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Chemistry Fsc Part 1 Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | What happens to the volue of water when it freeze |
<p>It contracts by 9%</p> <p>It remains the same</p> <p>It expends by 9%</p> <p>It evaporates completely</p> |
| 2 | What happens to the voue of water when it freezes. |
<p>Because F is less electnegative</p> <p>Beacue it is non polar</p> <p>Because hydrogen bonding in HF traps the H+ ion</p> <p>Beacuse HF is a gas</p> |
| 3 | Why can a water molecule formtwo hydrogen bonds on avarage. |
<p>Beacuse it is polar</p> <p>Due to its temperature</p> <p>It has 2 hydrogen atm and 2lone pairs</p> <p>Becuse it has a covalent bond</p> |
| 4 | What else is requrid on the electornegative atom for hydrogen bonding besides bonding to H. |
<p>Resonance</p> <p>Lone pari of electrons</p> <p>Doyble bond</p> <p>Positive charge</p> |
| 5 | Which of the following is essential for hydrogen bond formation. |
<p>Hydrogen bonded to a metal</p> <p>Hydrogen bonded to high electongtive atoms F,O, or N</p> <p>Hydogen boned to non pola ratom </p> <p>Present of pi bond</p> |
| 6 | What types of force is hydrogen bonding. |
<p>Ionic bond</p> <p>A special type of dipole dipole force </p> <p>Metalic Bond</p> <p>London Dispersion force</p> |
| 7 | What cause the polarity in amolecule like CHCl2 |
<p>Equal sharing of electrons</p> <p>Non Polar Bond</p> <p>Uneven distribution of electrons creating positive and negative ceners</p> <p>Absence of hydronge atoms</p> |
| 8 | Which of the following is a polar moleuce taht shows permanent dipole interactions. |
<p>CHCl</p> <p>CH4</p> <p>Cl2</p> <p>H2</p> |
| 9 | Which of the following compounds exhibites permanent dipole permanent dipole intersctions. |
<p>HCl</p> <p>Cl2</p> <p>CH4</p> <p>O2</p> |
| 10 | Which of the folloing has the lowest boiling point among pentane isomers. |
<p>2-2 Dimethylpropane</p> <p>n -Pantane</p> <p>2 Methyle Butane</p> <p>Isohexane</p> |
| 11 | Which hydrocarbon has a higher boiling point due to longer chain length. |
<p>C6H14</p> <p>C2H6</p> <p>C2H8</p> <p>CH3</p> |
| 12 | Which of the folloowing halogens has the highest boiling point. |
<p>I2</p> <p>Cl2</p> <p>F2</p> <p>Br2</p> |
| 13 | The expasnsion of liqudis increae with temperature is |
<p>What happens to the kinetic energy of liquid molecules when cooled.</p> <p>Increases</p> <p>Remain unchanged</p> <p>Decreases, and the liquid may turn into solid</p> <p>Becomes Zero</p> |
| 14 | The expansion of liquids increase with temperatur eis. |
<p>Equa to that of gases</p> <p>Greater than that of gases</p> <p>Negligible copared to gasses</p> <p>Same as solids</p> |
| 15 | According to kinetic molecualr theor liquid molecules are. |
<p>At rest</p> <p>Vibrating in fixed positions</p> <p>In constant random motion </p> <p>Only movng when heated</p> |
| 16 | Liquid are approximately how many times less compressible than gases. |
<p>10</p> <p>105</p> <p>100</p> <p>1000</p> |
| 17 | What causes the lower compressibility of liquids compared to gaes. |
<p>Absence of intermolecular forces</p> <p>Larger mollecular size</p> <p>Stonger intermolecualr fores and less empty space</p> <p>High kinetic energy of molecules</p> |
