Faculty of Mechanical Engineering

TOEIC has been recognized as a golden to unlock doors of job opportunity for working people. At Hanoi University of Industry (HaUI), TOEIC certificate has become a compulsory requirement for high quality students to be qualified for university degree. This article explores the students’ difficulties in the test of TOEIC reading comprehension and then proposes applicable solutions to the difficulties.

10p vijichoo2711 04-06-2021 30 6   Download

Limitations: The Wurtz reaction is limited to the synthesis of symmetric alkanes from alkyl iodides & bromides. If two dissimilar alkyl halides are taken as reactants, then the product is a mixture of alkanes that is, often, difficult to separate. A side reaction also occurs to produce an alkene. The side reaction becomes more significant when the alkyl halides are bulky at the halogen-attached carbon.

25p 3dagkhoa 13-10-2010 169 10   Download