A. NO
B. NO2
C. N2O
D. N2O4
Correct Answer:
Option A – NO
Action of dilute (50% of HNO3) will give 8HNO3(l) + 3Cu(s) → 3Cu(NO3)2(aq) + 2NO(g) + 4H2O(l) Whereas
Action of Conc HNO3 will give 4HNO3(l) + Cu(s) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) The copper nitrate salt that forms is a deep blue colour. The nitrogen dioxide is a maroon vapour.
Veterinary medicine is the branch of medicine that deals with the prevention, diagnosis, and treatment…
Anthropology is the scientific study of human beings and their cultures. It encompasses a wide…
Sociology is the scientific study of human society, culture, and behavior. It examines the social…
Social Work is a profession dedicated to helping individuals, families, and communities to cope with…
Religious studies is an academic discipline that explores the beliefs, practices, and history of various…
Public administration is the field of study and practice that focuses on the organization and…