Question

i) Which gas does come out effervescence in the big test tube?
ii) Why are bubbles seen in the small test tube?
iii) What is the colour change in the lime water ? Write the related equation.​

Answer 1

Explanation:

1. Carbon Dioxide is the gas produced with brisk effervescence.
2. The bubbles are seen in small test tubes due to evolving of gas H2
3. White,CO2(g) + Ca(OH)2(aq) -----> CaCO3(s) + H2O(l)

This reaction of carbon dioxide released by us with the limewater is the reason behind the change that we will observe. Lime water is also known as calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate turning its colour into white.

Answer 2

Answer:

1.carbon dioxide

2.due to evolving of gas H2

3.white

CO2(g) + Can(OH)2(aq) ---->CaCO3(s) + H2O(l)