K16. For 2H,Ofaq)-2H,0a) +0(g, which plot confirms ct to oK20. Addition polymeri

Question

K16. For 2H,Ofaq)-2H,0a) +0(g, which plot confirms ct to oK20. Addition polymerization of ethene occurs via the chain Addition mechanism R,-2R R+ CH CH,- RCH CH RCH,CH,, + CH,CH, R(CHCHh. R(CH,CH+R(CH,CH -R(CH,CH R (5) where R, is a thermally unstable molecule such as benzoyl peroxide, (C H.C00 Which statement about this reaction is FALSE? (A) R, is an initiator. (B) Step 5 is a branching step C) Step 5 is a termination step (D) R(CH,CHy is a chain carrier Time K17. The second-order reaction (first-order in each reactant) Crystal violet+HydroxideProducts can be approximated as a pseudo-first-order reaction if (A) a catalyst is used (B) equilibrium is achieved. (C) hydroxide is present in large excess. (D) the temperature is sufficiently high. K18. The figure shows linearized plots for a first-order reaction of the type A B. Which trace represents data for the reaction at the highest temperature? In[A] Time (A) TA (B) T(C) Te (D) To K19. A proposed mechanism consists of the set of consecutive A--B-i C. It is most appropriate to use the steady state approximation for (A) [B] when k >>k. (B) [C] when k,>k (C) [BJ when(D) [C] when kk

Explanation / Answer

K-16 - D

from the integrated equation of second order,plot D can be obtained

K-17-C

K-18- D

K-19-A

K-20-B

use comment section for queries

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