When you add a few drops of acetic acid to a test-tube containing sodium bicarbonate powder, which one of the following is your observation?
When you add a few drops of acetic acid to a test-tube containing sodium bicarbonate powder, which one of the following is your observation?
Options
When acetic acid is added to sodium bicarbonate powder, carbon dioxide gas is released with brisk effervescence. The reaction is as follows: CH3COOH + NaHCO3 CH3COONa + H2O + CO2
Marking Scheme
- 11 mark
Hint
Recall the reaction between acids and bases, and the properties of carbon dioxide gas.
Quick Oral Answer
When acetic acid is added to sodium bicarbonate powder, carbon dioxide gas is released with brisk effervescence. This is because the acid reacts with the base to form a salt, water, and carbon dioxide gas.
Analysis & Explanation
The correct answer is D because the reaction between acetic acid and sodium bicarbonate produces carbon dioxide gas, which is colourless and odourless. The other options are incorrect because they describe different reactions or observations.
Common Mistakes
- 1Confusing the reaction with other acid-base reactions
- 2Misidentifying the gas released
Interesting Facts
Carbon dioxide is a common product of acid-base reactions
Sodium bicarbonate is commonly used in cooking and as an antacid
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2017?
This question carries 1 mark in the CBSE Class 10 Science 2017 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Acids, Bases and Salts" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Chemical Properties of Acids and Bases" from CBSE Class 10 Science.
Has this question appeared in other CBSE Science papers?
Yes, a similar question appeared in the 2017 CBSE Class 10 Science paper.
What type of question is this in the CBSE Class 10 Science 2017 paper?
This is a MCQ question from Section B in the CBSE Class 10 Science 2017 paper.