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ECAT Chemistry Chapter 3 Gases Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | A graph b/w P and 1/V at constant temperature and number of moles is parallel to : | None of above X-axis Z-axis Y-axis |
| 2 | A graph b/w P and 1/V at constant temperature and number of moles is parallel to : | Y-axis Z-axis X-axis None of above |
| 3 | Boyle's law doesn't fail even : | Temperature is extremely high Pressure is extremely high Mixture of gas is taken All of above |
| 4 | According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between: | V and T P and V P and 1/V P and PV |
| 5 | Boyle's law is represented as : | <p class="MsoNormal">P<b><span style="font-size:18.0pt;mso-bidi-font-size:11.0pt;line-height:107%">∞</span></b> 1/T<o:p></o:p></p> V and 1/P P<b><span style="font-size: 18pt; line-height: 25.68px;">∞</span></b>P P<b><span style="font-size: 18pt; line-height: 25.68px;">∞</span></b>1/P |
| 6 | For a gas obeying Boyle's law if pressure is doubled, the volume becomes : | Remain constant Double One half None of above |
| 7 | 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. |
| 8 | 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. |
| 9 | The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are : | Charles's law Graham's law Boyle's law Gas law |
| 10 | The intramolecular force in gases are : | Weak Normal Very weak Strong |
| 11 | Liquids are less common than : | Solids Plasmas Gases All of above |
| 12 | Gases shows uniform behavior toward their : | Internal conditions External conditions Internal and external conditions None of above |
| 13 | Cooling happens under the Joule Thomson Effect due to sudden : | Contraction Absortption Expansion All of above |
| 14 | In solids, the temperature of is the measure of | Rotational kinetic energies <span style="font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 14.98px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">transnational kinetic</span>energies <span style="font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 14.98px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="font-family: Arial, sans-serif; font-size: 10.5pt; line-height: 14.98px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Vibrational</span>kinetic</span>energies None of the above |
| 15 | In gases and liquids, temperature is the measure of : | Average transnational kinetic energies of molecules. Average vibrational kinetic energies of molecules. Average rotational kinetic energies of molecules. None of above |
| 16 | The rate of diffusion of a gas is : | Inversely proportional to its density Inversely proportional to square root of its molecular mass Directly proportional to molecular mass Directly proportional to its density |
| 17 | Gases of air always remain in random motion and do not settle due to : | Difference in molecular masses of air gases. Difference in partial pressure of gas molecules. Unequal number of different gas molecules. Elastic collision of gas molecules. |
| 18 | Gases exert pressure on walls of container because the gas molecules : | Obey gas laws. Have definite volume. Collide with the walls of container. Collide with each other. |
| 19 | All gases can be compressed by : | Keeping constant pressure Decreasing pressure Increasing pressure None of the above |
| 20 | The movement of molecules from a region of high pressure to vacuum is called : | Evaporation Effusion Conduction Difusion |
| 21 | Which statement about gases is not correct ? | The spread throughout the vessel. Pressure is due to collision There are large spaces between the molecules. molecules are arranged regularly. |
| 22 | Which of the following is the simplest form of matter? |
Gaseous state Liquid state Solid state All of above |
| 23 | A real gas obeying van der Waals' equation will resemble ideal gas if : | both 'a' and 'b' are large both 'a' and 'b' are small 'a' is small and 'b' is large 'a' is large and 'b' is small |
| 24 | The deviation of a gas from ideal behavior is maximum at : | -10<span style="font-size:11.0pt;line-height:107%; font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">°C and 5.0 atm</span> -10<span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°C and 2.0 atm</span> 100<span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°C and 2.0 atm</span> 0<span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°C and 2.0 atm</span> |
| 25 | The deviation of a gas from ideal behavior is maximum at : | -10<span style="font-size:11.0pt;line-height:107%; font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">°C and 5.0 atm</span> -10<span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°C and 2.0 atm</span> 100<span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°C and 2.0 atm</span> 0<span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°C and 2.0 atm</span> |
| 26 | Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ? | At high pressure, the gas molecules move in one direction only. At high pressure, the collisions between the gas molecules are increased manifold. At high pressure, the volume of gas becomes insignificant. At high pressure, the inter molecular attraction become significant. |
| 27 | Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is : | 1/2 8/9 1/9 16/17 |
| 28 | The order of the rate of diffusion of gases NH3,SO2, CL2, and CO2 IS : | NH<sub>3 ></sub>SO<sub>2 ></sub>CL<sub>2 ></sub>CO<sub>2</sub> NH<sub>3 ></sub>CO<sub>2 ></sub><sub></sub>SO<sub>2 ></sub>CL<sub>2</sub> CL<sub>2 ></sub>SO<sub>2 ></sub><sub></sub>CO<sub>2 ></sub>NH<sub>3</sub> NH<sub>3 ></sub>CO<sub>2</sub><sub>></sub>CL<sub>2 ></sub>SO<sub>2</sub> |
| 29 | The molar value of CO2 is maximum at : | STP 127<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="font-size:11.0pt;line-height:107%; font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">°</span>C and 1 atm</span> <span style="line-height: 14.98px; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="line-height: 15.6933px;">0</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°</span><font face="Arial, sans-serif"><span style="font-size: 10.5pt;">C and 2 atm</span></font></span> <span style="line-height: 15.6933px;">273</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; line-height: 15.6933px;">°</span><span style="font-size: 10.5pt;">C and 2 atm</span> |
| 30 | How should condition be changed to prevent the volume of a
given gas from expanding whine its mass is increased ? |
Temperature is lowered and pressure is increased Temperature is increasedand pressure is lowered Temperature and pressure both are lowered Temperature and pressure both are increased |
