Question:
A sample of 4.5 mg of an unknown monohydric alcohol, R–OH was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be 3.1 mL. The molecular weight of the unknown alcohol is___ g/mol. [Nearest integer]
A sample of 4.5 mg of an unknown monohydric alcohol, R–OH was added to methylmagnesium iodide. A gas is evolved and is collected and its volume measured to be 3.1 mL. The molecular weight of the unknown alcohol is___ g/mol. [Nearest integer]
Updated On: Feb 2, 2024
Hide Solution
Verified By Collegedunia
Correct Answer: 33
Solution and Explanation
ROH+CH3MgI\(\rightarrow\)ROMgI+CH4(g)
moles of CH4 = moles of ROH
⇒ \(\frac{V^2}{2400}\)=\(\frac{m}{M.M}\) (Assuming NTP Condition )
⇒\(\frac{3.1}{22400}\)=\(\frac{4.5×10^{−3}}{M⋅M}\)
⇒MM=32.51
Nearest Integer = 33
moles of CH4 = moles of ROH
⇒ \(\frac{V^2}{2400}\)=\(\frac{m}{M.M}\) (Assuming NTP Condition )
⇒\(\frac{3.1}{22400}\)=\(\frac{4.5×10^{−3}}{M⋅M}\)
⇒MM=32.51
Nearest Integer = 33
Was this answer helpful?
0
0
Top Questions on Alcohols
- Which one of the following alcohols reacts instantaneously with Lucas reagent?
- Which of the following compounds has the highest boiling point?
What is the percentage of carbon in the product 'Z' formed in the reaction?
- An alcohol X (C\(_5\)H\(_{12}\)O) when reacted with conc. HCl and anhydrous ZnCl\(_2\), produces turbidity instantly. The alcohol X can be prepared from which of the following reactions?
- Which method will you use to seperate Methyl alcohol to acetone ?
View More Questions
Questions Asked in JEE Main exam
- If \( \sin x + \sin^2 x = 1 \), \( x \in \left(0, \frac{\pi}{2} \right) \), then the expression \[ (\cos^2 x + \tan^2 x) + 3(\cos^4 x + \tan^4 x + \cos^4 x + \tan^4 x) + (\cos^6 x + \tan^6 x) \] is equal to:
- JEE Main - 2025
- Trigonometric Identities
- The sum of the squares of all the roots of the equation \( x^2 + [2x - 3] - 4 = 0 \) is:
- JEE Main - 2025
- Quadratic Equations
- Let ABCD be a trapezium whose vertices lie on the parabola \( y^2 = 4x \). Let the sides AD and BC of the trapezium be parallel to the y-axis. If the diagonal AC is of length \( \frac{25}{4} \) and it passes through the point \( (1, 0) \), then the area of ABCD is:
- JEE Main - 2025
- Coordinate Geometry
- A molecule (P) on treatment with acid undergoes rearrangement and gives (Q). (Q) on ozonolysis followed by reflux under alkaline condition gives (R). The structure of (R) is given below. The structure of (P) is:
- JEE Main - 2025
- Organic Chemistry
- The product B formed in the following reaction sequence is: \[ {C}_6{H}_5{CN} \xrightarrow{{HCl}} (A) \xrightarrow{{AgCN}} (B) \]
- JEE Main - 2025
- Organic Chemistry
View More Questions
Concepts Used:
Alcohols
What is Alcohol?
Alcohol is a derivative of water (H2O) that has one, two, or more hydroxyl groups that are attached to a carbon atom of a hydrocarbon chain (an alkyl group). It is one of the most common organic compounds used in sweeteners, fragrances, and medicine.
Read More: Types of Alcohol
Uses of Alcohol:
- Ethanol is the alcohol used in alcoholic drinks. It can be used as an industrial methylated spirit where methanol is used very little in quantity as it can be dangerous.
- It is used as fuel to produce carbon dioxide and water by the process of fermentation. Whereas methanol burns carbon dioxide and water to facilitate combustion.
- Alcohol is an organic compound used as a solvent that is insoluble in water.
- It can be used to lower the level of sugar.
- Alcohol is used as a preservative in laboratories.