A They are not needed now as anti-knock agents
B They tower the efficiency of the engine
C They cause less pollution
D To reduce the cost of petrol
CHEMISTRY Mcqs for Test Preparation from Basic to Advance:
Chemistry Mcqs are from the different sections of Chemistry Subject. Here you will find Mcqs of Chemistry from Basic to Advance. Which will help you to get higher marks in Chemistry portion of test. These Mcqs are useful for students and job seekers i.e MCAT ECAT ETEA test preparation, PPSC Test, FPSC Test, SPSC Test, KPPSC Test,BPSC Test, PTS ,OTS,GTS,JTS,CTS.
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