Chemistry, 22.07.2019 19:00 Marcus2935

When is di- used in the name of a hydrocarbon? when the main chain contains two carbon atoms when there are two different substituents when there are two main chains of equal length when there are two identical substituents

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Answer from: aek02

Correct answer is
when there are two identical substituents
for example 1,2 - dichloroethane.

Answer from: Nashae4771

Answer : The correct option is, when there are two identical substituents.

Explanation :

The basic rules for naming of organic compounds are :

First select the longest possible carbon chain. When the main chain contains two carbon atoms then the name of the main chain is, eth-.The longest possible carbon chain should include the carbons of double or triple bonds. The naming of alkane is done by adding the suffix -ane, alkene by adding the suffix -ene, alkyne by adding the suffix -yne and carboxylic acid by adding the suffix -oic acid. The numbering is done in such a way that first carbon of double or triple bond gets the lowest number. The carbon atoms of the double or triple bond get the preference over the other substituents present in the parent chain. If two or more similar alkyl groups or identical substituents are present in a compound, the words di-, tri-, tetra- and so on are used to specify the number of times of the alkyl groups in the chain.

Hence, the correct option is, when there are two identical substituents.

Answer from: Quest

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. $hbr$ completely dissociates to $h^+$ and $br-$ ions. a is incorrect because $h_2s$ does not fully ionize to $h^+$ and $hs^-$ ions and some remain as the compound $h_2s$ . c and d are incorrect because, $li_2o$ and $libr$ do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise, if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both $li_2o$ and $libr$ have a complete octet so can not accept any electrons which disqualifies them as acids.

Answer from: Quest

it's c (engineer's do their work with mechanical stuff not on any living being)

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When is di- used in the name of a hydrocarbon? when the main chain contains two carbon atoms when t...

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