Tissues Class 9 MCQ/Objective questions Science NCERT.
Tissues Question Answer Solution NCERT Class 9 std Science Book Chapter 6
Tissues Activity Solution NCERT Class 9 Std Science Book Chapter 6
The Fundamental Unit of Life MCQ – objective questions.
The Fundamental Unit of Life Solution Class 9 Science. In-text solution and exercise question answer solution.
The Fundamental Unit of Life Activity Solution. Class 9 Science Activity solution.
7. What is the mass of—(a) 1 mole of nitrogen atoms? (b) 4 moles of aluminium atoms (Atomic mass of aluminium= 27)? (c) 10 moles of sodium sulphite (Na2SO3)?
6. Calculation of atomic masses of molecules (a) Ethyne, C2H2(b) Sulphur molecule, S8(c) Phosphorus molecule, P4 (Atomic mass of phosphorus= 31)(d) Hydrochloric acid, HCl(e) Nitric acid, HNO3.
4. Write the chemical formulae of the following. 5. Give the names of the elements present in the following compounds.
Question 3. What are polyatomic ions? Give examples.