Question

An alkene (one double bond only) with 8 carbons is reacted with Nickel catalyst and hydrogen to give a product. Which of the following is NOT true?
Group of answer choices

The product gives a sooty flame on burning in excess air

The molecular weight of the alkene is 112

The alkene gives a yellow flame on burning in excess air

The product will have several structural isomer​

Answer 1

Answer:

Some confusion may arise from the description of the catalyst used in the reaction between alkenes and hydrogen. Three metals—nickel, platinum and palladium—are commonly used, but a chemist cannot simply place a piece of one of these metals in a mixture of the alkene and hydrogen and get a reaction. Each metal catalyst must be prepared in a special way:

nickel is usually used in a finely divided form called “Raney nickel.” It is prepared by reacting a Ni-Al alloy with NaOH.

palladium is obtained commercially “supported” on an inert substance, such as charcoal, (Pd/C). The alkene is usually dissolved in ethanol when Pd/C is used as the catalyst.