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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties5 Marks
Question
Electronic configuration of some elements is given in Column I and their electron gain enthalpies are given in Column II. Match the electronic configuration with electron gain enthalpy:
 
Column (I)
 
Column (II)
 
Electronic configuration
 
Electron gain enthalpy/ kJ mol-1
i.
1s2 2s2 sp6
A.
-53
ii.
1s2 2s2 2p6 3s1
B.
-328
iii.
1s2 2s2 2p5
C.
-141
iv.
1s2 2s2 2p4
D.
+48
✓

Answer

 
Column (I)
 
Column (II)
 
Electronic configuration
 
Electron gain enthalpy/ kJ mol-1
i.
1s2 2s2 sp6
A.
+48
ii.
1s2 2s2 2p6 3s1
B.
-53
iii.
1s2 2s2 2p5
C.
-328
iv.
1s2 2s2 2p4
D.
-141

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