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JEE Advanced 2021Paper 1
Exam
JEE Advanced
Year
2021
Paper
Paper 1
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JEE Advanced 2021 · Paper 1 · Chemistry · Some Basic Concepts of Chemistry

For the following reaction scheme, percentage yields are given...

For the following reaction scheme, percentage yields are given along the arrow: For the following reaction scheme, percentage yields are given along the arrow: x g and y g are mass of R and U , xg\mathbf{x} g and yg\mathbf{y} g are mass of R\mathbf{R} and U\mathbf{U}, respectively. (Use: Molar mass (in gmol−1\mathrm{g} \mathrm{mol}^{-1} )ofH,Cof \mathrm{H}, \mathrm{C} and O\mathrm{O} as 1,12 and 16 , respectively) The value of xx is ___.

Correct answer

0

Step-by-step solution

{Mg}_{2}{C}_{3}\overset{{H}_{2}O}{\to}Mg{( OH )}_{2} + \mathop{C 3 H 4 ( P )}_{Propyne( 4g )}<p><imgsrc="https://cdn−question−pool.getmarks.app/pyq/jeeadvanced/b25026a4−4733−473c−9ac7−d186e253f94b−image.png"style="width:600px;height:147px;"/></p><p>Now,onemoleofpropynegive,onemoleof<p><img src="https://cdn-question-pool.Quantrex.app/pyq/jee_advanced/b25026a4-4733-473c-9ac7-d186e253f94b-image.png" style="width: 600px; height: 147px;" /></p><p>Now, one mole of propyne give, one mole of2−butyne.-butyne.3molesofmoles of2−butynegiveonemoleofhexamethylbenzene.</p><p>Hence,-butyne give one mole of hexamethyl benzene.</p><p>Hence,40gofpropynegiveof propyne give54g to 2−butyne-butyne\left(100 %\right)butgiventhatbut given that75 %yeildandyeild and4gtopropyne.</p><p>Themassofto propyne.</p><p>The mass of2−butyneformed-butyne formed= 5 .4 \times \dfrac{75}{100} = 4 .05 g 162gto2−butynegiveto 2-butyne give162gof hexamethyl benzene \left(100 % yield\right)

But given that 4040 % yield, and 4.05gof24 . 05g of 2-butyne

The mass of hexamethyl benzene formed =4.05×40100=1.62g(x)</p>= 4 .05 \times \dfrac{40}{100} = 1 .62 g \left(x\right)</p>

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