821. Chemically finger nails are made up of ____________?
A. Carbohydrate
B. Fats
C. protein
D. Starch

822. “COTTON” is grown on ___________?
A. Black soil
B. Red Soil
C. Regur Soil
D. Alluvial Sea

823. Very small time intervals are accurately measured by the___________?
A. Pabsars
B. White dwarfs
C. Atomic Clocks
D. None of these

824. Who invented the Hot Air Balloon?
A. Davy
B. Montgolfier
C. Edison
D. Jarvik

825. Which of the following is a ferromagnetic material ?
A. Tungsten
B. Aluminium
C. Copper
D. Nickel

826. What are the primary colors of Light?
A. White, Black, Blue
B. Red, Yellow, Blue
C. Red, Orange, Blue
D. Red, Green, Blue

827. What are the primary colors of Pigment?
A. White, Black, Blue
B. Red, Yellow, Blue
C. Red, Orange, Blue
D. Red, Green, Blue

828. Who first measured the velocity of light?
A. Einstein
B. Newton
C. Ole Roemer
D. Galileo

829. In which part of the Plant does photosynthesis take place?
A. Flowers
B. Roots
C. Stem
D. Leaves

830. Which of the following is affected by rickets in the human body?
A. Bones
B. Tissues
C. Muscles
D. Blood

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