What is the difference in colours of the Sun observed during sunrise/sunset and noon? Give explanation for each.

At noon, the Sun appears white in color because only little blue and violet color are scattered. In sunrise/sunset, light from the Sun near the horizon passes through different thicker layers of air and larger distance is travelled. So, the color of the Sun is reddish because of scattering of light and since Red color has highest wavelength and is scattered least.

Sun at noon is at overhead and travels shorter distance and is therefore white in color.