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 has 400 turns of wire in the primary…The primary coil of a transformer has N turns and is…A transformer with 5500 turns in its primary winding…The primary of a transformer has 100 turns and its…A piece of filter paper moistened with lead (ll)…