A given amount of gas occupies 10.0dm\(^3\) at 4 atm and 273°C. The number of moles of the gas present is?

[Molar volume of gas at s.t.p = 22.4 dm\(^3\)]

According to Charles' law, the volume of a gas becomes zero at

A substance that is used as a ripening agent for fruits is

The Sulphide which is insoluble in dilute hydrochloric acid is

What is the PH of 0.00 1 moldm\(^3\) solution of the sodium hydroxide