Question

A mark at the bottom of a beaker is focused by a microscope. On pouring water up to a height of 16cm, the microscope is raised through 4cm to focus the mark again. Refractive index of water is:

Answer 1

Explanation:

A chelate is a chemical compound composed of a metal ion and a chelating agent. A chelating agent is a substance whose molecules can form several bonds to a single metal ion. In other words, a chelating agent is a multidentate ligand. An example of a simple chelating agent is ethylenediamine.

Answer 2

ANSWER = 4/3

EXPLAINATION = Let = h [ height ]

                                       u [ refractive index ]

                            the real depth of water . the apparent will be

                                      height/refractive index

                                      h - h/u = h{1 - 1/u}

                                               4 = h {1 - 1/u}

                                               4 = 16{ 1 - 1/u}

                                          4/16 = 1 - 1/u

                                           1/4 = 1 - 1/u

                                        1 - 1/4 = 1/u

                                            3/4 = 1/u

                                            4/3 = u