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The clouds consist of charged particles of water dispersed in air.Some of them are +vely charged, others are -vely charged.When +vely charged clouds come closer they cause lightening and thundering whereas when +ve and -ve charged colloids come closer they cause heavy rain by aggregration of minute particles.It is possible to cause artifical rain by throwing electrified sand or silver iodide from an aeroplane and thus coagulating the mist hangind in air. Smoke screens consist ofA. fine particles of `TiO_2` dispersed in air by aeroplanesB. fine particles of Agl dispersed in air by aeroplanesC. fine partilces of `Al_2O_3` dispersed in air by aeroplanesD. None of these

Answer» Correct Answer - A
Smoke screen is cloud of smoke. It consists of fine particles of `TIO_2`


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