
In the given compound the lowest set of locants are:
(A) 3, 3, 4, 5
(B) 3, 4, 5, 5
(C) 4, 5, 3, 3
(D) None of these

Answer
489.6k+ views
Hint: Firstly, we should know what a locant is in order to solve this question and always the longest chain should be selected. As we know we should assign the possible lowest number to the carbon that has substituent.
Complete step by step answer:
Locant is the number of carbon on which the substituent is located. In this question we need the lowest locant set that is the sum of the number of carbon atoms on which the substituent are located should be low.
-we should select the longest chain.
This is the longest:
The other possible chains are mentioned in the below mentioned diagram which is the longest chain.
Thus, these are not the longest chain.
- We should assign the possible lowest number to the carbon that has substituent.
Will try number of trails and compare to arrive at correct answer:
Trail 1
Trail 2
- Write the locant of the structure trail 1 and trail
Trail 1: 3, 3, 4, 5
Trail 2: 3, 4, 5, 5
- Sum up all the locations obtained in trail 1 and 2:
Trail 1: 3, 3, 4, 5
= 3 + 3 + 4 + 5
=15
Trail 2: 3, 4, 5, 5
= 3 + 4 + 5 + 5
= 17
We need the least set of locants thus, option A is the correct option.
Note: Option C is 4, 5, 3, 3. Firstly obtaining this order of locants is impossible because in any chain number 3 will come first , then comes 4. But here the order itself is wrong. Thus, this option can be rejected in the place itself.
Complete step by step answer:
Locant is the number of carbon on which the substituent is located. In this question we need the lowest locant set that is the sum of the number of carbon atoms on which the substituent are located should be low.
-we should select the longest chain.
This is the longest:

The other possible chains are mentioned in the below mentioned diagram which is the longest chain.

Thus, these are not the longest chain.
- We should assign the possible lowest number to the carbon that has substituent.
Will try number of trails and compare to arrive at correct answer:
Trail 1

Trail 2

- Write the locant of the structure trail 1 and trail
Trail 1: 3, 3, 4, 5
Trail 2: 3, 4, 5, 5
- Sum up all the locations obtained in trail 1 and 2:
Trail 1: 3, 3, 4, 5
= 3 + 3 + 4 + 5
=15
Trail 2: 3, 4, 5, 5
= 3 + 4 + 5 + 5
= 17
We need the least set of locants thus, option A is the correct option.
Note: Option C is 4, 5, 3, 3. Firstly obtaining this order of locants is impossible because in any chain number 3 will come first , then comes 4. But here the order itself is wrong. Thus, this option can be rejected in the place itself.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Express the following as a fraction and simplify a class 7 maths CBSE

The length and width of a rectangle are in ratio of class 7 maths CBSE

The ratio of the income to the expenditure of a family class 7 maths CBSE

How do you write 025 million in scientific notatio class 7 maths CBSE

How do you convert 295 meters per second to kilometers class 7 maths CBSE

Write the following in Roman numerals 25819 class 7 maths CBSE

Trending doubts
State and prove Bernoullis theorem class 11 physics CBSE

What are Quantum numbers Explain the quantum number class 11 chemistry CBSE

Write the differences between monocot plants and dicot class 11 biology CBSE

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

State the laws of reflection of light

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE
