State with reason(s) whether the following statements are True [T] or False [F] Aluminium and copper are examples class 7

State with reason(s) whether the following statements are True [T] or False [F] Aluminium and copper are examples Class 7

State with reason(s) whether the following statements are True [T] or False [F] Aluminium and copper are examples of non-metals Class 7

Question 1.

Aluminium and copper are examples of non-metals used for making utensils and statues.

Answer:

[False] Aluminium and copper have the properties of malleability, lustrous, sonority. Metals have these properties, that is why aluminium and copper are metal.

Question 2.

Metals form oxides when combined with oxygen, the solution of which turns blue litmus paper to red.

Answer:

[False] Generally oxide of metals are basic in nature. Basic solution turn red litmus paper to blue. In acid solution, blue litmus paper turn red.

Question 3.

Oxygen is a non-metal essential for respiration.

Answer:

True

Question 4.

Copper vessels are used for boiling water because they are good conductors of electricity.

Answer:

[False] Copper is also good conductor of electricity. For boiling water, good conductor of heat is required and copper is a good conductor of heat.