Chemistry
(i) Draw the structural formula for each of the following:
- 2,2 dimethyl pentane
- methanol
(ii) Write the IUPAC name for the following compounds:
- acetaldehyde
- acetylene
Organic Chemistry
ICSE 2020
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Answer
(i)
1. 2,2 dimethyl pentane
2. Methanol
(ii)
- IUPAC name of acetaldehyde is Ethanal.
- IUPAC name of acetylene is Ethyne.
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Related Questions
State one relevant reason for each of the following:
(i) Graphite anode is preferred to platinum in the electrolysis of molten lead bromide.
(ii) Soda lime is preferred to sodium hydroxide in the laboratory preparation of methane.
(iii) Hydrated copper sulphate crystals turn white on heating.
(iv) Concentrated nitric acid appears yellow, when it is left for a while in a glass bottle.
(v) Hydrogen chloride gas fumes in moist air.
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2CO + O2 ⟶ 2CO2
(ii) The volume occupied by 80 g of carbon dioxide at STP.
(iii) Calculate the number of molecules in 4.4 gm of CO2.
[Atomic mass of C= 12, O=16]
(iv) State the law associated in question no. (f)(i) above.
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(i) Action of concentrated nitric acid on copper.
(ii) Addition of excess ammonium hydroxide into copper sulphate solution.
(iii) A piece of sodium metal is put into ethanol at room temperature.
(iv) Zinc carbonate is heated strongly.
(v) Sulphide ore is added to a tank containing oil and water, and then stirred or agitated with air.
Write a balanced chemical equation for each of the following:
(i) Reaction of carbon powder and concentrated nitric acid.
(ii) Reaction of excess ammonia with chlorine.
(iii) Reaction of lead nitrate solution with ammonium hydroxide.
(iv) Producing ethane from bromo ethane using Zn/Cu couple in alcohol.
(v) Complete combustion of ethane.