Which one of the following is the correct relation between Celsius and Fahrenheit temperature scales?
(Symbols carry their usual meanings)

Silver articles turn black when kept in the open for longer time due to the…

Which one of the following oxides shows both acidic and basic behaviour ?

Identify the correct pair of elements among the following which are liquid at room temperature…

Symbol of element was introduced by

A mixture of sodium chloride (salt) and ammonium chloride can be separated by