Given below are two statements.
Statement I 
salts are white while 
salts are blue in colour.
Statement II Fluorine and chloride gives only one oxide.
In the light of the statements, choose the correct answer from the options given below.
Text Solution
Verified by ExpertsB
Statement I is true but statement II is false.
(I) Zinc and copper are transition metals and their ions are generally coloured due to 
transition of unpaired electron. But in case of 
is completely filled and no unpaired electrons are available for transition. So, light falling on these ions gets completely transmitted and their salts appear white.
However, ion 
has 1 unpaired clectron. The unpaired electron absorbs particular wavelengths in visible region of light and the transmitted light shows the complementary colour 'blue'.
(II) Fluorine has only two orbits. In 2 nd orbit, it has 
configuration with no vacant ' 
' orbitals. So it cannot form more than one oxide, i.e. 
.
Chlorine, on the other hand, has 3 orbitals in its atoms and 
is lying vacant in it. Therefore it can show variable valency and gives a series of oxides. Like 
etc
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