List of top Chemistry Questions on Methods Of Purification Of Organic Compounds

An organic compound is heated with \(Na_2O_2\) then boiled with \(HNO_3\). The solution is then treated with ammonium molybdate. The yellow precipitate obtained is due to the presence of the element
When 0.25 g of an organic compound is completely oxidised with excess oxygen, 0.22 g of \(CO_{2}\) is produced. What is the percentage of carbon in the compound?
IUPAC name of $(CH_3)_3C-CH_2Br$ is
In Carius method, $0.40\,g$ of an organic compound gave $0.188\,g$ of $AgBr$. The percentage of bromine in the compound is (Atomic mass of Ag = 108 g mol$^{-1}$ and Br = 80 g mol$^{-1}$)
Match the following
Methyl chloride - Antiseptic
Chloroform - Metal washing
Iodoform - Propellant
\( \text{CCl}_4 \) - Solvent for \( \text{I}_2 \)
The technique is used to purify liquid having very high b.p and decompose at or below this boiling point is
In carius method of estimation of 'Br' 1.53 gm of an organic compound gave 1 gm AgBr. The % of Br in organic compound is (At. mass of Ag and Br are 108 and 80 amu respectively)
Which of the following technique is used to separate chloroform and aniline?
‘Layer Test’ is used to identify
The best method for the separation of o-nitrophenol and p-nitrophenol from their mixture is:
Methods used for purification of organic compounds are based on :
In which of the following pairs, both molecules possess dipole moment?
Identify the method of preparation of a colloidal sol from the following:

Which of the following are general methods for the preparation of 1-iodopropane? 

Which of the following occurs with KMnO\(_4\) in neutral medium?
A flask contains 98 mg of H₂SO₄. If \( 3.01 \times 10^{20} \) molecules of H₂SO₄ are removed from the flask, the number of moles of H₂SO₄ remaining in the flask is (\( N = 6.02 \times 10^{23} \)):
Number of deactivating groups among: \( -Cl, -SO_3H, -OH, -NHC_2H_5, -COOCH_3, -CH_3 \)
Which of the following sets of reagents convert toluene to benzaldehyde? \includegraphics[]{158.png}
IUPAC names of the following compounds A and B are: \includegraphics[]{160.png}
Cobalt (III) chloride forms a green-colored complex ‘X’ with NH\(_3\). Number of moles of AgCl formed when excess AgNO\(_3\) solution is added to 100 mL of 1M solution of ‘X’ is:
\includegraphics[width=4cm]{148.png} X, Y are oxoacids of phosphorous. The number of P – OH bonds in X, Y respectively is:
Which one of the following statements is NOT correct about the compounds of alkaline earth metals?
The correct order of covalent bond character of \( BCl_3, CCl_4, BeCl_2, LiCl \) is:
The correct order of atomic radii of N, F, Al, Si is:
What type of information is collected using scanning electron microscopy?