Question

1.You are given a hammer, a battery, a bulb, wires, and aswitch.

(a) How could you use them to distinguish between samples ofmetals and non-metals?
(b) Assess the usefulness of these tests in distinguishingbetween metals and non-metals

2. Give reasons

(a) Platinum, gold, and silver are used to make jewellery
(b)Aluminium is a highly reactive metal, yet it is used to makeutensils for cooking.​

Answer 1

Explanation:

Answer: (a) If the substance can be hammered to convert into sheets then it is metal if it is broken into pieces then it is non-metal. Set up the arrangement using bulb, battery, wire and switch as shown in figure. Place the substance between Point A and B if the bulb starts glowing then the substance is a Metal otherwise it is non-metal because metals are good conductor of electricity.

(b) Generally above methods can be used to identify metals and non-metals. But there are some exceptions also for example Sodium is metal which is not malleable in fact it is brittle. Graphite allotrope of non-metal carbon is a good conductor of electricity.

Answer 2

Explanation:

question 1 = answer b

question 2=answer a