Tag: introduction to solutions

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Multiple choice chemistry element, compound and mixture different types of solutions various mixtures introduction to solutions

A concentrated solution contains high amount of ________.

  1. solvent

  2. solute

  3. both solute and solvent

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A concentrated solution contains the maximum amount of solute that can be dissolved because solubility depends on temperature, a solution that is concentrated at one temperature may not be concentrated at a higher temperature.

Multiple choice chemistry element, compound and mixture different types of solutions various mixtures introduction to solutions

Which of the following is used as antifreeze on cars for cooling the engine?

  1. $10\%$ (V/V) ethanol solution in water
  2. $35\%$ (V/V) ethanol solution in glycol
  3. $45\%$ (V/V) ethanol solution in glycol
  4. $20\%$ (V/V) ethanol solution in water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ethanol-water mixtures are commonly used as antifreeze in cooling systems because they lower the freezing point of the coolant.

Multiple choice chemistry element, compound and mixture different types of solutions various mixtures introduction to solutions

Which of the following are true solutions?

  1. ENO salt in water

  2. Tomato soup

  3. Aam panna

  4. Filtered black tea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A true solution is a homogeneous mixture where the solute particles are completely dissolved and invisible to the naked eye. ENO salt (effervescent salts) dissolved in water creates a true solution, whereas the others are colloids or suspensions.

Multiple choice chemistry is matter pure different types of solutions various mixtures introduction to solutions

If air is taken as a binary solution, the solvent is:

  1. N$ _{ 2 }$
  2. O$ _{ 2 }$
  3. CO$ _{ 2 }$

  4. Ar
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(A) option is correct.

Explanation:
Air is mainly composed of oxygen and nitrogen gas. Around 78% is nitrogen gas and 21% is oxygen. Since the nitrogen content is more than oxygen so nitrogen will be the solvent and oxygen will be the solute if air is considered as binary solution.

Multiple choice chemistry is matter pure different types of solutions various mixtures introduction to solutions

In a glass we are having half filled water. Then we are continuously adding salt to the water and salt is getting dissolved into water. But a state occur when water is not able to dissolve salt. Then the solution is called as 

  1. Unsaturated solution

  2. Saturated solution

  3. Both A and B

  4. Super saturated solution
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A saturated solution is formed due to maximum concentration of a solute dissolved into solvent. The additional solute will not dissolve in a saturated solution.

Multiple choice chemistry introduction to analytical chemistry different types of solutions various mixtures introduction to solutions

What volume would you dilute 0.2 L of a 15 M solution to obtain a 3 M solution?

  1. 1L

  2. 225L

  3. 10L

  4. 0.4L

  5. 0.1L
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
We know that :

$\displaystyle M _1V _1 = M _2V _2 $ 

Given :

$\displaystyle  M _1 = 15 $  M
$\displaystyle V _1 = 0.2 $ L
$\displaystyle  M _2 =3$  M
$\displaystyle  V _2 =$  ????

$\displaystyle  15 \times 0.2 = 3 V _2$
Thus, $\displaystyle  V _2 = 1$  L

Hence, the correct option is A.