Postulate of kinetic theory: gas molecules:
AHave fixed positions
BAre in random rapid motion; collisions are elastic
CAre stationary
DStick together
Answer & Solution
Correct answer: B. Are in random rapid motion; collisions are elastic
KTG postulates: (i) large number of identical molecules in random motion; (ii) elastic collisions (KE conserved); (iii) negligible molecular volume; (iv) no inter-molecular forces (except during brief collisions).
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