uestions","formulaUrl":null,"initialIndex":42,"initialQuestionWindow":[{"id":"68623973-35f1-4281-9c40-aea1e86fbe82","revisionId":"e2d8f610-30d2-4bda-b594-b611651e09d7","questionNumber":null,"questionType":"LA","specification":"The table shows information about some organic compounds.\n\n| Compound | Formula |\n| :---: | :---: |\n| **A** | \$\\text{C}_2\\text{H}_6\$ |\n| **B** | \$\\text{C}_3\\text{H}_8\$ |\n| **C** | \$\\text{C}_3\\text{H}_6\$ |\n| **D** | \$\\text{C}_4\\text{H}_8\$ |\n| **E** | \$\\text{C}_5\\text{H}_{12}\$ |","difficulty":3,"difficultyBand":"medium","totalMarks":9,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"79122370-e1a1-4972-8933-d0b18e881cee","label":"a","content":"Some of the compounds belong to the homologous series called the **alkanes**.\nWhich hydrocarbons are alkanes?\nSelect **three** compounds from **A**, **B**, **C**, **D**, and **E**.","markscheme":"- Identifies **A**, **B**, and **E** B1","marks":1,"order":0,"markingRubric":null,"explanation":null,"options":[]},{"id":"f854cba3-cbd8-4aca-85bc-2fb8d3d02f2f","label":"b","content":"Which homologous series do the compounds which are **not** alkanes belong to?\nSelect **one** option:\n* Alcohols\n* Alkenes\n* Carboxylic acids\n* Esters","markscheme":"- Selects **Alkenes** B1","marks":1,"order":1,"markingRubric":null,"explanation":null,"options":[]},{"id":"07b96721-3393-47f1-bfb7-bedb762c7cbe","label":"c","content":"Compound **A**, \$\\text{C}_2\\text{H}_6\$, burns completely in oxygen.\nState the names of the **two** products of this reaction.","markscheme":"- Identifies **carbon dioxide** B1\n- Identifies **water** B1","marks":2,"order":2,"markingRubric":null,"explanation":null,"options":[]},{"id":"7a8aa28f-144a-4e54-b966-3538f0b77994","label":"d","content":"Complete the sentences about fractional distillation. Use words from the list below:\n`[colder, condense, cracked, evaporate, fractions, heated, hotter, polymers]`\n\n* Crude oil is \\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_ to vaporise it before it enters the fractionating column.\n* The fractionating column is \\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_ at the bottom than at the top.\n* Hydrocarbon vapours rise up the column and \\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_ at different heights.\n* The separated groups of hydrocarbons are called \\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_\\_.","markscheme":"- First blank: **heated** B1\n- Second blank: **hotter** B1\n- Third blank: **condense** B1\n- Fourth blank: **fractions** B1","marks":4,"order":3,"markingRubric":null,"explanation":null,"options":[]},{"id":"464ad935-cfeb-41bc-acab-f73d94565277","label":"e","content":"Fossil fuels like crude oil are classified as finite resources.\nExplain what is meant by a **finite resource**.","markscheme":"- Explains that it is a resource that is being used up faster than it can be replaced (or will run out / has a limited supply) B1","marks":1,"order":4,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"6aef8358-e6a5-41d9-a4a4-6fd0e20729b7","revisionId":"0579e590-fc45-4e2b-b8d0-52f0e7abc11b","questionNumber":null,"questionType":"MC","specification":"A student reacts a hydrocarbon with bromine water.\n\nThe formula of the product is $\\text{C}_4\\text{H}_8\\text{Br}_2$.\n\nWhich is the displayed formula of the hydrocarbon?\n\n![Four displayed organic chemical structures labeled A, B, C, and D.](https://assets.mathsgenie.co.uk/aqa-qb/1bf1de14-189d-492e-a6a2-fab630483387.png)","difficulty":3,"difficultyBand":"medium","totalMarks":1,"sourceTitle":null,"calculatorUse":null,"parts":[],"options":[{"id":"aeba6f93-55a0-4ec3-8004-d7b9b9e111a9","content":"A","correct":false,"markscheme":"This structure represents butane ($\\text{C}_4\\text{H}_{10}$), which is an alkane and does not undergo addition reactions with bromine water.","order":0},{"id":"cda2c401-d472-4c5d-99e4-43e3ea85a0cb","content":"B","c

Organic chemistry

Question 19

Organic chemistry Questions

Organic chemistry

Question 19

Organic chemistry Questions