Online Test | MCQ Atoms and Molecules | NCERT Class 9 Science Chapter 3 | CBSE Syllabus
Every student of class 9 of NCERT/CBSE syllabus may take part this online test of NCERT Class 9 Science Chapter 3 MCQ Atoms and Molecules and verify his score to check preparedness
#1. In an experiment to verify the law of conservation of mass in a chemical reaction, weighing of flask with its content is done carefully
#2. Which of the following contains maximum number of molecule
#3. Which represents 360 g of water - a) 2 moles of H2O, b) 20 moles of H2O, c) 6.022x1023 molecules of H2O, d) 1.2044x1025 molecules of H2O?
#4. The chemical symbol for sodium is
#5. Mass of one atom of oxygen is
#6. The chemical symbol of nitrogen gas
#7. 3.42 g of sucrose (C12H22O11) is dissolved in 18 gram of water in a beaker. The number of oxygen atoms in the solution
#8. Given that- CH4(16 g) + 2O2(64 g) ⇒ CO2(X g) + H2O(36 g). Find the value of X.
#9. The formula unit mass of calcium chloride is
#10. Which of the following would weigh highest
#11. Which statement is correct
#12. Which one of the following represents a correct chemical formula?
#13. The atomic mass of Cl is
#14. Which statement is not true?
#15. Which of the following has maximum no. of atoms
#16. A change in the physical state can be brought about
#17. Which element is used as standard atomic mass scale
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To Be Continued