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