Question

☆ Correct and rewrite the following statements:

Answer 1

Answer:

a)

Question:-

• Rubber is a good conductor of electricity.

Answer:-

• It's incorrect sentence.
• As we know that, rubber are an insulators of electricity, and they do not not have free ions which can help in conducting electricity.

So correct sentence is:

• Rubber is a bad conductor of electricity.

b)

Question:-

• Electroplating wastes are useful to human health and environment.

Answer:-

• It's incorrect sentence.
• As we know that, electroplating of substances releases harmful and toxic substances into the environment causing serious health issues in human, so it's waste substances released into environment can have very harmful effects.

So correct sentence is:

• Electroplating wastes are harmful to human health and environment.

c)

Question:-

• In an LED bulb, the shorter lead is connected to the positive terminal of the battery.

Answer:-

• It's incorrect sentence.
• As we know that, in an LED bulb their are two terminals that is the positive and the negative. So here the lead connected to the positive terminal is always slightly longer than the lead connected to negative terminal of the bulb.

So correct sentence is:

• In an LED bulb, the longer lead is connected to the positive terminal of the battery.

d)

Question:-

• Pure water conducts electricity.

Answer:-

• It's incorrect sentence.
• As we know that, pure water is a form of H2O where Hydrogen (H) is positive ion and Oxygen (O) is a negative ion which can conduct electricity when they are in individuals but as in pure water they are in combined form of compound H2O in which they become neutral and can't conduct any electricity.

So correct sentence is:

• Pure water can't conduct electricity.