At what temperature will the rms speed of air molecules be double that of NTP?

⇦

⇨

At what temperature will the rms speed of air molecules be double that of NTP?

Options

(a) 519⁰C
(b) 619⁰C
(c) 719⁰C
(d) 819⁰C

Correct Answer:

819⁰C

Explanation:

v(rms) = √(3RT / M)
At T = T₀, v(rms) = √(3RT / M)
But at temperature T, v(rms) = 2 × √(3RT₀ / M)
⇒ √(3RT / M) = 2 √(3RT₀ / M) ⇒ √T = √(4T₀) ⇒ T = 4T₀
T = 4 × 273 K = 1092 K
Therefore, T = 819°C

Related Questions:

1. If a proton, a deuteron and an alpha particle, on being accelerated by the same
2. A n-p-n transistor is connected in common emitter configuration in a given amplifier.
3. Three solids of masses m₁,m₂ and m₃ are connected with weightless string
4. ₆C¹⁴ absorbs an energitic neutron and emits beta particles. The resulting nucleus is
5. Electromagnetic induction is not used in

Topics: Behavior of Perfect Gas and Kinetic Theory (34)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends