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Electricity and Chemistry Online Exam Quiz

Important questions about Electricity and Chemistry. Electricity and Chemistry MCQ questions with answers. Electricity and Chemistry exam questions and answers for students and interviews.

Electricity is measured through a device called as


A : a. Ammeters

B : b. Voltmeters

C : c. Barometers

D : d. Anemometers

Any reaction at an anode involves


A : a. gain of electrons

B : b. loss of electrons

C : c. gain or loss depends upon the electrolyte

D : d. formation of gases

Aluminum (Al) is preferred in overhead power cables because


A : a. it is a good conductor

B : b. it acts as an insulator, in case of lightening

C : c. it prevents accidents

D : d. it is lighter in weight

Reactivity series of metals is also called as the


A : a. preferential series

B : b. electrochemical series

C : c. electrolytic series

D : d. selective discharge series

If molten Lead Bromide (PbBr?) is electrolyzed,


A : a. at anode, brown fumes of bromide gas are given off

B : b. at anode, molten lead can be seen

C : c. at cathode, brown fumes can be seen

D : d. at cathode, lead bromide can be seen

Difficulty of discharge is highest in


A : a. calcium ions

B : b. copper ions

C : c. lead ions

D : d. silver ions

Difficulty of discharge is lowest in


A : a. potassium ions

B : b. sodium ions

C : c. copper ions

D : d. silver ions

In electrolysis of concentrated HCl, at cathode


A : a. oxygen gas is given off

B : b. hydrogen gas is given off

C : c. chlorine gas is given off at anode

D : d. hydrogen chloride is given off

In electrolysis of brine, ions moving to anode include


A : a. sodium + hydrogen ions

B : b. hydroxide + Chloride ions

C : c. sodium + hydroxide ions

D : d. chloride ions + hydrogen gas

A suitable constant flow of electricity can be ensured through


A : a. an ammeter

B : b. a rheostat

C : c. a voltmeter

D : d. a galvanometer

Battery is


A : a. 99.5% pure copper

B : b. collection of cells

C : c. pure lead

D : d. pure zinc

Weak electrolytes include


A : a. limewater Ca(OH)?

B : b. ammonia solution NH?

C : c. Carbonic acid H?CO?

D : d. all of these

A non-electrolyte


A : a. does not conduct electricity

B : b. is a covalent substance

C : c. does not form ions

D : d. all of these

Ethanoic acid (CH?COOH) is included in


A : a. strong electrolyte

B : b. non-electrolyte

C : c. weak electrolyte

D : d. good conductors

Examples of non-conductors include


A : a. sulphur

B : b. phosphorus

C : c. wood

D : d. all of these

Cations are


A : a. positively charged ions

B : b. negatively charged ions

C : c. travel towards anode during electrolysis

D : d. travel towards anode during polarization

Duration of bright-bulb is shorter in a magnesium-copper battery because


A : a. the difference of copper ad magnesium in reactivity series is lesser

B : b. the polarization occurs too quickly

C : c. magnesium is highly reactive and dissolves very rapidly in acid

D : d. all of these

Polarization occurs due to


A : a. rapid dissolving of magnesium in dilute acid

B : b. slow dissolving of magnesium in conc. Acid

C : c. copper electrode gets covered with bubbles of hydrogen gas

D : d. copper electrode gets covered with bubbles of ammonia gas

Conventionally, negative terminals is shown as


A : a. a long thin line

B : b. a short fat line

C : c. a long wavy line

D : d. a short wavy line

Electricity is not conducted by


A : a. plastic

B : b. non-metals

C : c. solid ionic substances

D : d. all of these

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