Download App

9. Hydricarbon — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
Which sequence of steps describes the best synthesis of $2-$ phenylpropene ?
  • A
    Benzene $+ 2-$ chloropropene , $AlCl_3$
  • B
    $1.$ Benzaldehyde $(C_6H_5CH = O) + CH_3 CH_2MgBr$, diethyl ether

    $2.$ $H_3O^+$

    $3 .$  $H_2SO_4$ , heat

  • C
    $1.$ Bromobenzene $+ Mg,$ diethyl ether     

    $2.$ Propanal $(CH_3CH_2CH = O)$

    $3.\, H_3O^+$

    $4.\, H_2SO_4$ , heat

  • ✓
    $1.$ Bromobenzene $+ Mg$, diethyl ether

    $2.$ Acetone $[(CH_3)_2C =O]$

    $3.\, H_3O^+$

    $4.\, H_2SO_4$ , heat

✓

Answer

Correct option: D.
$1.$ Bromobenzene $+ Mg$, diethyl ether

$2.$ Acetone $[(CH_3)_2C =O]$

$3.\, H_3O^+$

$4.\, H_2SO_4$ , heat

d

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 9. Hydricarbon→9. Hydricarbon — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

In which of the following species, $d-$ orbitals having $xz$ and $yz$ two nodal  planes involved in hybridization of central atom?
→
The strongest reducing agent is
→
The enthalpy of vapourization of a liquid is $30\,kJ\,mo{l^{ - 1}}$ and entropy of vapourization is $75\,J\,mo{l^{ - 1}}\,K$. The boiling point of the liquid at $ 1\, atm$  is.......$K$
→
Which one of the following reactions would be the best for the formation of $2-$   bromobutane

$(1)$ $C{H_3}CH = CHC{H_2}C{H_3}$  $  \xrightarrow{HBr}  $

$(2)$ $C{H_3}C{H_2}CH = C{H_2}$  $  \xrightarrow{HBr}  $

$(3)$ $C{H_3}CH = CHC{H_3}$   $  \xrightarrow{Br_2}  $

$(4)$ $C{H_3}C{H_2}CH = C{H_2}\mathop {}\limits_{{\rm{}}} $  $  \xrightarrow[Proxide]{HBr}  $

→
What should be the weight of $50\%$ $HCl$ which reacts with $100\, g$ of limestone ............. $\% \mathrm{pure}$ 
→
Taking into account of hybridization and resonance effects, rank the following bonds in order of decreasing bond length. 

→
Which of the following compound is achiral ?
→
How much % sulphur is present in organic compound if on analysis $0.53 \,gm$ of this compound gives $1.158\, gm$ of $BaS{O_4}$
→
Uncertainity in position of an electron and helium atom is same. If uncertainity in momentum of electron is $32 \times 10^5$  then uncertainity in momentum of helium atom is
→
The enthalpies of combustion of carbon and carbon monodie are $-393.5$  and $-283 \,kJ\, mol^{-1}$  respectivley. The enthalpy of formation of carbon monoxide per mole is.......$kJ$
→