IUPAC name of the following compound is:
Phenoxy-2-methylpentane
Step 1: Identifying the Functional Group and Parent Chain
- The given structure consists of a benzene ring attached to an alkoxy (-O-R) group.
- The longest alkyl chain attached to the oxygen atom is pentane (C\(_5\)H\(_{11}\)), making it a pentoxy (-O-C\(_5\)H\(_{11}\)) derivative.
Step 2: Identifying Substituents and Their Positions
- A methyl (-CH\(_3\)) group is present on the fourth carbon of the pentoxy chain.
- The oxygen is directly attached to the benzene ring, making it an alkoxybenzene.
Step 3: Naming the Compound
- The correct IUPAC name follows the alkoxybenzene convention, with the longest chain numbered from the oxygen atom.
- Since the methyl group is at the 4th position, the correct name is 4-Methyl pentoxybenzene.
Step 4: Evaluating the Given Options
- Option (1): Incorrect, as the methyl group is at position 4, not 2.
- Option (2): Correct, as 4-Methyl pentoxybenzene is the correct name.
- Option (3): Incorrect, as the functional group should be named as "alkoxybenzene," not "phenoxyalkane."
- Option (4): Incorrect, as the methyl group is at position 4, not 2.
Thus, the correct answer is
Option (2).
The reagent 'X' used in the following reaction to obtain a good yield of the product is:
The \( C-O-H \) bond angle in A is \( X \) and \( C-O-C \) bond angle in B is \( Y \). What are X and Y?
List I | List II | ||
(P) | ![]() | (1) | ![]() |
(Q) | ![]() | (2) | ![]() |
(R) | ![]() | (3) | ![]() |
(S) | ![]() | (4) | ![]() |
(5) | ![]() |
List I | List II | ||
(P) | ![]() | (1) | ![]() |
(Q) | ![]() | (2) | ![]() |
(R) | ![]() | (3) | ![]() |
(S) | ![]() | (4) | ![]() |
(5) | ![]() |
Given the vectors:
\[ \mathbf{a} = \mathbf{i} + 2\mathbf{j} + \mathbf{k} \]
\[ \mathbf{b} = 3(\mathbf{i} - \mathbf{j} + \mathbf{k}) = 3\mathbf{i} - 3\mathbf{j} + 3\mathbf{k} \]
where
\[ \mathbf{a} \times \mathbf{c} = \mathbf{b} \]
\[ \mathbf{a} \cdot \mathbf{x} = 3 \]
Find:
\[ \mathbf{a} \cdot (\mathbf{x} \times \mathbf{b} - \mathbf{c}) \]
If three numbers are randomly selected from the set \( \{1,2,3,\dots,50\} \), then the probability that they are in arithmetic progression is:
A student has to write the words ABILITY, PROBABILITY, FACILITY, MOBILITY. He wrote one word and erased all the letters in it except two consecutive letters. If 'LI' is left after erasing then the probability that the boy wrote the word PROBABILITY is: \