7. How can you remove the hard calcium carbonate layer of the egg without damaging its semipermeable membrane? Can this egg be inserted into a bottle with a narrow neck without distorting its shape? Explain the process involved.
Solution : (i) When egg is placed in dilute mineral acid solution (preferably dilute HCl solution), the hard external `CaCO_(3)` layer of the egg dissolves out / removed without damaging its semi - permeable membrane. <br> (ii) Yes, this egg can be inserted into a bottle with a narrow neck without distorting is shape.
