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Chemistry MCQs Test Preparation

Chemistry Online MCQs Preparation

1. Swedish chemist J. Berzelius determined:

1.Atomic number
2. Atomic volume
3. Atomic density
4. Atomic mass

2. A limiting reactants is one:

1. Which is present in least amount
2. Does not effect the amount of product
3. Which produces minimum number of moles of product
4. Which produces maximum number of moles of product.

3. The number of subatomic particles in atoms so far discovered is more than:

1. 110
2. 100
3. 125
4. 90

4. Atoms and molecules can either gain or lose electrons, forming charged particles called:

1. Ions
2. Photons
3. Electrons
4. Positrons

5. The branch of chemistry which deals with quantitative relationship between reactants and products in a balanced chemical equation is called:

1. Stoichiometry
2. Analytical
3. Biochemistry
4. Inorganic chemistry

6. The reasons for less experimental yield than theoretical yield are reversible reaction, side reaction and:

1. Maximization
2. Pressure
3. Crystallization
4. Temperature

7. Covalent compounds mostly exist in the form of:

1. Protons
2. Neutrons
3. Molecules
4. Atoms

8. The mass of one mole of iodine:

1. 245 g
2. 74 g
3. 53 g
4. 127 g

9. Determination of atomic masses and invention of system of writing symbols was made by:

1. Dalton
2. Democritus
3. J. Berzelius
4. None of the above

10. An ion having negative charge is called:

1. Photon
2. Cation
3. Anion
4. Electron

11. Metals tends to lose electrons, becoming:

1. Positively charged ions
2. Negatively charged ions
3. All of above
4. Non metals

12. The calculations based on stoichiometry are known as:

1. None of above
2. Simple calculations
3. Stoichiometric calculations
4. Complex calculations

13. Atoms can be evident by the use of electron microscope. field ionization microscope and:

1. x-rays
2. Compound microscope
3. Telescope
4. Video camera

14. Non-metals tend to gain electrons, becoming:

1. Negatively charged ions
2. All of above
3. Metals
4. Positively charged ions

15. First atomic theory was put forward by an English school teacher:

1. Newton
2. John Dalton
3. Maxwell
4. Sanger

16. Gases deviate from ideal behavior because molecules:

1. None of above
2. Attract each other
3. Repel each other
4. Contain covalent bond

17. The basic distinction between solids, liquids and gases lies in difference between:

1. Strength of bonds
2. Space which the molecules occupy
3. All of above
4. Size of molecules

18. Which of the following assumptions is not belonging in kinetic molecular theory of gases?

1. Molecules remove randomly
2 The size of molecules is negligible
3. There is no force attraction between molecules
4. Collisions between molecules is inelastic

19. Which of the following is the simplest form of matter?

1. Solid state
2. Liquid state
3. Gaseous state
4. All of above

20. At same temperature, the kinetic energy of one mole of each H₂ and O₂ separately by:

1. Same
2. None of above
3. Zero
4. Different

21. All gases can be compressed by:

1. Keeping constant pressure
2. None of the above
3. Increasing pressure
4 Decreasing pressure

22. Plasma consists of:

1. Positive ions 2. Mixture of all above
3. Negative electrons 4. Neutral particles

23. The movement of gas molecules from a region of high pressure to vacuum is called:

1. Conduction
2. Diffusion
3. Effusion
4. Evaporation

24. Gases exert pressure on walls of container because the gas molecules:

1. Collide with the walls of container
2. Collide with each other
3. Obey gas laws
4. Have definite volume

25. According to kinetic molecular theory of gases, molecules increase in the kinetic energy when they are:

1. Frozen into a solid
2. Mixed with other molecules at low temperature
3. Melted from a solid to liquid state
4. Condensed into a liquid

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Chemistry MCQs Test Preparation

1. Swedish chemist J. Berzelius determined:

2. A limiting reactants is one:

3. The number of subatomic particles in atoms so far discovered is more than:

4. Atoms and molecules can either gain or lose electrons, forming charged particles called:

5. The branch of chemistry which deals with quantitative relationship between reactants and products in a balanced chemical equation is called:

6. The reasons for less experimental yield than theoretical yield are reversible reaction, side reaction and:

7. Covalent compounds mostly exist in the form of:

8. The mass of one mole of iodine:

9. Determination of atomic masses and invention of system of writing symbols was made by:

10. An ion having negative charge is called:

11. Metals tends to lose electrons, becoming:

12. The calculations based on stoichiometry are known as:

13. Atoms can be evident by the use of electron microscope. field ionization microscope and:

14. Non-metals tend to gain electrons, becoming:

15. First atomic theory was put forward by an English school teacher:

16. Gases deviate from ideal behavior because molecules:

17. The basic distinction between solids, liquids and gases lies in difference between:

18. Which of the following assumptions is not belonging in kinetic molecular theory of gases?

19. Which of the following is the simplest form of matter?

20. At same temperature, the kinetic energy of one mole of each H₂ and O₂ separately by:

21. All gases can be compressed by:

22. Plasma consists of:

23. The movement of gas molecules from a region of high pressure to vacuum is called:

24. Gases exert pressure on walls of container because the gas molecules:

25. According to kinetic molecular theory of gases, molecules increase in the kinetic energy when they are:

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