Tag: matter around us

Questions Related to matter around us

In the metric system, the prefix kilo-means :

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

  1. $10^0$

  2. $10^{-1}$

  3. $10^{-2}$

  4. $10^2$

  5. $10^3$

Show answer
Correct Option: E
Explanation:

In the metric system, the prefix kilo-means $\displaystyle  10^3$. 
For example, 1 kg is equal to $\displaystyle  10^3 g$. 
1 km is equal to $\displaystyle  10^3 $ m.

Temperature of hot red iron is $58^{\circ}$ F. If the temperature increases by $20^{\circ}$ F, what is its temperature now in kelvin?

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

  1. 298.5

  2. 300

  3. 273

  4. $-$80

Show answer
Correct Option: A
Explanation:

Temperature after heating $= 58 + 20 = 78^0F$
Temperature in Kelvin $= (F -  32) \div 1.8 + 273$
                                    $= (78-32) \div 1.8 +273$
                                    $= 46 \div 1.8 + 273$
                                    $= 25.55 + 273$
                                    $= 298.5$ K

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

Show answer
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

Show answer
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

Show answer
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.