Which of the following statements below mentioned events that happened in the year 2020 is/are true?
(1) Railways renames Railway Protect ion Force as Indian Railway Public Protection Force Service
(2) RBI launches 'MANI' app to help visually challenged to identify the denomination of notes
The correct answer is D
Brass is made of
The most abundant constituent of atmospheric air is
Spirit in contact with body gives cool sensation because it is:
The mass number of a nucleus is
When a spoon is to be electroplated with nickel the spoon is
The function of skimming tank in sewage treatment is to remove
In addition to hydrogen the other abundant element present on Sunsurface is
Which gas is used for converting vegetable oils into saturated fats?
Which one of the following elements is used in the manufacture of fertilizers?
Conduction band electrons have more mobility than holes because they
