2. 下列反应中属于置换反应的是
(
C
)
A.$\ce{C + CO_{2}\xlongequal{高温} 2CO}$
B.$\ce{SO_{2} + 2NaOH\xlongequal{\;\;}Na_{2}SO_{3} + H_{2}O}$
C.$\ce{2Na + 2H_{2}O\xlongequal{\;\;}2NaOH + H_{2}\uparrow}$
D.$\ce{Cu + 4HNO_{3}(浓)\xlongequal{\;\;}Cu(NO_{3})_{2} + 2NO_{2}\uparrow + 2H_{2}O}$