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 connected to a 240Vr.m.s has 3000…Hydrogen sulphide gas can act as?The primary of a transformer has 100 turns and its…A transformer has 400 turns of wire in the primary…A piece of filter paper moistened with lead (ll)…