which compound is added to petrol to prevent engines from 'knocking' - Science - Pollution of Air and Water

Question

which compound is added to petrol to prevent engines from
'knocking'?

Mushtaq · Accepted Answer

TEL i e Tetraethyl lead is added to petrol as an antiknocking
agent

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https://www meritnation
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which compound is added to petrol to prevent engines from 'knocking'?