ELECTROLYSIS AND STORAGE BATTERIES QUIZ

specific gravity of H₂SO₄ decreases

its cathode becomes dark chocolate brown in colour

it gives out energy

its voltage increases

All of the listed here

Dilute H₂SO₄

Concentrated H₂SO₄

Water

concentrated sulphuric acid

kOH

dilute sulphuric acid

NaOH

All of these

Flat discharge current-voltage curve

High power to weight ratio

Comparatively longer shelf life under adverse conditions of high temperature and humidity

Two electrodes of different meta’s should be inserted in the electrolyte, not touching each other

All of the listed here

Electrolyte must chemically react with one of the electrodes

Electrolyte liquid or paste should be conducting

excessive gassing under load conditions

excessive drop in the specific gravity of electrolyte even when the cell is on open circuit

none of the listed here

both of the listed here

A storage cell has a reversible chemical reaction

A primary cell has an irreversible chemical reaction

A lead-acid cell can be recharged

A carbon-zinc cell has unlimited shelf life

always less than one

none of the listed here

just one

always greater than one

hydrometer

a mechanical gauge

psychrometer

manometer

to allow gases out when the cell is on charge

all of the listed here

to add water to the cell if needed

to check the level of electrolyte