5 (a) Explain why copper (I) sulphate solution looks blue when placed in sunlight
(b) What are the sources of the followme radiations?
- Visible radiation
Trenal
- Ultraviolet radiation
(0) Draw a schematic diagram of ble spectrometer.
(a) Why are group I elements
(1) Univalent
(ii) Largely ionic
(1) Strongly reducing agents
C) Give equations to show the rea lion between sodium and
(H20 (11) H(111)
-1 (a) Define molar volume
(b) Find the volume occupied by 3. mg of chlorine gas at room temperature and
Pressure (molar volume = 22.
4 C 1 = 35.5).
(c) Calculate the percentage by mnus of calcium in the compound Caro
(Ca = 40, C = 12,0 = 1)
tween sodium and
w

The allotropes of carbon include a variety of structures that include three-dimensional tetrahedral lattices, planes of hexagonal rings, cylindrical tubes of hexagonal rings, and spheres of five- and six-membered rings. similar shapes of network covalent atomic solids are possible with carbon nitride, boron, and pure silicon (e.g., silicene is a graphene-like allotrope of pure silicon). in contrast, silicates exist as either highly ordered or amorphous (more random) three-dimensional lattices. what could explain why there are there no naturally occurring sheets, stacked sheets, cylindrical tubes, or spheres of network covalent atomic solids composed of silicon and oxygen (sio2)? would pure silicate structures make good lubricants or good electrical conductors?