On exposure to hydrogen sulphide; moist lead (II) ethanoate paper turns by Sunday | Apr 20 | Chemistry NECO | 0 comments A. black B. blue C. green D. white E. yellow Correct Answer: Option A – black Users Also Read These:A transformer is rated 240V. If the primary coil is…A transformer has 400 turns and 200 turns in the…An electrical device has 50 turns in its primary…The primary coil of a transformer has N turns and is…A transformer connected to a 240Vr.m.s has 3000…