Oquizy

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

A student adds dilute HCl to a white solid. Effervescence occurs. What does this confirm?

Carbonate present Chloride present No conclusion Sulfate present

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

How does cold, acidified potassium manganate(VII) react with unsaturated compounds?

Bubbles are released Purple colour decolourises Purple colour remains Solution turns blue

Which test confirms the presence of carbon dioxide?

Damp red litmus turns blue Glowing splint relights Lighted splint gives pop Turns limewater milky

Xinyi has 3 test tubes each with gas samples: A (turns limewater milky), B (relights glowing splint), C (pungent smell turns red litmus blue). The labels are missing from the test tubes. Which gases are in tubes A, B, and C?

A: CO₂, B: H₂, C: NH₃ A: CO₂, B: O₂, C: NH₃ A: NH₃, B: CO₂, C: O₂ A: O₂, B: H₂, C: CO₂

Quiz: Chemistry - Qualitative Analysis