MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryChemical kineticsPrevious Year Questions
A first order reaction has a rate constant of 2.303 × 10– 3 s–1. The time required for 40 g of this reactant to reduce to 10 g will be: [Given that log10 2 = 0.3010 (Odisha NEET 2019)
A.230.3 s
B.301 s
C.2000 s
D.602 s✓ Correct
Explanation
For a first order reaction, 0 2.303log [ ]t A k t A 3 2 3 3 2.303 40 2.303 10 log 10 1 2 log 2 0.3010 602 s 10 10 t t x x