Joseph Priestley observed that when mouse alone was placed in a closed bell jar with burning candle, it was suffocated and burning candle extinguished, but when mouse was placed with a mint plant in the same bell jar, that mouse stayed alive and candle continued to burn. What he concluded from this experiment?

Question

Joseph Priestley observed that when mouse alone was placed in a closed bell jar with burning candle, it was suffocated and burning candle extinguished, but when mouse was placed with a mint plant in the same bell jar, that mouse stayed alive and candle continued to burn. What he concluded from this experiment? (A) Burning candle removed the air (B) Mint plant restores the air (C) CO 2 is required for burning of candle (D) Both (a) and (b)

Tardigrade Admin · Accepted Answer

Both options (a) and (b) are correct. Priestley hypothesised that plants restore to the air whatever breathing animal and burning candle removes.

Burning candle removed the air

Mint plant restores the air

CO2​ is required for burning of candle

Both (a) and (b)

Both options (a) and (b) are correct. Priestley hypothesised that plants restore to the air whatever breathing animal and burning candle removes.

$C O_{2}$ is required for burning of candle

Both options (a) and (b) are correct.
Priestley hypothesised that plants restore to the air whatever breathing animal and burning candle removes.