Answer:
Reaction 1 - elimination
Reaction 2- substitution
Reaction 3- the two combined
Explanation:
In the first reaction, a strong base, KOH is used in the reaction. Remember that when a tertiary alkyl halide is the substrate, the use of a strong base leads to the domination of E1 mechanism over SN1 mechanism, hence the product shown in the image attached.
In reaction 2, the secondary alkyl halide must undergo an SN2 substitution since an aprotic solvent (THF) is used. This leads to inversion of configuration as shown in the product.
In reaction 3, CN^- is both a strong base and a good nucleophile hence a mixture of substitution and elimination products are formed depending on the nature of the alkyl halide.
Answer: Copper (II) Sulfate! (CuSO4)
Explanation:
This is because compared to the other salts, it is the visible color blue. The other ones are plain white. Happy holidays! Don’t stress :)
The only example which is not a state change is wood burning into a fire, which is a <em>chemical</em> change. The remainder of the choices are all changes of state. e.g. changing between solid, liquid, and gas phases, with no chemical reaction.