MCQOPTIONS
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MCQOPTIONS
This section includes 32 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the relative rate of effusion of CO and CO2? |
| A. | CO is 1.25 times faster than CO2 |
| B. | CO is 3.75 times faster than CO2 |
| C. | CO is 1.25 times faster than CO |
| D. | Both diffuse at the same rate |
| Answer» B. CO is 3.75 times faster than CO2 | |
| 2. |
Which of these gases diffuse more quickly than oxygen? |
| A. | H2S |
| B. | NO |
| C. | Cl2 |
| D. | N2O |
| Answer» C. Cl2 | |
| 3. |
Which of the following is not considered as an intermolecular force between molecules? |
| A. | Coordinate covalent bonds |
| B. | Hydrogen bonds |
| C. | Debye forces |
| D. | London dispersion forces |
| Answer» B. Hydrogen bonds | |
| 4. |
The weakest (in strength) of the following intermolecular forces is |
| A. | Hydrogen bonding |
| B. | Vander Waals force |
| C. | Forces among the polar molecules |
| D. | Ionic bond |
| Answer» C. Forces among the polar molecules | |
| 5. |
Ideal gasses have all the following characteristics except. |
| A. | Absence of intermolecular forces |
| B. | Collisions among the molecules of an ideal gas are perfectly elastic |
| C. | The molecules occupy no space |
| D. | All of the above are correct |
| Answer» D. All of the above are correct | |
| 6. |
Which of the following statements is true about plasma |
| A. | It may be the first state of matter |
| B. | It is not a phase transition |
| C. | It is a conductor of electricity |
| D. | All of the above |
| Answer» E. | |
| 7. |
Under what conditions the gases deviate from the ideal behavior? |
| A. | High temperature |
| B. | Low temperature |
| C. | High pressure |
| D. | B and c |
| Answer» E. | |
| 8. |
The introduction of Kelvin scale in thermometry is according to |
| A. | Boyles law |
| B. | Charles law |
| C. | Daltons law |
| D. | Grahams law |
| Answer» C. Daltons law | |
| 9. |
The diffusion of gases at absolute zero will be |
| A. | Unchanged |
| B. | Slightly decreased |
| C. | Slightly increased |
| D. | Zero |
| Answer» E. | |
| 10. |
Which of the following option is incorrect about gases? |
| A. | All molecules move with same speed |
| B. | All molecules behave independently |
| C. | PV / RT = n |
| D. | All gases cannot be liquefied through Linds Method |
| Answer» B. All molecules behave independently | |
| 11. |
Critical temperature for different gases is different and depends upon |
| A. | Size of molecule |
| B. | Shape of molecule |
| C. | Intermolecular attractions |
| D. | All of the above |
| Answer» E. | |
| 12. |
Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be |
| A. | 16 gmol-1 |
| B. | 32 gmol-1 |
| C. | 48 gmol-1 |
| D. | 64 gmol-1 |
| Answer» C. 48 gmol-1 | |
| 13. |
What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume? |
| A. | 98.5 atm |
| B. | 96.7 atm |
| C. | 95.8 atm |
| D. | 97.1 atm |
| Answer» B. 96.7 atm | |
| 14. |
The processes of effusion and diffusion are best understand by |
| A. | Daltons law |
| B. | Avogadros law |
| C. | Grahams law |
| D. | Charles law |
| Answer» D. Charles law | |
| 15. |
Who made volume and pressure correction to explain deviation of gases from ideal behaviour? |
| A. | Clausius |
| B. | Boltzman |
| C. | Charles |
| D. | Vander waal |
| Answer» E. | |
| 16. |
The non-ideal behaviour results chiefly from |
| A. | Intermolecular attraction and infinite volume |
| B. | Elastic collisions and finite volume |
| C. | Intermolecular attractions and finite volume |
| D. | Intermolecular attraction only |
| Answer» D. Intermolecular attraction only | |
| 17. |
The gases become non-ideal at |
| A. | High temperature and high pressure |
| B. | Low temperature and low pressure |
| C. | High temperature and low pressure |
| D. | Low temperature and high pressure |
| Answer» E. | |
| 18. |
In how many forms do matter exists? |
| A. | Three |
| B. | Four |
| C. | Five |
| D. | Two |
| Answer» C. Five | |
| 19. |
What is the abundant form of matter on earth? |
| A. | Gas |
| B. | Liquid |
| C. | Solid |
| D. | Plasma |
| Answer» D. Plasma | |
| 20. |
Which state of matter has the lowest density? |
| A. | Gas |
| B. | Liquid |
| C. | Solid |
| D. | Plasma |
| Answer» B. Liquid | |
| 21. |
What do we call to sudden expansion of plasma? |
| A. | Avogadros law |
| B. | Grahams law of diffusion |
| C. | Joule Thompson effect |
| D. | Daltons law of partial pressure |
| Answer» D. Daltons law of partial pressure | |
| 22. |
The solid particles only posses |
| A. | Translational motion |
| B. | Vibrational motion |
| C. | Rotational motion |
| D. | All of above motions |
| Answer» C. Rotational motion | |
| 23. |
For a gas where volume and pressures are 1dm3 and 2 atm respectively what should be its new volume when pressure is increased to 6 atm at constant temperature? |
| A. | 1/2dm3 |
| B. | 1/3dm3 |
| C. | 1/4dm3 |
| D. | 2/3dm3 |
| Answer» C. 1/4dm3 | |
| 24. |
If 1/V is plotted on X-axis and pressure on Y-axis at constant temperature what should appear |
| A. | Straight line parallel to x-axis |
| B. | Straight line parallel to y-axis |
| C. | Straight line |
| D. | Curve |
| Answer» D. Curve | |
| 25. |
Which one is the right value for R? |
| A. | 0.0821 atm dm3k-1mol- |
| B. | 0.0821 atm m3k-1mol-1 |
| C. | 2 cal k-1 mol-1 |
| D. | 8.314 Nm2k-1mol-1 |
| Answer» B. 0.0821 atm m3k-1mol-1 | |
| 26. |
One mole of an ideal gas at 546.5 K under 2 atm pressure has a volume of |
| A. | 22.414 m3 |
| B. | 44.828 dm3 |
| C. | 22.414 dm3 |
| D. | 11.212 cm3 |
| Answer» D. 11.212 cm3 | |
| 27. |
The partial pressure exerted by the water vapours is called |
| A. | Surface tension |
| B. | Aqueous tension |
| C. | Vapour pressure |
| D. | Hydraulic pressure |
| Answer» C. Vapour pressure | |
| 28. |
Which one is not the partial pressure of oxygen in the lungs? |
| A. | 0.1526 atm |
| B. | 116 mm of Hg |
| C. | 116 torr |
| D. | 1 atm |
| Answer» E. | |
| 29. |
The spreading of fragrance or scent in air is due to |
| A. | Diffusion |
| B. | Effusion |
| C. | Attraction with air |
| D. | Low dsensity |
| Answer» B. Effusion | |
| 30. |
The kinetic molecular theory of gases was put forward in 1738 by |
| A. | Boltzman |
| B. | Maxell |
| C. | Clausius |
| D. | Bernoulli |
| Answer» E. | |
| 31. |
The highest temperature at which a substance can exist as a liquid is called its |
| A. | Critical temperature |
| B. | Standard temperature |
| C. | Absolute temperature |
| D. | Upper consulate temperature |
| Answer» B. Standard temperature | |
| 32. |
Linds method is employed for |
| A. | Separation of gases |
| B. | Expansion of gases |
| C. | Compression of gases |
| D. | Liquefaction of gases |
| Answer» E. | |