Tag: mix and separate

Quizzes (5) Questions (127)

Questions Related to mix and separate

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Which type of solution is not filtrable through filter paper and parchment membrane both?

  1. True solution and colloidal sol

  2. Colloidal sol and suspension

  3. True solution and suspension

  4. Suspension only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Filter paper has the pore size of $11 \times 10^{-12}$ m.
Parchment paper Pore size $4.5\times 10^{-13}$ m.
Colloidal solution particle size is $10^-5$ to $10^-2$ m.
True solution particle size is $10^-2$ m.
Suspension solution  Size of particles  usually larger than $10^{-12}$.
So it's cannot pass through Filter paper and Parchment paper both.
Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Mixture of $MgCO _{3}$ & $NaHCO _{3}$ on strong heating gives $CO _{2}$ & $H _{2}O$ in $3 : 1$ mole ratio. The weight $\%$ of $NaHCO _{3}$ present in the mixture is :

  1. $30\%$
  2. $80\%$
  3. $40\%$
  4. $50\%$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Heating MgCO3 gives CO2, and heating NaHCO3 gives CO2 and H2O. Let x be moles of MgCO3 and y be moles of NaHCO3. The total CO2 is x + 0.5y and H2O is 0.5y. Given (x + 0.5y) / (0.5y) = 3/1, we find x = y. Calculating the mass percentage based on molar masses (MgCO3=84, NaHCO3=84) leads to 50%.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

A homogenous mixture of two gases is :

  1. Brass

  2. Graphite

  3. Air

  4. Nitrogen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The air that we breathe is a homogeneous mixture of oxygen, nitrogen, argon, and carbon dioxide, along with other elements in smaller amounts. Because each layer of the Earths atmosphere has a different density, each layer of air is its own homogeneous mixture.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

In construction of a building, which of the following is used?

  1. Water

  2. Cement

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.

Note that a mixture:

  • consists of two or more different elements and/or compounds physically intermingled,
  • can be separated into its components by physical means, and
  • often retains many of the properties of its components.
Cement is a mixture used in construction.