938 g of $\mathrm{CO_2}$ and 0.4428 g of $\mathrm{H_2O}$ was produced. The % composition of oxygen in the compound is ______.

The major product in the given reaction is

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R

Assertion A : Thin layer chromatography is an adsorption chromatography.

Reason R : A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent.

In the light of the above statements, choose the correct answer from the options given below

A sample of 0.125g of an organic compound when analyzed by Duma's method yields 22.78 mL of nitrogen gas collected over KOH solution at 280 K and 759 mm Hg. The percentage of nitrogen in the given organic compound is ______. (Nearest integer)

Given :

(a) The vapour pressure of water of 280 K is 14.2 mm Hg.

(b) R = 0.082 L atm K$^{-1}$ mol$^{-1}$

Which among the following is the strongest Bronsted base ?

Correct structure of γ-methylcyclohexane carbaldehyde is

Glycerol can be separated from spent-lye on industrial scale by using

Which of the following is unstable?

The reaction of $\mathbf Q$ with PhSNa yields an organic compound (major product) that gives positive Carius test on treatment with $\ce{Na2O2}$ followed by addition of $\ce{BaCl2}$. The correct option(s) for $\mathbf Q$ is(are)

The maximum number of possible isomers (including stereoisomers) which may be formed on mono-bromination of 1-methylcyclohex-1-ene using $\ce{Br2}$ and UV light is ____.

Correct match of the C-H bonds (shown in bold) in Column J with their BDE in Column K is

Column J: Molecule	Column K: BDE (kcal mol$^{-1}$)
(P) $\mathbf{H{-}C}\mathrm{H(CH_3)_2}$	(i) 132
(Q) $\mathbf{H{-}C}\mathrm{H_2Ph}$	(ii) 110
(R) $\mathbf{H{-}C}\mathrm{H{=}CH_2}$	(iii) 95
(S) $\mathbf{H{-}C}{\equiv}\mathrm{CH}$	(iv) 88

For the following reaction
$$\ce{CH4(g) + Cl2(g) ->[light] CH3Cl(g) + HCl(g)}$$
the correct statement is

What is the major product formed by HI on reaction with $\mathrm{(CH_3)_3C{-}CH{=}CH_2}$ ?

What is the final product (major) 'A' in the given reaction ?

Which one of the following structures has the IUPAC name 3-ethynyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid?