chemical effects of electric current class 8

Acids are good conductors of electricity

• true

• false

Tags

NGSS.MS-PS2-3

2.Water containing which of the following substances may conduct electricity

• salt

• sugar

Tags

NGSS.MS-PS2-3

3.Why does the bulb glow when the electric current passes through it

• due to the heating effect of the current

• due to the magnetic effect of the current

• both A and B

• None of the above

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

THERE ARE 2 WIRES CALLED LEADS ATTACHED TO THE LED.One lead is slightly longer than the other.

• true

• false

5.Does the compass needle show deflection for lemon juice

• yes

• no

6.Does the compass needle show deflection of tap water

• yes

• no

7.Lemon juice is --------------conductor

• good

• bad

Tags

NGSS.MS-PS2-3

8 .Milk is a -------------conductor.

• good

• bad

Small amount of mineral salts present naturally in water are beneficial for human health .

• truue

• false

10.The liquids that conduct electricity are solutions of acids,bases and salts in water

• true

• false

Tags

NGSS.MS-PS1-2