हिंदी

Does pure water conduct electricity? If not, what can we do to make it conducting? - Science

Advertisements
Advertisements

प्रश्न

Does pure water conduct electricity? If not, what can we do to make it conducting?

लघु उत्तरीय

उत्तर

Pure water does not conduct electricity because essential mineral salts are not found in pure water. To make pure water a conductor of electricity, we add dilute sulphuric acid or salt to it. These are added as impurities in water, due to which these substances combine with water and produce ions, and thus the water conducts electricity.

shaalaa.com
Conductor of Electricity: Liquid
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 14: Chemical Effects of Electric Current - Exercises [पृष्ठ १८१]

APPEARS IN

एनसीईआरटी Science [English] Class 8
अध्याय 14 Chemical Effects of Electric Current
Exercises | Q 6 | पृष्ठ १८१

संबंधित प्रश्न

Most liquids that conduct electricity are solutions of ________, _______ and ________.


When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?


The bulb does not glow in the setup shown in figure list the possible reasons. Explain your answer.


In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.


A child staying in a coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Can you explain the reason?


Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.


Which one of the following solutions will not conduct electricity?


Observe the circuit given in the figure.

Boojho set up this circuit for purification of copper. What will be the nature of – (a) plate A (b) plate B (c) and the solution.

Explain the process of purification.


Boojho made the circuit as shown in the figure. He wanted to observe what happens when an electric current is passed through water. But he forgot to add a few drops of lemon juice to water. Will it make any difference to his observations? Explain.


Observing that the bulb does not glow in the circuit shown in Fig. (A) Boojho changed the circuit as shown in Fig. (B). He observed deflection in the magnetic compass.

A B
  1. What does the deflection in magnetic compass indicate?
  2. Why did the bulb not glow in Fig. (A)?
  3. What would be the effect of increase in the number of turns in the coil wound around the magnetic compass in Fig. (B)?
  4. What will be observed if the number of cells are increased in the circuit shown in Fig. (B)?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×