BPSC – Combined Competitive Examination · ప్రశ్న 137
Which compound has been used to increase the octane rating of petrol?
సమాధానం చూపించు & వివరణ
సమాధానం: (C) Tetraethyl lead
వివరణ
Tetraethyl lead (TEL) reduces engine knocking and raises octane number; it has been phased out due to lead pollution.
- (A) తప్పు
Wrong: not the classic anti-knock additive.
- (B) తప్పు
Wrong: not a standard additive.
- (C) సరైనది
Correct: TEL was the classic anti-knock agent (now phased out for health reasons).
- (D) తప్పు
Wrong: not a standard additive.