Q.
In the reaction NH4NO2(aq)→N2(g)+2H2O(l) the volume of N2 after 20 min and after a long time is 40 ml and 70 ml respectively. The value of rate constant is :
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a
(1/20)ln(7/4)min−1
b
(2.303/1200)log(7/3)sec−1
c
(1/20)log(7/3)min−1
d
(2.303/20)log(11/7)min−1
answer is B.
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Detailed Solution
NH4NO2(aq)→N2(g)+2H2O(l)K=2.303tlogV∞−VOV∞−Vt⇒ V0=0 ⇒K=2.30320log70−070−40=2.30320log(7030)⇒ K=2.30320×60log73=2.3031200log73 sec-1
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