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Chemistry Fsc Part 1 Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | Which of the following statemetns is true about diffusion in liquids? |
<p>Liquids do not diffuse at all</p> <p>Liqudis diffuse faster than gases</p> <p>Liquids diffuse slower than gases due tos tonger intermolecular forces</p> <p>Liquids diffuse only when heated</p> |
| 2 | What i the rearranged form of the idela gas equation to calculate molar mass of a gas. |
<p>M=PVn/RT</p> <p>M =PV /MRT</p> <p>M = m RT/PV</p> <p>M = RT/PV m</p> |
| 3 | The ideal gas equation is given as. |
<p>PV =nRT</p> <p>PV=RT</p> <p>PV = nRT/V</p> <p>None of these</p> |
| 4 | According to Avodgaro's Law, volume is directly propertional to. |
<p>Pressure </p> <p>Temperature </p> <p>Number of moles</p> <p>Density</p> |
| 5 | Which of the following statemetns about ideal gases is true. |
<p>they have strong intermolecular forces</p> <p>Their particles have significant volume</p> <p>Their volume is mainly due to particle size</p> <p>They have negligible intermolecular forces</p> |
| 6 | Which one of the following effects explains the cooling during the sudden expasion of a gas. |
<p>Boyle's Effect</p> <p>Joule Thomson Effect</p> <p>Charles Effect</p> <p>Avogadr's law</p> |
| 7 | Liquid crystals exhibit properties. |
<p>Only like solids</p> <p>Only like liquid</p> <p>Between solids and liquids</p> <p>Unliek solids or liquids</p> |
| 8 | Which type of intermolecular force is present in all types of moleclues regardless of their polarity. |
<p>Dipole -dipole forces</p> <p>London dispersion forces</p> <p>Hydrogen bonds</p> <p>Ion dipole forces</p> |
| 9 | Which of the following is a characteristic property of crystalling solids. |
<p>they have a range of melting points </p> <p>They are isotrople</p> <p>they have adefinite and sharp melting point</p> <p>They lack a regular arrangeness of particles</p> |
| 10 | Why can gases be compressed easily. |
<p>Because they have strong intermolecular forces</p> <p>Becasue their particles are lightly packed</p> <p>Because most of their volume is empty space</p> <p>Beacuse they are denser than solids</p> |
| 11 | Which state of matter exists only within a narrow range of temperature and presssure. |
<p>Liquid</p> <p>Solid</p> <p>Gas</p> <p>Plasma</p> |
| 12 | Surface tensin of liquid is due to. |
<p>Inword pull of surface molecule</p> <p>Upard pull from the surface</p> <p>Collision of molecules</p> <p>Repulsive forces</p> |
| 13 | When water freezes at 0 oC its density decrease due to. |
<p>Cubic structur eof ice</p> <p>Empty spces present in the structure of ice</p> <p>Derease in volume</p> <p>Decrease in viscosity</p> |
| 14 | When the vapour pressure of a liquid equals the external pressure, what phenomenon occurs. |
<p>Sublimation</p> <p>Bioling</p> <p>Freezing</p> <p>condensation</p> |
| 15 | London dispersion forces are teh only forces present among. |
<p>Molecules of water in liquid state</p> <p>Atoms of helium in gaseous stat at high temperature</p> <p>Molecuels of solid iodine</p> <p>Molecules of hydrogen chloride gas</p> |
| 16 | If 16 g of O2 react with excess C2H6,how many gamof CO2 will be formed. 2C2H6+7O2-----------------4CO2 +5H2O |
<p>22 g</p> <p>13 g</p> <p>9 g</p> <p>7g</p> |
| 17 | A mixture of 8 g of H2 with 8 g of O2 is ignited 2H2 +O2----------------2H2O What is the mass of water formed. |
<p>9 g</p> <p>36 g</p> <p>16 g</p> <p>72 g</p> |
