1. The first step in the free radical chain reaction is: A. two radical species

Question

1. The first step in the free radical chain reaction is: A. two radical species coming together to form a stablemolecule B. a radical combines with the wall of the container C. halogen radical abstracting a H from a stablehydrocarbon D. halogen bond homolytic cleavage E. carbon radical attacking a halogen molecule 2. When a C-H bond is cleaved homolytically, the resultingintermediate is called a A. radical B. halogen C. carbocation D. carbene E. carbanion 3. Which is the most selective halogen for free radicalsubstitution reactions? A. F B. Cl C. Br 4. Which is the following radicals is the most stable? A. CH3CH2CH2* B. (CH3)2CH* C. (CH3)3C* D. CH3* E. CH3C*CH2CH3 5. Which is the most favored site for proton abstraction in afree radical mechanism? A. allyl carbon B. secondary carbon C. methyl carbon D. tertiary carbon E. primary carbon 1. The first step in the free radical chain reaction is: A. two radical species coming together to form a stablemolecule B. a radical combines with the wall of the container C. halogen radical abstracting a H from a stablehydrocarbon D. halogen bond homolytic cleavage E. carbon radical attacking a halogen molecule 2. When a C-H bond is cleaved homolytically, the resultingintermediate is called a A. radical B. halogen C. carbocation D. carbene E. carbanion 3. Which is the most selective halogen for free radicalsubstitution reactions? A. F B. Cl C. Br 4. Which is the following radicals is the most stable? A. CH3CH2CH2* B. (CH3)2CH* C. (CH3)3C* D. CH3* E. CH3C*CH2CH3 5. Which is the most favored site for proton abstraction in afree radical mechanism? A. allyl carbon B. secondary carbon C. methyl carbon D. tertiary carbon E. primary carbon

Explanation / Answer

1. The first step in the free radical chain reaction is: A. two radical species coming together to form a stablemolecule B. a radical combines with the wall of the container C. halogen radicalabstracting a H from a stable hydrocarbon D. halogen bond homolytic cleavage E. carbon radical attacking a halogen molecule 2. When a C-H bond is cleaved homolytically, the resultingintermediate is called a A.radical B. halogen C. carbocation D. carbene E. carbanion 3. Which is the most selective halogen for free radicalsubstitution reactions? A. F B. Cl C. Br 4. Which is the following radicals is the most stable? A. CH3CH2CH2* B. (CH3)2CH* C. (CH3)3C* D. CH3* E. CH3C*CH2CH3 5. Which is the most favored site for proton abstraction in afree radical mechanism? A. allyl carbon B. secondary carbon C. methyl carbon D. tertiarycarbon E. primary carbon

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