Question

C. Give reasons for the following.
1. Why is sodium stored in kerosene and not in water?
2. What property makes graphite or charcoal suitable to be used inside a pencil?
3. What is a solder? What property of solder makes it suitable for joining electrical wires?
4. Can the solution of copper sulphate be stored in an iron container?
5. Can a wire be drawn out of wood?​

Answer 1

tienes que traducir todo eso sí lo quieres solucionar

Explicación:

te recomiendo buscar a alguien que te ayude a traducirlo de inglés a español

lo siento mucho

Answer 2

1

1Why is sodium stored in kerosene and not in water?

It is an exothermic reaction. Sodium metal heats up and can ignite and burn resulting in a characteristic orange flame. Hydrogen gas released during the burning process reacts strongly with oxygen in the air.

2What property makes graphite or charcoal suitable to be used inside a pencil?

Graphite is one of the polymorphic forms in which carbon can occur in nature. Other shapes are diamond, chaoite, and lonsdaleite. At atmospheric pressure and room temperature the most stable polymorph is graphite. However, the transformation of diamond into graphite is so extremely slow that it is only noticeable on a geological scale.

3 What is a solder? What property of solder makes it suitable for joining electrical wires?

in control.

Excessive amount of filler metal.

Use of filler metal very close to the upper limit of its temperature range.

Unsuitable filler metal.

Whiskering: [4] In electronic welding, it is said of the spontaneous growth of threads between close welds with the consequent risk of short circuits. It was first observed in valve electronics where pure tin solders were used. The addition of lead to create a Tin-Lead alloy mitigated this problem for decades. Recent environmental legislation regarding lead-free soldering would have raised the problem again and led to exceptions to the law on equipment for medical and military use.

Security measures Edit

In the soft soldering processes the following security measures will be taken into account

4Can the solution of copper sulphate be stored in an iron container?

The reason why it will be possible to store a copper sulfate solution in a metallic zinc or silver container is because they are two metals that do not react with copper sulfate and therefore maintain their stable internal conditions.

5Can a wire be drawn out of wood?