Tag: chemistry

Questions Related to chemistry

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.

The S.I unit of mass 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. kilogram

  2. gram

  3. decigram

  4. milligram

Show answer
Correct Option: A
Explanation:

The S.I unit of mass is kilogram (kg).


Hence the correct option is A.

Our body temperature is maintained at :

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

  1. ${20 ^ 0C }$

  2. ${41 ^0 C}$

  3. ${37 ^0 C}$

  4. ${11^0 C}$

Show answer
Correct Option: C
Explanation:

Our body temperature is maintained at $37^\circ C$ or $98^\circ F$ on an average. Our body has thermo-regulation mechanism that keeps the body at optimum operating temperature. Water plays an important role in this mechanism.

The SI unit for force 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. Torr

  2. Newton

  3. Joule

  4. Dyne

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Correct Option: B
Explanation:

Force is the product of mass and acceleration

 $\therefore$ Force $=$ Mass $\times$ acceleration
The S.I unit of force is $kg.m/s^2$ or Newton
 $1$ Newton $= 10^5$ Dyne

Option $B$ is the correct answer.

What is the S.I unit of volume?

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

  1. cubic centimeter

  2. cubic meter

  3. cubic foot

  4. cubic millimeter

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Correct Option: B
Explanation:

The S.I unit of volume is cubic meter $(m^3)$.


Hence the correct option is B.

The S.I. 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. kelvin

  2. celsius

  3. fahrenheit

  4. None of the above

Show answer
Correct Option: A
Explanation:

The SI unit of temperature is kelvin.