Tag: matter around us

Quizzes (25) Questions (106)

Questions Related to matter around us

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

Which of the following is not a conversion factor?

  1. 12 eggs = 1 dozen

  2. 30 lbs.

  3. 60 miles per hour

  4. 1 km/1,000 m

  5. 4 apples per week
Reveal answer Fill a bubble to check yourself
C,D,E Correct answer
Explanation

Conversion factor involves same units. For example, length can be converted to length only, time to time only, etc.

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

Name and unit are listed, which is NOT correctly written?

  1. Torr and pressure

  2. Mass and grams

  3. Heat energy and kilopascals

  4. Volume and milliliter

  5. Temperature and Kelvin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Unit of Heat energy is joule ($J$) not kilopascals. kilopascal is unit for pressure.


Hence the correct option is C.

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

298 K is approximately what temperature in degrees Celsius?

  1. $25^oC$
  2. $24^oC$
  3. $29^oC$
  4. $27^oC$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Zero on the Celsius scale $(0^0C)$ is now defined as the equivalent to $273.15K$, with a temperature difference of $1^0C$ equivalent to a difference of $1K$, meaning the unit size in each scale is the same.

$T _k=T _c+273.15$
$T _k=$Temperature in kelvin.

$T _c=$Temperature in celsius.
$T _c=298-273=25^0C$.Option A is correct.

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

Prefix giga means:

  1. $10^{-9}$
  2. $10^{9}$
  3. $10^{6}$
  4. $10^{-6}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The prefix of ${ 10 }^{ -9 }=$ nano

                      ${ 10 }^{ 9 }=$ giga
                      ${ 10 }^{ 6 }=$ mega
                      ${ 10 }^{ -6 }=$ micro
Therefore, $(B)$ is the correct answer.

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

The prefix of $10^{18}$ is:

  1. giga

  2. exa

  3. kilo

  4. nano

  5. mega
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The prefix of ${ 10 }^{ 3 }=$ kilo

                       ${ 10 }^{ 6 }=$ mega
                       ${ 10 }^{ 9 }=$ giga
                       ${ 10 }^{ 18 }=$ exa
Therefore, the prefix of ${ 10 }^{ 18 }$ is exa

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

SI unit of energy is: 

  1. $kg\, m^2 s^{-2}$
  2. $kg\, m^{-1} s^{2}$
  3. $kg\, m^2 s^{-1}$
  4. $kg\, m^2 s^{2}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The power required to do work by the application of force is energy.

Energy has same unit as that of work.
$\therefore$ S.I unit of Energy is $kgm^2 s^{-2}$