Which of the following copper alloys is used for the manufacture of springs and suspension filaments in electrical instruments?
correct answer:-4
Which of the following is true?
correct answer:-3
Which of the following gas/es is/are used to disinfect water in sewage treatment facilities?
correct answer:-4
After discovery of which of the following methods the date of the Harappan Civilization (2300-1750 BC) has been fixed?
correct answer:-4
The Taj Mahal is threatened due to:-
correct answer:-3