Question

Refer to the four compounds below for question 5-7: CH3 will have intermolecular hydrogen bonding. 5) 6) is the most nonpolar compound in the group. 7) will have the lowest Rf value on a silica-gel TLC plate. 17) In the distillation setup shown, the water in the condenser (5) should flow 0 161 A) in through [7) and out through [9] C) in through [9] and out through [7] B) in through [61 and out through [7] D) it is not necessary to have any water flowing

Answer 1

• Compound C will have more intermolecular hydrogen bonding, due to hydrogen of NH2 substituent of 1 molecule with nitrogen atom of same substituent of same molecule
• compound A is the most non-polar compound due to lack of polar groups or electronegative atom like nitrogen and oxygen as are present in B C and D
• Compound C will have lowest RF on TLC plate. Because it is highly polar compound and it will not travel distance with non -polar mobile phase of TLC
• In distillation setup option B is right, flow of water should be opposite to vapours direction.