Tag: measurement of properties

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Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

$1^{\circ}C$ rise in temperature is equal to rise of:

  1. ${ 1 }^{ 0 }F$
  2. ${ 9/5 }^{ 0 }F$
  3. ${ 5/9 }^{ 0 }F$
  4. ${ 33 }^{ 0 }F$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solution:- (B) $\cfrac{9}{5} ℉$

As we now that,
$F  = \cfrac{9}{5} C + 32$
As the temperature is risen by $1 ℃$-
$C' = C + 1$
Therefore,
$F' = \cfrac{9}{5} \left( C + 1 \right) + 32$
$F' = \cfrac{9}{5}C + \cfrac{9}{5} + 32$
$\Rightarrow F' = \left( \cfrac{9}{5}C + 32 \right) + \cfrac{9}{5}$
$\Rightarrow F' = F + \cfrac{9}{5}$
Hence $1 ℃$ rise in temperature is equal to the rise in $\cfrac{9}{5} ℉$.

Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

If the temperature of a water bath is $104^{0}\ F$ then its value in degree Celsius scale will be?

  1. $35^{0}C$
  2. $45^{0}C$
  3. $50^{0}C$
  4. $40^{0}C$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Conversion from Fahrenheit to Celsius



$(T\ °F − 32) \times \dfrac{5}{9} = t\ °C$

Substituting it, we get,

$(104\ °F − 32) \times \dfrac{5}{9} = 40\ °C$


Hence, the correct option is $D$

Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

Thermometer $(A) & (B)$ have ice points marked at $15^oC & 25^oC$ and steam points at $75^oC & 125^oC$ respectively. When thermometer A measures the temperrature of a bath as $60^oC$ the reading of B for the same bath is :-

  1. $60^oC$
  2. $75^oC$
  3. $90^oC$
  4. $100^oC$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Linear conversion between two temperature scales can be done using the formula (T_A - ice_A) / (steam_A - ice_A) = (T_B - ice_B) / (steam_B - ice_B). Substituting the given values for thermometer A at 60 degrees C gives (60 - 15) / (75 - 15) = (T_B - 25) / (125 - 25), which solves to T_B = 100 degrees.

Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

Weight of a body is:

  1. constant

  2. not constant

  3. does not change from place to place

  4. both A and C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mass of a body is constant whereas weight of a body depends on the acceleration due to gravity at that point. Therefore, weight of body is not constant & varies from place to place.

Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

Electron Volt is a unit of:

  1. Potential difference

  2. Energy

  3. Charge

  4. Velocity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The electron volt (symbol eV; also written electronvolt) is a unit of energy equal to approximately 1.602$\times$10$^{−19}$ joule (SI unit J). 


By definition, it is the amount of energy gained by the charge of a single electron moved across an electric potential difference of one volt.

Hence, the correct option is $B$