Question

1.Name two metals which are poor conductors of heat.
2.Give the name of constituent elements of duralumin.
3.what will be the change in colour of copper sulphate solution when magnesium is added to it?​

Answer 1

1.iron steel is the bad conducter of heat

Answer 2

Answer:

1.lead and mercury are the two metals which are poor conductors of heat.

2.addition to aluminium, the main materials in duralumin are copper, manganese and magnesium. For instance, Duraluminium 2024 consists of 91-95% aluminium, 3.8-4.9% copper, 0.3-0.9% manganese, 1.2-1.8% magnesium, <0.5% iron, <0.5% silicon.

3.Aqueous copper sulfate solution is blue from the colour of the hydrated Cu++ cations and since the sulfate anion is colourless. The colour of the copper sulfate does not change during the reaction with magnesium metal.