Overall transformation : Ar-H to Ar-R
Named after Friedel and Crafts who discovered the reaction in 1877.
Reagent : normally the alkyl halide (e.g. R-Br or R-Cl) with aluminum trichloride, AlCl3, a Lewis acid catalyst.
The AlCl3 enhances the electrophilicity of the alkyl halide by complexing with the halide.
Electrophilic species : the carbocation (i.e. R +) formed by the "removal" of the halide by the Lewis acid catalyst
The reactive electrophile, the carbocation is prone to rearrangement to a more stable carbocation which will then undergo the alkylation reaction.

Friedel-Crafts reactions are limited to arenes as or more reactive than mono-halobenzenes
Other Lewis acids such as BF3, FeCl3 or ZnCl2 can also be used
Other sources of carbocations can also be used:
from loss of water from alcohols treated with acid such as H2SO4
from the protonation of alkenes by acid such as H2SO4
Alkylation products can also be obtained by the reduction of Friedel-Crafts acylation products
Answer:
Contractionary phase
Explanation:
Keynesian Economic Theory state that government should increase demand to boost economic growth. Keynesian economists believe that the consumer demand is the driving force of economy hence they support expansionary fiscal policy. According to this theory the main tools to boost economy are unemployment benefits, infrastructure and education. John Maynard Keynes proposed deficit spending during the contrationary phase of business cycle.
Answer: This study is most likely a CONTENT ANALYSIS.
Explanation: CONTENT ANALYSIS can be defined as the analytical study of that which is contained in speech or writing. It involves the identification of patterns such as words, concepts,to determine the context of a text.
In this question, the study of romance novels found different types of heroines, this in turn will determine what the context of the novel will be. Whether is is about a a romantic dreamer, the cold professional etc.
D:Evacuating victims from target areas
