Which of the following reactions involves oxidation-reduction [NCERT 1972; AFMC 2000; Pb. CET 2004; CPMT 2004]

\[2NaOH+{{H}_{2}}S{{O}_{4}}\,\to \,N{{a}_{2}}S{{O}_{4}}+2{{H}_{2}}O\]

\[HBr+AgN{{O}_{3}}\,\to \,AgBr+HN{{O}_{3}}\]

\[{{H}_{2}}+B{{r}_{2}}\,\to \,2HBr\]

Which of the following reactions involves oxidation-reduction [NCERT 1

1.	Which of the following reactions involves oxidation-reduction [NCERT 1972; AFMC 2000; Pb. CET 2004; CPMT 2004]
A.	\[NaBr+HCl\,\to \,NaCl+HBr\]
B.	\[HBr+AgN{{O}_{3}}\,\to \,AgBr+HN{{O}_{3}}\]
C.	\[{{H}_{2}}+B{{r}_{2}}\,\to \,2HBr\]
D.	\[2NaOH+{{H}_{2}}S{{O}_{4}}\,\to \,N{{a}_{2}}S{{O}_{4}}+2{{H}_{2}}O\]
Answer» D. \[2NaOH+{{H}_{2}}S{{O}_{4}}\,\to \,N{{a}_{2}}S{{O}_{4}}+2{{H}_{2}}O\]

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