Oquizy

After adding HCl and barium nitrate, a white precipitate forms. What confirms the identity?

Blue solution confirms copper Effervescence confirms carbonate Precipitate dissolves in excess acid Precipitate is insoluble in acid

Zinc and lead both form white ppt with NaOH. How can they be distinguished?

Add excess NaOH: zinc dissolves, lead remains Add NaOH: only lead dissolves Add NH₃: only lead dissolves Flame test: both give red flame

Both form white precipitates with sodium hydroxide. How can John distinguish them?

Add HCl – both turn blue Add more NaOH – aluminium dissolves, zinc does not Add more NaOH – zinc dissolves, aluminium does not Add NH₃ – both give brown precipitate

Which of the following correctly identifies the test result for chloride ions?

Effervescence with HCl White precipitate with AgNO₃ White precipitate with Ba(NO₃)₂ Yellow precipitate with AgNO₃

Which chemical is used to test for carbonate ions?

Barium nitrate Dilute hydrochloric acid Silver nitrate Sodium hydroxide

Which of the following confirms the presence of hydrogen gas?

Damp red litmus paper turns blue Glowing splint relights Lighted splint gives a 'pop' sound Limewater turns milky

Quiz: Chemistry - Qualitative Analysis