Question

Paheli took a sample of distilled water and tested it with the help of a tester. She observed the
bulb did not glow. She then added a little amount of salt in the water, and tested it again. She observed that the bulb glowed this time. She also noticed some changes in the solution when the
current is passed through it.

The distilled water does not conduct electricity. Such solutions are called
(a) Good conductors
(b) Poor conductors
(c) Electrolytes
(d) None of these
The observations made by Paheli are
(a) Gas bubbles are formed.
(c) Temperature of the solution is changed.
(b) Metal is dissolved.
(d) None of these.
(iii) Which of these gases are produced in the process?
(a) Hydrogen and Nitrogen.
(b) Oxygen and Nitrogen.
(c) Oxygen and Hydrogen.
(d) Oxygen only
(iv)
When a burning splinter is brought near both the electrodes it will start burning more
brightly near the-
(a) Positive electrode
(b) Negative electrode
(c) Both of them
(d) None of them​

Answer 1

Answer

The distilled water does not conduct electricity. Such solutions are called

(b)Poor conductors

The observations made by Paheli are

a) Gas bubbles are formed.

Which of these gases are produced in the process?

c) Oxygen and Hydrogen.

When a burning splinter is brought near both the electrodes it will start burning more

b) Negative electrode