SECTION B
Structured Questions – Paper 2 & 3
Marks - 60
Answer all the questions:
1.
(d)
On the axes, sketch a graph to show the trend in the atomic radius of the
elements P–T.
[Total : 13]
2.
[Total : 13]
3. (a)
(b)
[Total = 10]
4.
5.
(e)
[Total = 15]
6. Qualitative Analysis:
Where reagents are selected for use in a test, the name or correct formula of the
element or compound must be given.
At each stage of any test you are to record details of the following:
● colour changes seen;
● the formation of any precipitate and its solubility in an excess of the reagent added;
● the formation of any gas and its identification by a suitable test.
You should indicate clearly at what stage in a test a change occurs. Using the
Qualitative Notes Given.
(a)
You are to plan and carry out tests to determine the identities of FA 5, FA 6 and FA 7.
You should record, in a suitable form in the space below, your reagent used, tests and
observations.
You should show clearly the observations for each of FA 5, FA 6 and FA 7 with all test
reagents.
(i)
(ii)
Choice of reagents
Observations for each.
[4]
(b)
FA 8 is a divalent metal (from period 3) reacted with steam &
FA 9 is the only monovalent positive radical reacted with dil.hydrochloric acid
Test 1 : Add a small spatula measure to a 1 cm depth of distilled water in a test-tube
and shake. Add a few drops of universal indicator. Record the pH of the mixture.
FA 8 – ……………………………………………………………………………………………
……………………………………………………………………………………………
FA 9 –……………………………………………………………………………………………
……………………………………………………………………………………………
Test 2 : Heat a small spatula measure in a hard-glass test-tube.
FA 8 – ……………………………………………………………………………………………
……………………………………………………………………………………………
FA 9 –……………………………………………………………………………………………
……………………………………………………………………………………………
Test 4 : To one test-tube, add aqueous sodium hydroxide.
FA 8 – ……………………………………………………………………………………………
……………………………………………………………………………………………
FA 9 –……………………………………………………………………………………………
……………………………………………………………………………………………
Test 5 : To the second test-tube, add aqueous ammonia.
FA 8 – ……………………………………………………………………………………………
……………………………………………………………………………………………
FA 9 –……………………………………………………………………………………………
……………………………………………………………………………………………
[4]
[Total = 15]
MARKING SCHEME
SECTION B
Structured Questions – Paper 2 & 3
Marks - 60
Answer all the questions:
1.
(d)
2.
3. a.
b.
4.
5.
(e) i. 2
6.