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Attempt the online quiz which consist of important science questions for NDA and CDS exam. The passing percentage is 70%. This quiz would be helpful for upcoming NDA and CDS exam.
#1. Cutting and peeling of onion bring tears to the eyes because of the presence of
sulfur in the cell
carbon in the cell
fat in the cell
aminoacid in the cell #2. Which of the following is not an enzyme?
Somatotropin #3. During the process of respiration in human beings, the exchange of gases takes place in
bronchi #4. Which among the following is both an endocrine and exocrine gland of human body?
Adrenal #5. Sweating during exercise indicates operation of which one of the following processes in the human body?
#6. Which of the following joints can move in only direction?
Ball and Socket joint
Pivot joint #7. Which plant is commonly known as touch-me-not plant?
Ananas sativus #8. Cannabis plant is the source of
Quinine #9. Which of the following works with calcium to build strong bones
Phosphorus #10. Which one among the following minerals is essential for the transmission of nerve impulses in the nerve fibres of human body?
#11. Which of the following is a water-soluble vitamin and hence is required to be taken everyday?
Vitamin K #12. Which of the following is a rich source of Omega-3 oils?
Cod-liver oil #13. Which of the following metals is a constituent of Vitamin B12?
Zinc #14. Which of the following does not have the capacity to reproduce outside the host cell?
Algae #15. Mycology is the study of
#16. Which type of teeth are used to grind food?
Canines #17. Function of which of the following is to kill germs and help to prevent throat and lung infections?
Tonsils #18. The number of incisors in a human being is #19. Which of the following gases is responsible for discolouration of brass in air?
nitrogen oxide #20. Metals are good conductors of electricity because
atoms in their molecules are loosely packed
they are electrically unstable
they have free electrons
they are ductile
#21. Nichrome is used as heating element because of its
low resistivity and high melting point
high resistivity and low melting point
low resistivity and high melting point
high resistivity and high melting point #22. When a ray of light is going from one medium to another, its
frequency remains same
wavelength remains same
wavelength increases #23. Bats can ascertain distances, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted
supersonic waves from the distant objects
ultrasonic waves from the distant objects
supersonic waves from the bat
ultrasonic waves from the bat #24. Why do some automobiles have additional yellow headlights?
Yellow light does not produce dazzling effect in the eyes of the people coming from front
Yellow light consumes less power
Yellow light is able to penetrate the fog and is thus able to illuminate the road better in fogy nights
both (a) and (b) #25. What type of mirror is used in a view finding mirror of a vehicle?
#26. An optician prescribes a power = - 0.5 dioptre. The corresponding lens must be a
concave lens of focal length 50 cm
convex lens of focal length 50 cm
concave lens of focal length 2 m
convex lens of focal length 2 m #27. In a pressure cooker cooking is faster because the increase in vapour pressure
increases the specific heat
decreases the specific heat
decreases the boiling point
increases the boiling point #28. If a heater coil is cut into two equal parts and only one part is used in the heater, the heat generated will be:
four times #29. In India, distribution of electricity for domestic purpose is done in the form of
220 V; 50 Hz
220 V; 60 Hz
110 V; 60 Hz
110 V; 50 Hz #30. Three resistance coils of 1 Ω, 2 Ω and 3 Ω are connected in series. If the combination is connected to a battery of 9 V, what is the potential drop across the resistance coil of 3 Ω ?