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ECAT Chemistry Chapter 3 Gases Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will : | remain unchanged increase four times reduce to 1/4 be doubled |
| 2 | If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will : | remain unchanged increase four times reduce to 1/4 be doubled |
| 3 | Which of the following will have the same number of
molecules at STP ? |
<p class="MsoNormal">280 CM<sup>3</sup> of CO<sup>2</sup> and 280 CM<sup>3</sup> of N<sub>2</sub>O<o:p></o:p></p> <p class="MsoNormal">11.2 dm3 of O<sub>2</sub> and 32 g of O<sub>2</sub><o:p></o:p></p> <p class="MsoNormal">44 g of CO<sub>2</sub> and 11.2 dm<sup>3</sup> of CO<o:p></o:p></p> <p class="MsoNormal">28 g of N2 and 5.6 dm<sup>3</sup> of oxygen<o:p></o:p></p> |
| 4 | Number of molecules in one dm3 of water is close
to : |
<p class="MsoNormal">6.02/22.4<o:p></o:p></p> <p class="MsoNormal"><br></p> <p class="MsoNormal">12.04/22.4 *10<sup>23 <o:p></o:p></sup></p> <p class="MsoNormal"><br></p> <p class="MsoNormal">18/22.4*10<sup>23</sup></p> <p class="MsoNormal">55.6*6.02*10<sup>23 </sup>* 10<sup>23</sup></p> |
| 5 | Pressure remaining constant, at which temperature volume of gas will become twice of what it is at 0°C ? |
<p class="MsoNormal">546<o:p></o:p></p> 200 546K 273K |
| 6 | At constant temperature when pressure of a gas is plotted against volume, the curve is | Slanting straight line Parabolic Staight line, parallel to pressure axis OF neither type |
| 7 | Keeping the temperature constant, if the gas is expanded | kinetic energy of molecules will increase Number of gas molecules increases Temperature will increases Pressure will decrease |
| 8 | The highest temperature at which a substance can exist as a liquid is called its | Critical temperature Zero temperature Absolute temperature None of above |
| 9 | Absolute temperature of a gas is proportional to | Rotational kinetic energy Translational kinetic energy Vibrational kinetic energy Potential energy |
| 10 | If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be | Remain unchanged Doubled Reduced Increased four times |
| 11 | The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to | Viscosity Molar mass Momentum All of above |
| 12 | The density of a gas is directly and volume at constant temperature for a gas is | Isobaric Isothermal Isotherm None of above |
| 13 | The graph between pressure and volume at constant temperature for a gas is | Isobaric Isothermal Isotherm None of above |
| 14 | The ratio of volume to temperature on Kelvin scale is constant according to | Charle's law Newton's law Coulomb's law Boyle's law |
| 15 | The product of pressure and volume remains constant when temperature and quantity of gas is | zero variable kept constant None of these |
| 16 | A graph between P and PV at constant temperature and number of mole is parallel to | y axis z axis x axis pressure axis |
| 17 | A graph between P and 1/V at constant temperature and number moles of a gas meets the | y-axis x-axis origin none of above |
| 18 | Boyle's law does not fall even | Temperature is extremely high Pressure is extremely high Mixture of gases is taken all of above |
| 19 | According to Boyle's law. which parameters give a straight line parallel to x-axis, when we plot a graph between | V and T P and V P and 1/V P and PV |
| 20 | For a gas obeying Boyle's law if pressure is doubled, the volume becomes | Remains constant Double One half None of above |
| 21 | In Boyle's law which of the following pair is variable | Temperature and quantity of a gas Pressure and Volume Volume and quantity of a gas Pressure and quantity of a gas |
| 22 | In Boyle's law which of the following pair remains constant | Temperature and quality of a gas Pressure and quality of a gas Temperature and pressure Temperature and quantity of a gas |
| 23 | The relationships between volume of a given amount of gas and the prevailing conditions of temperature and pressure are | Charle's Law Graham's Law Boyle's Law Gas Laws |
| 24 | The intramolecular forces in gases are | Weak Normal Very weak Strong |
| 25 | Liquids are less common than | Solids Plasmas Gases All of above |
| 26 | Gases show uniform behaviour towards their | Internal conditions External conditions Internal and external conditions None of above |
| 27 | Cooling happens under the Joule Thomson Effect due to sudden | Contraction Absorption Expansion All of above |
| 28 | In Solids, the temperature is the measure of | Rotational kinetic energies Translational kinetic energies Vibrational kinetic energies None of above |
| 29 | In gases and liquids, temperature is the measure of | Average translational kinetic energies of molecules Average vibrational kinetic energies of molecules Average rotational kinetic energies of molecules None of above |
| 30 | The rate of diffusion of a gas in | Inversely proportional to its density Inversely proportional to square root of its molecular mass Directly proportional to molecular mass Directly proportional to its density |
