What is meant by uniqueness of protoplasm among all the forms of life present on earth ?

What is meant by half life of a radioactive element?

What are the oxide form of nitrogen present in the atmosphere ?

What is the distinctive feature of mandible among all the skull bones?

What is meant by Chemosynthetic theory of origin of life ?

What is the structural unit present in all allotropic forms of boron ?

What is meant by the statement that the half-life of radium is 1622 years ?

Why CaF_2 is considered the most important.fluoride salt among all the fluoride salts of alkaline earth metals?

What is the formula of the crystalline compound in which the atoms A are present at all the eight corners and atoms B at the centres of all the six faces ?

Express the following statements in the form of two simultaneous linear equations in two variables and determine whether these equations are solvable or not by the method of finding the relations among the ratios of the co-efficients of the same variables and the constant terms : The sum of the present ages of your elder sister and your father is 84 years. After 8 years, your father's age will be 2""1/3 times of your elder sister.

What is meant by specific gas constant? Is the value of this constant same for all gases?