In this post, you will find NCERT Class 10 Science Activity 2.8 Explanation in detail. This activity is based on Chapter 2 Acids, Bases, and Salts of Class 10 Science.
NCERT Class 10 Science Activity 2.8 Explanation
Aim of Activity
2.8
To find whether all compounds containing hydrogen are acidic and conduct electricity
Activity-Take solution of
glucose, alcohol, hydrochloric acid, sulphuric acid, etc.
· Fix
two nails on a cork, and place the cork in a 100 ml beaker.
· Connect
the nails to the two terminals of a 6-volt battery through a bulb and a switch, as shown in fig...
· Now
pour some dilute HCl in the beaker and switch on the current.
· Repeat
with dilute sulphuric acid.
· What
do you observe?
· Repeat
the experiment separately with glucose and alcohol solutions. What do you
observe now?
· Does
the bulb glow in all cases?
 |
| Solution of acid conducts electricity |
Observation-
The bulb will start glowing in the case
of acids but glucose and alcohol solutions do not conduct electricity because
they do not produce ions in water.
Conclusion- The glowing bulb indicates that there is
a flow of electric current through the solution. The electric current is
carried through the solution by ions.
Activity 2.8 Class 10 Science Explanation Video
FAQs
1. Which solutions are used in activity 2.8 class 10 science?
Ans – Hydrochloric acid, sulphuric
acid, glucose, and alcohol are used in activity 2.8 class 10 sciene.
2. Does the bulb glow when an acidic solution is used in activity 2.8 class 10 science?
Ans – Yes, the bulb glows when the acidic
solution is used in activity 2.8.
3. What is the aim of activity 2.8 class 10 science?
Ans To find whether all compounds containing
hydrogen are acidic and conduct electricity
4. Why does the bulb glow with acidic solutions?
Ans – Acidic solutions contain free
ions that carry electric current, so the bulb glows.
5. What does the glowing bulb in activity 2.8 class 10 science
indicate?
Ans – The glowing bulb indicates
that there is a flow of electric current through the solution.
6. Why does electric current flow in an acidic solution in activity
2.8 class 10 science?
Ans – Ions present in the acidic
solution carry electric current.
Related Topics -
1. Activity 2.9
2. Activity 2.7
