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4 years ago

Name the following compound: 2-ethyl-4-methylheptene 3,5-dimethyl-2-octene 2-ethyl-4-methylheptane 3-methyl-5-propyl-2-hexene

Chemistry

1 answer:

Nadusha1986 [10]4 years ago

5 0

Answer:

3,5-dimethyl-2-octene

Explanation:

The parent chain will be choosen based on the highest value. In this case, if we count from top to bottom, we'll get seven carbon, however if we count from the second carbon, going left and then down, we'll get eight carbon. So the parent chain is octene

The double bond is located at the second carbon and the methyl groups are located on carbon 3 & 5. Since there are two methyl groups, we add di- in front of methyl to indicate two methyl groups present.

Note: The functional group has to be prioritise and it needed to be a part of the parent chain. In this case, the functional group is the double bond. (alkene)

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Which of the following reactions is not spontaneous? Cu (s) + 2HCl (aq) → CuCl2 (aq) + H2 (g) Mg (s) + 2HCl (aq) → MgCl2 (aq) +

grin007 [14]

Answer : The reaction not spontaneous is:

$Cu(s)+2HCl(aq)\rightarrow CuCl_2(aq)+H_2(g)$

Explanation :

The given reactions are the examples of single displacement reactions.

Single displacement reactions : It is defined as the reactions in which most reactive metal displaces the least reactive metal from its chemical reaction. The reactivity of metals is given by the series known as reactivity series.

That means the metals that lie above in the series can replace the metals which lie low in the reactivity series.

For the given options:

Option A :

$Cu(s)+2HCl(aq)\rightarrow CuCl_2(aq)+H_2(g)$

Copper lies low in the series than hydrogen and hence is less reactive. So, it will not displace hydrogen. Thus, this is a non-spontaneous reaction.

Option B :

$Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)$

Magnesium lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Option C :

$2Ni(s)+H_2SO_4(aq)\rightarrow Ni_2SO_4(aq)+H_2(g)$

Nickel lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Option D :

$2Al(s)+6HBr(aq)\rightarrow 2AlBr_3(aq)+3H_2(g)$

Aluminum lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Option E :

$Zn(s)+2HI(aq)\rightarrow ZnI_2(aq)+H_2(g)$

Zinc lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Hence, the reaction not spontaneous is:

$Cu(s)+2HCl(aq)\rightarrow CuCl_2(aq)+H_2(g)$

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