First order reaction: ln[R] vs timeप्रथम कोटि अभिक्रिया: ln[R] बनाम समयFirst order reaction: ln[R] vs time

NCERT Fig 3.4 · Class 12 Chemistry · Chapter 3 · interactive diagram

Parts and what they mean

• ln[R] vs t is a straight line for first order (प्रथम कोटि के लिए ln[R] बनाम t सरल रेखा) — ln[R] = −kt + ln[R]₀, i.e. [R] = [R]₀e^(−kt) — an exponential fall.
• Slope = −k (ढलान = −k) — Unit of k for first order: s⁻¹ (time⁻¹).
• Intercept = ln[R]₀ (अंतःखंड = ln[R]₀) — ln of the initial concentration.
• ln[R] vs time (ln[R] बनाम समय) — Examples: hydrogenation of ethene, N₂O₅ and N₂O decomposition, all radioactive decay.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 3.4. Report a mistake