Get premium membership and access questions with answers, video lessons as well as revision papers.
Crush the seeds in a mortar using a pestle;
Continue crushing the seeds while adding acetone / propanone a little at a time;
Q Decant the resulting solution into an evaporating dish/basin;
Leave the solution in the sun for some time. Propanone evaporates because of its low boiling point. The residue liquid is the oil.
lemass answered the question on January 21, 2019 at 08:18
- Below is a word equation of a process in plant nutrition.
Carbon (IV) oxide + water TJ/k L + Oxygen
(a) (i) Name the product labelled L
(ii)...(Solved)
Below is a word equation of a process in plant nutrition.
Carbon (IV) oxide + water TJ/k L + Oxygen
(a) (i) Name the product labelled L
(ii) State the requirements labelled J and K (2 marks)
(b) Explain the importance of the product L. (2 marks)
Date posted: January 21, 2019. Answers (1)
- State one difference between movement and locomotion.(Solved)
State one difference between movement and locomotion.
Date posted: January 21, 2019. Answers (1)
- State factors that increase the rate of diffusion.(Solved)
State factors that increase the rate of diffusion.
Date posted: January 21, 2019. Answers (1)
- Explain why adenine and thymine have double bond while cytosine and guanine have triple bond(Solved)
Explain why adenine and thymine have double bond while cytosine and guanine have triple bond.
Date posted: January 20, 2019. Answers (1)
- Explain the importance of protecting the forest ecosystem with reference to the following:(20 marks)
(a)climate change
(b)biodiversity
(c)biotechnology
(d)water conservation
(e)pollution(Solved)
Explain the importance of protecting the forest ecosystem with reference to the following:(20 marks)
(a)climate change
(b)biodiversity
(c)biotechnology
(d)water conservation
(e)pollution
Date posted: January 16, 2019. Answers (1)
- Distinguish between a weed, Noxious plant and invasive species.(Solved)
Distinguish between a weed, Noxious plant and invasive species.
Date posted: January 11, 2019. Answers (1)
- Give two importance of respiratory quotient(Solved)
Give two importance of respiratory quotient.
Date posted: January 6, 2019. Answers (1)
- Discuss the components of the nephron(Solved)
Discuss the components of the nephron.
Date posted: January 4, 2019. Answers (1)
- Name two classes of phylum arthropoda with cephalothorax(Solved)
Name two classes of phylum arthropoda with cephalothorax
Date posted: December 26, 2018. Answers (1)
- Describe the route taken by water from the soil up to the evaporating surface of a plant
(Solved)
Describe the route taken by water from the soil up to the evaporating surface of a plant
Date posted: December 6, 2018. Answers (1)
- Describe the adaptations of the nervous system to its functions(Solved)
Describe the adaptations of the nervous system to its functions
Date posted: December 6, 2018. Answers (1)
- State the economic importance of members of Monera and Fungi and for each economic importance name a suitable or appropriate organism(Solved)
State the economic importance of members of Monera and Fungi and for each economic importance name a suitable or appropriate organism
Date posted: December 6, 2018. Answers (1)
- Describe the process of mitosis(Solved)
Describe the process of mitosis
Date posted: December 4, 2018. Answers (1)
- Describe how the various supportive tissues in plants adapt them to their habitats(Solved)
Describe how the various supportive tissues in plants adapt them to their habitats
Date posted: December 4, 2018. Answers (1)
- Discuss Lamarck’s and Darwin’s theories of evolution(Solved)
Discuss Lamarck’s and Darwin’s theories of evolution
Date posted: December 4, 2018. Answers (1)
- Describe the process of secondary thickening in a woody stem
(Solved)
Describe the process of secondary thickening in a woody stem
Date posted: December 4, 2018. Answers (1)
- What is secondary growth(Solved)
What is secondary growth?
Date posted: December 4, 2018. Answers (1)
- Which organelle is most abundant in white blood cell?(Solved)
Which organelle is most abundant in white blood cell?
Date posted: November 13, 2018. Answers (1)
- Explain how altitude affects the rate of breathing(Solved)
Explain how altitude affects the rate of breathing.
Date posted: November 8, 2018. Answers (1)
- Explain how mammals regulate their body temperature and relate this to their body size(Solved)
Explain how mammals regulate their body temperature and relate this to their body size
Date posted: November 7, 2018. Answers (1)