Questions

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

Act 338 enjoins this. Appointed in November 1950, this official has now been redesignated Commissioner for Scheduled Castes and Tribes. He submits annual reports to the president.

A transformer that increases voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a Step-Up Transformer.

Conversely, a transformer designed to do just the opposite is called a Step-Down Transformer. 

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.