Tag: measurement of properties

Questions Related to measurement of properties

The symbol of S.I unit of amount of substance is:

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

  1. mole

  2. density

  3. equivalent weight

  4. molecular weight

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Correct Option: A
Explanation:

Mole is used to represent the amount of a substance. For an element or a compound, mole is given by


$n=\dfrac{Weight\ in\ grams}{Molecular\ Weight}$

Its SI unit is $mole$.

Which one of the following temperatures is approximately equal to "room temperature ?"

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

  1. $0\ K$

  2. $293\ K$

  3. $100$ Degree Celsius

  4. $0$ Degree Celsius

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Correct Option: B

One fermi is?

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

  1. $10^{-15}$ cm

  2. $10^{-13}$ cm

  3. $10^{-10}$ cm

  4. $10^{-12}$ cm

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Correct Option: B
Explanation:

One fermi = $10^{-15}m = 10^{-13}cm$ .

The temperature of absolute zero is _______

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

  1. $273.15^{0}C$

  2.  $0^{0}C$

  3. $-373^{0}C$

  4. $-273.15^{0}C$

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Correct Option: D
Explanation:

The temperature of absolute zero is $T=t+273.15$


Absolute Zero$=T=0$ 


Then $0=t+273.15 ^0C$ 

$t=-273.15 ^oC$

S.I unit for the coefficient of viscosity is equal to?

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

  1. $Nm^{-1}s$

  2. $Pa s^{-1}$

  3. $Nm^{-2} s$

  4. $Pa s^{-2}$

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Correct Option: C

The greatest of the combination is?

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

  1. $(9.0\pm 0.3)$ S.I unit

  2. $(9.0\pm 0.2)$ S.I unit

  3. $(9.0\pm 0.1)$ S.I unit

  4. $(9.0\pm 0.5)$ S.I unit

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Correct Option: D

A volume of ${ 1m }^{ 3 }$ is equal to ?

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

  1. ${ 1000\quad cm }^{ 3 }$

  2. ${ 100\quad cm }^{ 3 }$

  3. ${ 10\quad dm }^{ 3 }$

  4. ${ 10 }^{ 6 }{ cm }^{ 3 }$

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Correct Option: D

SI unit of temperature is ________ .

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

  1. $K$

  2. $^oC$

  3. $^oF$

  4. u

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Correct Option: A
Explanation:

SI unit of temperature is Kelvin because Kelvin was the the first person to suggest using Kelvin in thermodynamic temperature scale. 

One atmosphere is numerically equal to approximately:

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

  1. ${ 10 }^{ 6 }\quad dyne\quad { cm }^{ -2 }$

  2. ${ 10 }^{ 2 }\quad dyne\quad { cm }^{ -2 }$

  3. ${ 10 }^{ 4 }\quad dyne\quad { cm }^{ -2 }$

  4. ${ 10 }^{ 8 }\quad dyne\quad { cm }^{ -2 }$

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Correct Option: A
Explanation:

$P _{dyne/cm^2}=P _{atm}\times 1.01325\times 10^6$


$P _{atm}=1$


then $P _{dyne cm^2}=1.01325\times 10^6$


Option A is Correct.

The S.I. unit of pressure is:

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

  1. pascal

  2. atm

  3. newton

  4. None of the above

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Correct Option: A
Explanation:

The SI unit of pressure is pascal. Newton is the unit of force and atm is not the S.I. unit of pressure.