Class 9 Atom and Molecules MCQs Online Test

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How to Prepare for the Class 9 Atom and Molecules MCQs Online Test? We have provided the Class 9 science chapter Atom and Molecules Unit online test multiple-choice questions online to help you get better at Atom and Molecules. Experts in the field have produced these Class 9 science chapter Atom and Molecules online test. Students can have a better understanding of complex ideas by using the Atom and Molecules Class 9 Multiple Choice Questions. We’ve taken the effort to offer something special that can make Sound enjoyable. Practice the Sound multiple-choice questions that we have provided on our website with enjoyment.

Access a wide range of MCQs on Atom and Molecules for Class 9 CBSE in our user-friendly online testing platform. Prepare for your Class 9 CBSE exams with our interactive online MCQs test covering Atom and Molecules.

Class 9 Science Atom and Molecules Online Mock Test 1

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Q1. Which of the following correctly represents 360 g of water?
(i) 2 moles of H20
(ii) 20 moles of water
(iii) 6.022 × 1023 molecules of water
(iv) 1.2044×1025 molecules of water

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Q2. Which of the following statements is not true about an atom?

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Q3. The chemical symbol for nitrogen gas is

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Q4. The chemical symbol for sodium is

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Q5. Which of the following would weigh the highest?

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Q6. Which of the following has maximum number of atoms?

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Q7. Which of the following contains maximum number of molecules?

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Q8. Mass of one atom of oxygen is

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Q9. 3.42 g of sucrose are dissolved in 18g of water in a beaker. The number of
oxygen atoms in the solution are

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Q10. A change in the physical state can be brought about

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Q11. Identify the correct symbol of gold:

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Q12. The combining capacity of an element is called:

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Q13. The balancing of chemical equations is in accordance with:

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Q14. If isotopic distribution of C-12 & C-14 is 98 % and 2 % respectively, then the number of C-14 atoms in 12 g of C is:

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Q15. Which is not represented by 1 mole of Nitrogen gas?

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Q16. 18g of water is electrolyzed. The weight of oxygen obtained is:

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Q17. Molecular weight of CuSO4.5H2O is equal to:

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Q18. Out of 1 g of oxygen gas, 1 g of oxygen atoms and 1 g of ozone, maximum number of atoms are present in:

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Q19. The number of atoms present in 0.5 moles of Nitrogen atoms is same as in:

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Q20. Which of the following is not a postulate of Dalton's atomic theory:

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