PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoRead the below given experiment and answer the following question:
Four experiments were performed using two test tubes connected by a delivery tube. In each experiment, the gas formed in the first test tube was passed into lime water kept in the second test tube.
Experiment (a): Vinegar + baking soda
Experiment (b): Lemon juice + vinegar
Experiment (c): Vinegar + common salt
Experiment (d): Lemon juice + baking soda
1. Which experiment(s) will turn the lime water milky?
2. Why was a delivery tube used between the two test tubes?
3. A student says:
"Experiments (b) and (c) are also chemical reactions because two substances are mixed."
Which response is scientifically correct?
4. A student wants to prove that the gas produced in Experiment (a) is carbon dioxide and not oxygen.
Which observation gives the strongest evidence?
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