Please read question/answer choices carefully and answer ALL questions with a clear and simple explanation. Incorrect or Incomplete answers will not be given any credit (thumbs down). Thank you!Q1. Predict the order of elution of a mixture of benzyl alcohol, biphenyl, benzoic acid, and methyl benzoate from an Alumina column in column chromatography. AND WHY (SIMPLE EXPLANATION)Q2. Calculate the percent yield of Methyl nitrobenzoate, if 6 grams of Methyl benzoate produced 3 grams of Methyl nitrobenzoate during the nitration experiment. Q3. According to the news, the Mississippi River is polluted with toxic Dioxin. You have a pure sample of Dioxin. How do you determine that the news is true or not?Q4. Explain the Retention time, in GC. What will happen to retention time, if you increase the detector temperature?