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WBCS Exe. Prelims 2017 Prev. Yr. Paper

Medium 200 Questions 150 min 200 marks

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Question No: 31Difficulty: mediumMarks: 1mcq

The conversion of CH_{3} C \equiv CH to CH_{3} CH = CH_{2} requires:

Question No: 32Difficulty: mediumMarks: 1mcq

The conversion of RBr to RMgBr requires:

Question No: 33Difficulty: mediumMarks: 1mcq

The fastest S_{N} 1 reaction occurs with which of the following compounds?

Question No: 34Difficulty: mediumMarks: 1mcq

An example of a modified underground stem is:

Question No: 35Difficulty: mediumMarks: 1mcq

Crossing over occurs during meiosis at which stage?

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