Question 20 - MCQs from NCERT Exemplar - Chapter 2 Class 10 - Acids, Bases and Salts

In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus (Figure 2.1) was set up. Which among the following statement(s) is(are) Correct?

(i) Bulb will not glow because electrolyte is not acidic

(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.

(iii) Bulb will not glow because circuit is incomplete

(iv) Bulb will not glow because it depends upon the type of electrolytic solution

(A) (i) and (iii) 

(B) (ii) and (iv)

(C) (ii) only 

(D) (iv) only

Answer

NaOH is an electrolyte . On dissolution in water, 

• it will ionize i.e. produce ions. 
• Therefore, the solution will conduct electricity and the bulb will glow.

Both acids and bases can act as electrolytes.

So, the correct answer is (c) (ii) only