Questions

Dust particles such as coal dust(smoke) are fine particle of a solid (carbon in the case of smoke) dispersed in air. They are colloidal systems and the particles are charged either positive or negative. In an applied electrical field, they are attracted towards the opposite electrodes. Movement of the particles towards the electrodes is known as 'electrophoresis'. Hence electrophoresis is applied to remove smoke within the chimeny itself without allowing it to escape into the air and cause nuisance.

The IT ministry launched a desktop software e-Aksharayan in a conference for Indian Languages Technology Industry 'Bhashantara', in New Delhi. The objective is to enable editing and printing of text in scanned documents. The software e-Aksharayan was launched in 7 Indian languages.

National Advisory Council is NOT a constitutional body.

The National Advisory Council (NAC) of India was an advisory body set up by the first United Progressive Alliance (UPA) government to advise the Prime Minister of India.

Washing soda is the common name for Sodium Carbonate (Na2CO3). It is also called as Soda Ash.