Q12 V3A compound underwent two tests.In the first test, 1 mole of the compound was completely combusted, yielding 3 moles of CO2.In the second test, the compound showed a rapid reaction with bromine. The formula of the compound is likely to be:

Question

BlackTom AI · Accepted Answer

The problem presents a compound that, on complete combustion of 1 mole, produces 3 moles of CO2, and it also shows a rapid reaction with bromine. We will evaluate each option against these facts.
Option a: C4H10. If a C4H10 alkane combusts completely, the typical CO2 yield would be 4 moles of CO2 per mole of fuel (C4H10 + 6.5 O2 → 4 CO2 + 5 H2O). This would give 4 moles of CO2, not 3. Since the observed CO2 is 3, this option is inconsistent with the data.
Option b: C3H8. Complete combustion would produce 3 moles of CO2 (C3H8 + 5 O2 → 3 CO2 + 4 H2O), which aligns with the CO2 count. However, this compound is an alkane and typically does not react rapidly with bromine under normal conditions; alkanes require radical initiation or UV light for bromine substitution/halogenation to proceed rapidly. The rapid bromine reaction is a key clue that this is not an alkane, so this option is unlikely given the second test.
Option c: C2H4. Ethene (C2H4) would yield 2 moles of CO2 on complete combustion (C2H4 + 3 O2 → 2 CO2 + 2 H2O), which does not match the observed 3 moles of CO2. Therefore this option is incorrect.
Option d: C3H6. Propene (C3H6) combusts to produce 3 moles of CO2 (C3H6 + 4.5 O2 → 3 CO2 + 3 H2O), matching the given 3 CO2. Additionally, propene contains a C=C double bond, so it should react rapidly with bromine (Br2) in the characteristic addition reaction across the double bond. This aligns with the second test outcome. Therefore this option fits both observations.

Q12 V3A compound underwent two tests.In the first test, 1 mole of the compound was completely combusted, yielding 3 moles of CO2.In the second test, the compound showed a rapid reaction with bromine. The formula of the compound is likely to be:

查看解析

登录即可查看完整答案

类似问题

Which of the following statements is true regarding the chemicals that are used in this experiment?

Which of the following substances would decolourise bromine? .

Which of the following substances would decolourise bromine? .

What is the minimum number of carbon atoms required for a hydrocarbon to be classified as an alkene?

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单