Question

Fill in the blanks.​

(a) Phosphorus is a very non-metal.
(b) Metals are conductors of heat and .
(c) Iron is reactive than copper.
(d) Metals react with acids to produce gas.​

Answer 1

(a)

Phosphorus is a very reactive non-metal.​

• Phosphorus is a highly reactive non-metal. So, it catches fire easily and hence used in matchsticks. ​

(b)

Metals are good conductors of heat and electricity.​

• Metals are good conductors of electricity and heat because they allow heat and electricity to pass through them.

(C) Iron is more reactive than copper.​

• ​Iron is more reactive than copper. Hence, it replaces copper from its salt solution (copper sulphate).​

$\text{Iron + Coppersulphate}\to \text{Iron sulphate + Copper}$

(d)

Metals react with acids to produce hydrogen gas.​

• The reaction of metals with acids produces hydrogen gas that burns with a ‘pop’ sound. ​

• For example, magnesium metal reacts with hydrochloric acid and produces hydrogen gas. ​