The correct statement about the SN1 reaction is:
|1.||100 % racemisation.|
|2.||Inversion more than retention leads to partial racemisation.|
|3.||100 % retention.|
|4.||100 % Inversion.|
Which of the following statements is not correct for a nucleophile?
1. Nucleophile is a Lewis acid.
2. Ammonia is a nucleophile.
3. Nucleophiles attack low electron density sites.
4. Nucleophiles are not electron-seeking.
Two possible stereo-structures of CH3CHOH.COOH, which are optically active, is called?
In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is:
In which of the following compounds, the C—Cl bond ionization shall give the most stable carbonium ion?
Consider the following compounds-
Hyperconjugation occurs in:
|1.||I only||2.||II only|
|3.||III only||4.||I and III|
The enolic form of ethyl acetoacetate is given below-
The number of σ and π bonds in the enolic form are respectively:
1. 18 sigma bonds and 2 pi-bonds
2. 16 sigma bonds and 1 pi-bond
3. 9 sigma bonds and 2 pi-bonds
4. 9 sigma bonds and 1 pi-bond
In Kjeldahl’s method for estimation of nitrogen present in the soil sample, ammonia evolved from 0.75g of sample neutralized 10ml. of 1M H2SO4. The percentage of nitrogen in the soil is:
The structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is: