In Duma’s method for estimation of nitrogen, 0.25g 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

1. 17.36

2. 18.20..

3. 16.76

4. 15.76

The compound that gives the most stable carbonium ion after C- Cl bond ionisation among the following  is-

1.		2.
3.		4.

consider the following compounds

hyperconjugation occurs in 

1. I only

2. II only

3. III only

4. I and III

Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?

The enolic form of ethyl acetoacetate is given below. The number of sigma and pi bonds in the enolic form of ethyl acetoacetate are:

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

Given,

Which of the given compounds can exhibit tautomerism?

1. I and II            

2. I and III

3. II and III           

4. I, II and III

Which of the following 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

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralised 10 mL of 1 M H₂SO₄. The percentage of nitrogen in the soil is

1. 37.33             2. 45.33

3. 35.33             4. 43.33

Which one among the following is most reactive towards nucleophilic addition reaction?

1.		2.
3.		4.

Structure of the compound whose IUPAC name is 3-ethyl-2-hydroxy-4-methylhex-3-en- 5-ynoic acid is ?

1. 

2.   

3.  

4.