Q.4 Rocket propulsion technology works on which of the following scientific principles?
Law of coservation of mass
Law of thermodynamics
Newtons laws of motion
Law of reflection of sound
Q.5 Which of the following union territories was a portuguese colony until 1954?
Dadra and Nagar haveli
Punduchery
Andaman and Nicobar islands
Lakshadweep
Q.6 Which of the following scientific principles is mainly behind the generation of hydroelectric power?
Conversion of gravitational potential energy in thermal energy
Conversion of gravitational potential energy in electrical energy
Conversion of gravitational potential energy in kinetic energy
Conversion of gravitational energy in electrical energy