AQA A level Chemistry comprehensive Questions and Answers with Verified Solutions

AQA A level Chemistry comprehensive
Questions and Answers with Verified
Solutions
Question 1:
Alkenes Alkanes

Answer:
Halogens


Question 2:
8 terms

Answer:
11 terms Teacher 19 terms


Question 3:
reneesimons Preview

Answer:
fiza-sajeel jonathanraybarry Preview


Question 4:
Do Carbonyls have a higher or lower boiling

Answer:
Higher as carbonyls have permanent dipole dipole forces

,Question 5:
point when compared to a corresponding Alkane? Why?

Answer:
whereas alkanes have van der Waals.


Question 6:
Do Carbonyls have a higher or lower boiling

Answer:
Lower as carbonyls have permanent dipole dipole forces


Question 7:
point when compared to a corresponding alcohol?

Answer:
whereas alcohols have hydrogen bonding.


Question 8:
Do Carbonyls dissolve in water?

Answer:
Yes limited association with water molecules


Question 9:
What's the test for an Aldehyde?

Answer:
Tollens reagent - Silver mirror test OR Fehling's solution blue to brick red

, Question 10:
What is the Test for a Ketone?

Answer:
Negative result with an oxidizing agent like Fehlings


Question 11:
What is the Test for a Carboxylic Acid?

Answer:
Add a carbonate - CO2 formed and effervesence OR Universal indicator -
red colour


Question 12:
How do you isolate a carboxylic acid?

Answer:
Reflux and excess oxidising agent


Question 13:
What is the Oxidising Agent for Alcohols?

Answer:
Acidified Potassium Dichromate (K2Cr2O7)


Question 14:
Reagents and conditions to oxidise

Answer:
Reagent: Potassium dichromate