Chemistry
Give the importance of the following in living beings:
(a) Nitrogen
(b) Hydrogen
(c) Carbon
Answer
(a) Nitrogen — It is the most abundant element present in the atmosphere. It's presence in air reduces the rate of combustion. Due to it's inertness, it is used to preserve food.
(b) Hydrogen — It is the lightest element known and is used in the hydrogenation of vegetable oils to make ghee. As a fuel and in the manufacture of compounds. It is also the essential part of organic compounds.
(c) Carbon — Proteins, fats, carbohydrates, enzymes, vitamins, etc. are all compounds of carbon and are essential for the growth and development of living organisms.
Related Questions
(a) Name the three classes in which elements are classified. Which was the first metal used by man?
(b) Name the metal and non-metal present in abundance in the earth crust.
Name the metal which is a constituent of:
(a) blood pigment
(b) plant pigment
State the position of the following in the periodic table:
(a) Alkali metals
(b) Alkaline earth metals
(c) Halogens
(d) Aluminum
Name:
(a) a liquid non-metal
(b) two metalloids
(c) a metal which do not corrode easily
(d) two metals which react with cold water
(e) a non-metal which can form a positive ion.
(f) a non-metal which shows reducing property.