71. Which of the following gases is known as “Laughing Gas”?
A. Nitrous oxide
B. Nitrogen peroxide
C. Nitrogen
D. Nitric oxide
72. Which of the following is the first man-made plastic that is a bad conductor of heat?
A. Teflon
B. Polythene
C. Bakelite
D. Nylon
73. Which ministry recently launched the ‘National Apprenticeship and Training Scheme (NATS) 2.0 Portal’?
A. Ministry of Urban Development
B. Ministry of Home Affairs
C. Ministry of Education
D. Ministry of Defence
74. Which of the following are called “Key Industrial animals”?
A. Producers
B. Tertiary consumers
C. Primary consumers
D. Decomposers
75. Which of the given is a disease caused by protozoa?
A. Cancer
B. Typhoid
C. Kala-azar
D. Chicken Pox