CaO(s) + H$$_2$$​​O(l) → Ca(OH$$_2$$​​(aq) + Heat, this reaction is called:

Correct option is B

• Calcium oxide (CaO) reacts with water (H₂O) to form calcium hydroxide (Ca(OH)₂).

• This type of reaction is characterized by the combination of simpler substances (CaO and H₂O) to form a more complex compound (Ca(OH)₂), and it releases heat as a product, indicating an exothermic reaction.

• Combination reactions are also known as synthesis reactions. In these, multiple reactants combine to form one product.

• An example of a combination reaction: 2H₂ + O₂ → 2H₂O (formation of water from hydrogen and oxygen).

• • Involves the breakdown of a single compound into two or more simpler substances. ex. CaCO₃ → CaO + CO₂ (Calcium carbonate decomposes into calcium oxide and carbon dioxide).

 Wurtz-Fittig Reaction

• A reaction where an aryl halide reacts with an alkyl halide in the presence of sodium to form aryl-alkyl compounds. ex. C₆H₅Cl + C₂H₅Br → C₆H₅-C₂H₅ + NaCl + NaBr (Phenyl ethane formation).

Wurtz Reaction

• Involves the reaction of two alkyl halides with sodium metal to form alkanes. ex. CH₃CH₂Cl + CH₃CH₂Cl + 2Na → CH₃CH₂CH₂CH₃ + 2NaCl (Butane formation).