alleryStart learning →Naturally occurring uranium contains what percentage of the fissile isotope uranium-235?
AAbout 7.2 percent
BAbout 2.0 percent
CAbout 0.72 percent
DAbout 5.0 percent
Answer & Solution
Correct answer: C. About 0.72 percent
1. Only uranium-235 is fissile, meaning able to sustain a fission chain reaction.
2. Natural uranium holds only about 0.72 percent of it, the rest being the heavier uranium-238.
3. Nuclear reactors need fuel enriched to 2 to 5 percent uranium-235, so the natural ore must be concentrated first.
4. The figures 2.0 and 5.0 percent are the reactor fuel targets, not the natural abundance, which makes them the traps here.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 9 "Gases", section 9.4 Effusion and Diffusion of Gases_
Keep practising Gases
Browse all Gases questions for IMU CET, or explore more Chemistry topics.
Related questions
The van der Waals equation reduces to PV = nRT under which condition?A 4.25 L flask holds 3.46 mol of carbon dioxide at 229 degrees C. What pressure does the iIn the van der Waals equation, what does the constant b account for?Who developed the first and simplest equation that improves on the ideal gas law?Under which conditions does a real gas behave most nearly like an ideal gas?For a gas showing perfectly ideal behaviour, the compressibility factor Z takes which valuKinetic molecular theory explains Boyle's law by which change when the volume of a gas decAt a fixed temperature, how do lighter gas molecules compare with heavier ones?