General Science - Online Test
Q1. A jet airplane travelling at the speed of 500 kmh–1 ejects its products of combustion at the speed of 1500 km h–1relative to the jet plane. What is the speed of the combustion with respect to an observer on ground?
Answer : Option D
Explaination / Solution:
Speed of the jet airplane, vjet = 500 km/h Relative speed of its products of combustion with respect to the plane, vsmoke = – 1500 km/h
Speed of its products of combustion with respect to the ground = v′smoke
Relative speed of its products of combustion with respect to the airplane, vsmoke = v′smoke – vjet
=> – 1500 = v′smoke – 500
=> v′smoke = – 1000 km/h
The negative sign indicates that the direction of its products of combustion is opposite to the direction of motion of the jet airplane.
Q2. If two soap bubbles of different radii are in communication with each other
Answer : Option A
Explaination / Solution:
No Explaination.
Q3. Which of the following leucocytes transforms into macrophages?
Answer : Option A
Explaination / Solution:
Monocytes are white blood cells or leucocytes that transform into macrophages to engulf the pathogen entering the body.
Q4. Which is the possible region of respiration in bacteria
Answer : Option B
Explaination / Solution:
Bacteria belongs to kingdom Monera in which organism are unicellular and prokaryotic. Prokaryotic organisms lacks membrane bounded organelles like mitochondria where respiration occurs. In bacteria respiration occurs in mesosome.
Q5. Which colour is given by CuSO4 with ammonia?
Answer : Option A
Explaination / Solution:
Q6. Among the following compounds the one that is most reactive towards electrophilic nitration is
Answer : Option A
Explaination / Solution:
Methyl group is electron donating group, hence it increases the electron density in benzene ring thereby increasing the reactivity of the ring towards electrophilic substitution.
Q7. Two services outsourced from India are
Answer : Option A
Explaination / Solution:
Both voice based business process services as well as banking services are being outsourced by companies in developed countries from India.
Q8. Calculate the enthalpy change on freezing of 1.0 mol of water at 10.0 to ice at -10.0. H = 6.03 kJ at 0.1
Answer : Option C
Explaination / Solution:
Q9. A source of demand for foreign exchange is
Answer : Option A
Explaination / Solution:
No Explaination.
Q10.
Find out the mean deviation from median from the following series
Answer : Option B
Explaination / Solution:
No Explaination.
