Podcast
Questions and Answers
Which gas causes the limewater to turn milky or cloudy white?
Which gas causes the limewater to turn milky or cloudy white?
- Chlorine
- Hydrogen
- Oxygen
- Carbon dioxide (correct)
What is the observation when a glowing splint is held inside a test tube with hydrogen?
What is the observation when a glowing splint is held inside a test tube with hydrogen?
- Pop sound heard (correct)
- Limewater turns milky or cloudy white
- Paper turns white
- Splint relights
What inference can be made when damp litmus paper turns white in a test tube?
What inference can be made when damp litmus paper turns white in a test tube?
- Hydrogen is present
- Oxygen is present
- Chlorine is present (correct)
- Carbon dioxide is present
What happens when a lighted splint is held inside a test tube containing oxygen?
What happens when a lighted splint is held inside a test tube containing oxygen?
What causes the observation of a pop sound when a lighted splint is held near the mouth of a test tube containing hydrogen?
What causes the observation of a pop sound when a lighted splint is held near the mouth of a test tube containing hydrogen?
What gas reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate?
What gas reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate?
What is the purpose of carrying out a flame test?
What is the purpose of carrying out a flame test?
What happens when excess sodium hydroxide solution is added to a solution containing aluminium ions, calcium ions, and magnesium ions?
What happens when excess sodium hydroxide solution is added to a solution containing aluminium ions, calcium ions, and magnesium ions?
How are ions of group 1 metals (Li+, Na+, and K+) identified?
How are ions of group 1 metals (Li+, Na+, and K+) identified?
How are carbonate ions, CO32-, detected?
How are carbonate ions, CO32-, detected?
What happens when a few drops of dilute sodium hydroxide solution react with aluminium ions, calcium ions, and magnesium ions?
What happens when a few drops of dilute sodium hydroxide solution react with aluminium ions, calcium ions, and magnesium ions?
Why do ions of group 1 metals not form white precipitates with dilute sodium hydroxide solution?
Why do ions of group 1 metals not form white precipitates with dilute sodium hydroxide solution?
What is the effect of adding excess sodium hydroxide solution on the aluminium hydroxide precipitate?
What is the effect of adding excess sodium hydroxide solution on the aluminium hydroxide precipitate?
What is the main purpose of adding excess sodium hydroxide solution when testing for aluminium, calcium, and magnesium ions?
What is the main purpose of adding excess sodium hydroxide solution when testing for aluminium, calcium, and magnesium ions?
What is the significance of observing and recording the flame color during a flame test?
What is the significance of observing and recording the flame color during a flame test?
What is the purpose of testing for negatively charged carbonate ions?
What is the purpose of testing for negatively charged carbonate ions?
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