Ch-1 Basic Concepts Leave a Comment / By abdulslambsn@gmail.com / October 4, 2025 Welcome To Your Quiz "Ch-1 Basic Concepts" Click on "Start Quiz" To Continue... 1. The smallest particle which can take part in a chemical reaction ? Ion Molecule Neutron Atom None 2. Which of the following is a molecule ? H He Na K None 3. Haemoglobin is made up of how many molecules ? 9000 10,000 12.000 15,000 None 4. The soul chemistry is its dealing with ? Internal Structure Compsition Properties of Matter Composition & Properties of Matter None 5. If an atom loses three electron such as "Al" how many positive charge will it gain ? 1 2 3 4 None 6. Empirical formula or formula unit of a compound ? May Be Similar or Different Always Same Always Different None None 7. The mass of One Mole of Water is ? 8 g 12 g 16 g 18 g None 8. Which of the following is a substance ? Sea Water Brass Tap Water Graphite None 9. Electrometer is also called ? Voltmeter Ion Collector Ampere Meter Galvanometer None 10. The volume occupied by 1.4 g of N2 at S.T.P is ? 2.24 dm^3 22.4 dm^3 1.12 dm^3 112 dm^3 None 11. Percentage of oxygen in water is ? 80% 88.89% 8.8% 9.8% None 12. Molecular mass of CaCO3 is ? 100 120 130 140 None 13. Carbon has Isotopes ? 1 2 3 4 None 14. Tin has Isotopes ? 7 9 11 12 None 15. Simplest formula that gives the small whole number ratio between the atoms of different elements ? Mole Number Molecular Formula Empirical Formula Ionic Formula None 16. Molecular Formula = n x moles n x empirical formula n x mass None None 17. Isotopes are sister atoms of same element with similar chemical properties but different ? Atomic Number Atomic Weight Atomic Mass Atomic Volume None 18. Atoms of which one of the following element have independent existence ? F Cl Kr N None 19. Which of the following element can exist in monoatomic form ? Oxygen Nitrogen Chlorine Helium None 20. Moles = Mass/Molar Mass Mass Molar Mass None None 21. One of the substances is used to absorb CO2 gas in combustion analysis which is that substancе ? 50% KOH Al2O3 Mg(CIO4)2 SiO2 None 22. Avogadro's Number = ? 6.02 x 10^23 6.02 x 10^22 6.002 x 10^23 6 x 10^23 None 23. In Mass-Mass relationship we can find the mass of a 1 substance with the help of ______ other substance ? Mass Volume Molar Mass None None 24. The mass of one mole of electrons is ? 1.008 mg 0.55 mg 0.055 mg 1.0 mg None 25. 27g of Al will react completely with how much mass of O2 to produce AL2O3 ? 30 g of O 25 g of O 32 g of O 24 g of O None 26. The largest number of molecules are present in ? 3.6 g of H2O 4.8 g of C2H5OH 2.8 g of CO None None 1 out of 6 Thanks For Taking This Quiz - Please See Your Answers/Results Below After Entering Your Name & Email... Name Email Time's up
