Deficiency of Vitamin_D results in __________
(A) night blindness
(B) rickets
(C) scurvy
(D) hair fall
Each day human body breathe in __________ liters of air
(A) 5,000 to 10,000
(B) 10,000 to 15,000
(C) 15,000 to 20,000
(D) 20,000 to 25,000
The most abundant element in the Earth’s crust is __________
(A) Oxygen
(B) Hydrogen
(C) Carbon Dioxide
(D) Silicon
The most abundant element in the universe is __________
(A) Oxygen
(B) Hydrogen
(C) Carbon Dioxide
(D) Silicon
The gas used in a refrigerator to cool water is___________
(A) Nitrogen
(B) Carbon dioxide
(C) Methane
(D) Ammonia
A device which converts chemical energy into electrical energy is called __________
(A) motor
(B) generator
(C) moving-coil meter
(D) battery