Iron reacts with blue vitriol to give green vitriol and reddish-brown metal. Green vitriol and the respective metal is:
(a) Ferrous sulphate, Copper
(b) Copper sulphate, Silver
(c) Ferrous sulphate, Silver
(d) Copper sulphate, Copper

[ou.03jthe pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, star 1, star 2, and star 3. intensity intensity- intensity- 1000 3500 6000 8500 11000 wavelength (a) star 1 1000 3500 6000 8500 11000 1000 3500 6000 8500 11000 wavelength (a) wavelength (a) star 2 star 3 which of these statements is correct about the color of the three stars? star 2 is white in color o star 2 is yellow in color star 1 and star 3 are yellow in color star 1 and star 3 are white in color