Science Quiz Competition 4:

Question 1: The gas cylinders used by deep sea divers for breathing during diving contain a mixture  of two gases. One is oxygen and the other is __________?

Question 2: During the process of galvanization which metal is deposited over iron?

Question 3: The metal which is always kept in kerosene oil is _____________?

Question 4: Except calcium which other element is essential for healthy growth of teeth and bones?

Question 5: What is the structural and functional unit of kidney?

Answer 1: Helium gas

Answer 2: Zinc metal

Answer 3: Sodium metal

Answer 4: Magnesium

Answer 5: Nephron