What is the name of this hydrocarbon?
[a] 2,3-dimethylpentane
[b] 3,4-diethylpentane
[c] 2,3-diethylbutane

Answer : The name of the given hydrocarbon is, 2,3-dimethylpentane.

Explanation :

The basic rules for naming of organic compounds are :

In the given hydrocarbon, the longest possible carbon chain number is 5 that means we add prefix 'pent' and two substituent group present at position 2 and 3 and we are add suffix '-ane'. So, the name of given hydrocarbon will be, 2,3-dimethylpentane.

Hence, the correct option is, (A) 2,3-dimethylpentane.

212121212121212122121212121121212122121212121212121212121n i think

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.