1.Some crystals of copper sulphate were dissolved in water, formed which colour? Ans:blue colour 2.When dilute HCL added to zinc pieces, then what will happen? Ans: Small bubbles of H2 glass appear...
1. What is used as a moderator in a nuclear reactor? Ans: Graphite 2. Atoms are conpocom of which elements? Ans: Electrons and nuclei 3. What is the wavelength of visible spectrum? Ans: 3900-7600...