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9. Hydricarbon — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
The organic compound used as antiknock agent in petroleum is
  • ✓
    ${({C_2}{H_5})_4}Pb$
  • B
    $TNT$
  • C
    $C{H_3}MgBr$
  • D
    ${({C_2}{H_5})_2}Hg$
✓

Answer

Correct option: A.
${({C_2}{H_5})_4}Pb$
a
This abnormal combustion produces a specific type of sound, which we call knocking.

Knocking has adverse effects. It results in early wear-and-tear of the piston. Carbon is deposited in the inner part of the cylinders [Internal Combustion Engines have cylinders, inside which pistons move]. Also, Efficiency is reduced.

So we want to reduce knocking. We add something which can reduce it. Such substances are called Anti - knockingAgents.

A popular anti-knocking agent was Tetra Ethyl Lead (TEL) $\left( C _2 H _5\right)_4 Pb$.

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