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PART - 2 CH - 8 Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryPART - 2 CH - 8 Organic Chemistry: Some Basic Principles and Techniques5 Marks
Question
What is hyperconjugation? Explain with example and with help of this explain the stability of carbocations and alkenes.
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Ethyl acetate is formed by the reaction of ethanol and acetic acid and the equilibrium is represented as:
$
CH_3 COOH(l)+C_5 H_5 OH(l) \rightleftharpoons CH_3 COOC_2 H_5(l)+H_2 O(l)
$
a. Write the concentration ratio (reaction quotient), $Q _{ C }$, for this reaction (note: water is not in excess and is not a solvent in this reaction)
b. At 293 K , if one starts with 1.00 mol of acetic acid and 0.18 mol of ethanol, there is 0.171 mol of ethyl acetate in the final equilibrium mixture. Calculate the equilibrium constant.
c. Starting with 0.5 mol of ethanol and 1.0 mol of acetic acid and maintaining it at $293 K, 0.214$ mol of ethyl acetate is found after some time. Has equilibrium been reached?
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Draw the Lewis structures for the following molecules and ions:
$\text{H}_2\text{S},\ \text{SiCl}_4,\ \text{BeF}_2,\ \text{CO}^{2-}_3,\ \ \text{HCOOH}$
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Match the species in Column I with the type of hybrid orbitals in Column II.
 
Column I
 
Column II
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SF4
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sp3d2
ii.
IF5
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d2sp
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sp3d
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 $\text{NH}^{+}_{4}$
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Which elements have the following electronic configurations? (Use only the periodic table.)
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1. Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?
2. How does
i. an electron withdrawing group (EWG) and
ii. an electron donating group (EDG) influence the acid strength of carboxylic end?
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Balance the following ionic equations.
$\text{MnO}^{-}_4+\text{SO}^{2-}_3+\text{H}^+\xrightarrow{ \ \ \ \ \ \ \ \ \ }\text{Mn}^{2+}+\text{SO}^{2-}_4+\text{H}_2\text{O}$
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Explain the applications of Fajan's law.
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Choose the correct answer.
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Calculate the enthalpy change for the process

$\text{CCI}_4(\text{g})\xrightarrow{ \ \ \ \ \ }\text{C}(\text{g})+4\text{CI}(\text{g})$

and calculate bond enthalpy of C – Cl in CCl4(g).

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