761. In night, when photosynthesis is stopped, plants_____?
✅ C. give off Carbon Dioxide
Everyday Science MCQs – Page 39
762. Cow milk is a rich source of_______?
✅ C. vitamin A
763. The time taken by Sun to revolve around the center of our galaxy is______?
✅ A. 250 million years
764. Which of the following is the most toxic gas?
✅ A. Carbon monoxide
765. What happens to a person who receives the wrong type of blood?
✅ C. The RBCs agglutinate
766. Chemically finger nails are made up of _______?
✅ C. protein
767. The Beta particles are fast moving______?
✅ A. Electrons
768. Central Color of Rainbow is_____?
✅ A. Green
769. When sound waves travel from air to water which of the following quantities remains unchanged?
✅ A. Frequency
770. Radioactivity was discovered by _____?
✅ D. Bacquerel
771. Gulf streams are caused by_____.
✅ A. Ocean Pressure
772. Very High Frequency (VHF) have _____ wavelengths?
✅ B. shorter
773. The strength of wave action depends on all these EXCEPT:
✅ B. Currents in the sea
774. The point within the Earth where earthquakes originate is ____?
✅ D. Focus
775. Which of the following invention is oldest ?
✅ B. Clock
776. Which of the statements to about the Troposphere is not true?
✅ D. It is about 350 km thick
777. Color of the glow produced in the discharge tube:
✅ C. depends on the gas used in the discharge tube
778. What is the temperature at the center of the Sun?
✅ C. 15 million °C
779. The autonomic nervous system innervates all of these except?
✅ A. Skeletal muscles
780. Heating element of an electric heater is made up of______?
✅ D. Nichrome