21.

For the solution of the gases w, x, y and z in water at 298 K, the Henrys law constants (K_H) are 0.5, 2, 35 and 40 kbar, respectively. The correct plot for the given data is :

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Consider the bcc unit cells of the solids 1 and 2 with the position of atoms as shown below. The radius of atom B is twice that of atom A. The unit cell edge length is 50% more in solid 2 than in 1. What is the approximate packing efficiency in solid 2?

• 75%

• 65%

• 45%

• 90%

The major product obtained in the following reaction is:

Fructose and glucose can be distinguished by :

• Barfoed's test

• Benedict's test

• Seliwanoff’s test

• Fehling’s test

The structure of Nylon–6 is:

The major product of the following reaction is:

The major product of the following reaction is:

The major product in the following reaction is:

The major product obtained in the following reaction is:

Which of the following compounds will show the maximum ‘enol’ content ?

• CH₃COCH₂COOC₂H₅

• CH₃COCH₂CONH₂

• CH₃COCH₂COCH₃

• CH₃COCH₃