General Organic Chemistry

The formula of the purple colour formed in Laissaigne's test for sulphur using sodium nitroprusside is

In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is ______% (nearest integer)

(Relative atomic masses of Ag and Br are 108u and 80u, respectively).

The correct IUPAC name of the following compound is :

The major product (P) of the given reaction is (where, Me is $-\mathrm{CH_3}$)

The complete combustion of 0.492 g of an organic compound containing 'C', 'H' and 'O' gives 0.793g of $\mathrm{CO_2}$ and 0.442 g of $\mathrm{H_2O}$. The percentage of oxygen composition in the organic compound is ______. (nearest integer)

The major product of the following reaction contains ______ bromine atom(s).

Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of the compound neutralised 12.5 mL of 1 M $\mathrm{H_2SO_4}$ solution. The percentage of nitrogen in the compound is ______. (Nearest integer)

Which of the following carbocations is most stable?

$$\mathrm{C_6H_6+CH_3CH_2CH_2Cl\xrightarrow{Anhydrous,\ AlCl_3}\ 'A'\ (Major\ Product)}$$

The stable carbocation formed in the above reaction is

TLC analysis of a mixture having 3 components (A, B, C) using silica gel as the stationary phase gave following $R_f$ values; for A = 0.72, B = 0.48, C = 0.20.

Regarding the above observations, which one of the following statements is not correct for column chromatography of the mixture ?

An organic compound with 51.6% sulfur is heated in a Carius tube. The amount of this compound which will form 0.752 g of barium sulphate is ______ $\times10^{-1}$ g.

(Given molar mass of barium sulphate 233 g mol$^{-1}$) (Nearest integer).

While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.25 g of the compound neutralized 2.5 mL of 2 M $\mathrm{H_2SO_4}$. The percentage of nitrogen present in organic compound is ______.

Major product of the following reaction is

Arrange the following in decreasing acidic strength.

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the base line are 3.25 cm, 2.08 cm and 1.05 cm, respectively. The ratio of $R_f$ values of A to B is ______.

Which technique among the following, is most appropriate in separation of a mixture of 100 mg of $p$-nitrophenol and picric acid ?

Which of the following compounds is not aromatic ?

The correct stability order of the following diazonium salt is

The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of nomenclature is

Which of the following is not an example of benzenoid compound?