Reduction with fron. Reduction with iron,
rock melt
sodium chloride
Nact
Electrolysis
Sodium is in group of the periodic Table
(1)
State one physical property of group i elements
Thein dort anko in lam that they
...and
Sodium metat reacts readily with cold water.
Write a balanced equation for this reaction.
24CM
12)
In an experiment, on found to displace copper from its compound
Cuso, (aq) Fe (al Feso, (mg) Outs)
Explain what this experiment shows about the reactivity of iron and copper,
11
Zinc is found to be more reactive than iron
Table in order of reactivity. Start from the most​

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.