Solid carbon dioxide absorbs heat energy from the ice – cream and changes to gas. This keeps the ice – cream cold.
Kavungya answered the question on March 25, 2019 at 08:44
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(ii) Explain why both B and D levelled off?
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Name
(a) Cleansing agents for removing these stains from your school dress:
(i) Oily and greasy –
(ii) Blood stains –
(iii) Perspiration stains –
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(c) A solvent for paint –
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(e) A solid that sublimes –
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Date posted: March 25, 2019. Answers (1)
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(a) Coloured extracts of grass dissolved in ethanol.
(b) Kerosine from Crude oil.
(c) Paraffin from water.
(d)...(Solved)
Against each mixture write down suitable methods of separation.
(a) Coloured extracts of grass dissolved in ethanol.
(b) Kerosine from Crude oil.
(c) Paraffin from water.
(d) Iron filings from Sulphur powder.
(e) Ammonium chloride from Sodium chloride.
(f) Seawater, to obtain salt.
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Date posted: March 25, 2019. Answers (1)