Previous Year Paper year:2010 : ICSE-X-Chemistry

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ICSE-X-Chemistry

Previous Year Paper year:2010

with Solutions - page 7

#6-a-iii
iii. Potassium sulphate from potassium hydroxide solution

#6-a-iv
iv. Lead chloride from lead carbonate (two equations)

#6-b [5]
Compound A is bubbled through bromine dissolved in carbon tetrachloride and the
product is ``\ce{CH2Br.CH2Br}``.
$$\ce{A ->[\ce{Br2} ,\ce{CCl4}] CH2Br.CH2Br }$$

#6-b-i
i. Draw the structural formula of A.

#6-b-ii
ii. What type of reaction has A undergone?

#6-b-iii
iii. What is your observation?

#6-b-iv
iv. Name (not formula) the compound formed when steam reacts with A in the
presence of phosphoric acid.

#6-b-v
v. What is the procedure for converting the product of (b) (iv) back to A?

#7

#7-a [3]
The diagram shows a simple arrangement of the fountain experiment.

#7-a-i
i. Name the two gases you have studied which can be used in this experiment.

#7-a-ii
ii. What is the common property demonstrated by this experiment?

#7-b [2]
Define the following terms:

#7-b-i
i. Ionisation potential

#7-b-ii
ii. Electron affinity