Tag: measurement of properties

Questions Related to measurement of properties

The base unit for the length in metric system 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. cm

  2. m

  3. in

  4. yd

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Correct Option: B
Explanation:

Metre $(m)$ is the basic unit of length in metric system.

$10^{-9}$ cm 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. 1 milli- cm

  2. 1 kilo- cm

  3. 1 centi- cm

  4. 1 micro- cm

  5. 1 nano- m

Show answer
Correct Option: E

SI Unit for 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. Newton

  2. Ounces

  3. Stones

  4. Kilogram

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Correct Option: D
Explanation:

SI unit of mass is Kilogram which is in MKS system.

$10^{-6}$ stands for :

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

  1. milli-

  2. kilo-

  3. centi-

  4. micro-

  5. nano-

Show answer
Correct Option: D
Explanation:

milli- $\displaystyle  10^{-3}$
kilo- $\displaystyle  10^{3}$   
centi- $\displaystyle  10^{-2}$
micro- $\displaystyle  10^{-6}$
nano- $\displaystyle  10^{-9}$

Statement 1: $-273^0C$ is also known as absolute zero.
Statement 2:  $^0C = K + 273 $.

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

  1. Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

  2. Both the Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.

  3. Statement 1 is correct but Statement 2 is not correct.

  4. Statement 1 is not correct but Statement 2 is correct.

  5. Both the Statement 1 and Statement 2 are not correct.

Show answer
Correct Option: C
Explanation:

Absolute zero, temperature at which a thermodynamic system has the lowest energy. It corresponds to $−273^oC$ $ ( 0 K)$.
Celsius scale is 273 greater in value than Kelvin scale.
$^0C = K - 273$

$10^{3}$  stands for :

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

  1. milli-

  2. kilo-

  3. centi-

  4. micro-

  5. nano-

Show answer
Correct Option: B
Explanation:
Name and Factor :

milli- $\displaystyle  10^{-3}$
kilo- $\displaystyle  10^{3}$   
centi- $\displaystyle  10^{-2}$
micro- $\displaystyle  10^{-6}$
nano- $\displaystyle  10^{-9}$

Hence, the correct option is B.

Convert $3,200\mu g$ to grams.

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

  1. $3.2g$

  2. $0.0032g$

  3. $3,200,000g$

  4. $3,200,000,000g$

  5. $0.0000032g$

Show answer
Correct Option: B
Explanation:

Solution:-

As we know that,
$1 \mu g = {10}^{-6} g$
$\therefore \; 3200 \mu g = \left( 3200 \times {10}^{-6} \right) g = 0.0032 g$

Which of the following can be expressed as grams per milliliter?

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

  1. Boiling point

  2. Rate of reaction

  3. Molecular mass

  4. Molarity

  5. Density

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Correct Option: E
Explanation:

Boiling point is expressed in kelvin, molecular mass in kilograms, molarity in moles per litre, rate of reaction in moles per litre per second and density in grams per litre or milliltre.

What is the correct unit for the following solution?

$0.5mg$ of arsenic dissolved in $1kg$ of solution. (All the symbols given are in their standard form)

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

  1. $w/w$

  2. $m$

  3. $M$

  4. $v/v$

  5. $ppm$

Show answer
Correct Option: A
Explanation:

0.5 mg of arsenic dissolved in 1 kg of solution. Both of the solute and solvent are given in terms of mass.

 Therefore, Option a is correct.

1 atm equals 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. 1 torr

  2. 76 torr

  3. 760 torr

  4. 100 torr

Show answer
Correct Option: C
Explanation:
To convert an atmosphere measurement to a torr measurement, multiply the pressure by the conversion ratio. One atmosphere is equal to 760 torr, so use this simple formula to convert:

torr = atmospheres $\times$ 760
The pressure in torr is equal to the atmospheres multiplied by 760.

Hence, the correct option is $C$