In which of the following reactions there is no change in valency [NCERT 1974; CPMT 1978]

\[2BaO+{{O}_{2}}\,\to \,2Ba{{O}_{2}}\]

\[4KCl{{O}_{3}}\,\to \,3KCl{{O}_{4}}+KCl\]

\[Ba{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\,\to \,\,BaS{{O}_{4}}+{{H}_{2}}{{O}_{2}}\]

In which of the following reactions there is no change in valency �

1.	In which of the following reactions there is no change in valency [NCERT 1974; CPMT 1978]
A.	\[4KCl{{O}_{3}}\,\to \,3KCl{{O}_{4}}+KCl\]
B.	\[C{{l}_{2}}\]
C.	\[Ba{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\,\to \,\,BaS{{O}_{4}}+{{H}_{2}}{{O}_{2}}\]
D.	\[2BaO+{{O}_{2}}\,\to \,2Ba{{O}_{2}}\]
Answer» D. \[2BaO+{{O}_{2}}\,\to \,2Ba{{O}_{2}}\]

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In which of the following reactions there is no change in valency [NCERT 1974; CPMT 1978]

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