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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
The double bond between the two carbon atoms in ethylene consists of
  • A
    Two sigma bonds at right angles to each other
  • ✓
    One sigma bond and one pi bond
  • C
    Two pi bonds at right angles to each other
  • D
    Two pi bonds at an angle of ${60^o}$ to each other
✓

Answer

Correct option: B.
One sigma bond and one pi bond
b

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The table shown below gives the bond dissociation energies $({E_{diss}})$ for single covalent bonds of carbon $(C)$ atoms with element $A,\,\,B,\,\,C$ and $D.$ Which element has the smallest atoms
$Bond$ $E_{(diss)}(kJ(mol )^{(-1)})$
$C-A$ $240$
$C-B$ $328$
$C-C$ $276$
$C-D$ $485$
→
In a reaction

$C{H_2} = C{H_2}\xrightarrow[{oxid}]{{Hypochloro}}$ $M\xrightarrow{R}\begin{array}{*{20}{c}}
  {C{H_2} - OH} \\ 
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\end{array}$

Where $M$ = molecule; $R$ = reagent $M$ and $R$ are

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