Chemical Effect...

Pure or distilled water is a/an

Which of the following liquids is a conductor of electricity?

Adding a soluble metallic salt to water

Directions: In this question, two statements are given labelled as A and B. Read both the statements and select the correct option accordingly.

Statement A: We prefer LED over bulb in testing the electrical conductivity of liquids.
Statement B: LED is used in place of bulb, which works on heating effect of current, because LED glows even when weak electric current flows in the circuit.

A tester is used to check the conductivity of liquids A and B. It is found that the tester glows brightly in case of liquid A, and dimmer in case of liquid B. This implies that

During electroplating, the pure metal is deposited at

In the process of purification of copper metal, a thin plate of pure copper and a thick rod of impure copper are used as electrodes, and a metal salt solution is used as the electrolyte.

Which electrode is connected to the positive terminal of the battery?

Pick the incorrect statement(s) from the following:

(A) The sugar solution is an electrolyte.
(B) Cations are negatively charged particles.
(C) Electrolytes produce ions when dissolved in water.
(D) A cycle rim is made of iron that is electroplated with chromium.

In electrolysis, the amount of mass deposited or liberated at an electrode is _____ the amount of charge passed through the electrolyte.

In a dry cell, leaking occurs because

A major drawback of the primary cell is that

During the charging process, the relative density of the electrolyte

The active materials on the positive and negative plates, respectively, of a fully charged lead-acid battery are

The electrolyte in the Leclanche`s cell is a moist paste of ammonium chloride, containing _____ chloride in a ____ cup.

Which of the following statements about electroplating is incorrect?

Which of the following statements is/are true?

(a) The passage of electric current through a conducting solution can cause a chemical reaction to take place.
(b) The passage of electric current through a conducting solution can cause a physical reaction.

We have distilled water in two plastic bottles labelled as A and B. We add hydrochloric acid to the water in bottle A and caustic soda to the water in bottle B. Which of the following will hold true?

Which of the following statements is true for the purification of copper?

A test lamp does not glow while testing the conductivity of a liquid. What does it imply?

Choose the incorrect statement(s) from the following:

(A) Ammonium chloride is used as the electrolyte in a dry cell.
(B) Man­ganese dioxide is used as a depolariser.
(C) Zinc chloride can be used as an electrolyte.
(D) Sodium chloride can also be used as a depolariser.