Tag: homogenous and heterogenous mixtures

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Questions Related to homogenous and heterogenous mixtures

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.

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

 Which one is true solution :

  1. sugar sol

  2. Blood

  3. starch

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

True Solution is a homogeneous mixture of two or more substances in which substance dissolved (solute) in solvent has the particle size of less than 10-9 m or 1 nm. Simple solution of sugar in water is an example of true solution. Particles of true solution cannot be filtered through filter paper and are not visible to naked eye.
Colloidal Solution is a heterogeneous mixture in which particle size of substance is intermediate of true solution and suspension i.e. between 1-1000 nm. Smoke from a fire is example of colloidal system in which tiny particles of solid float in air. Just like true solutions, Colloidal particles are small enough and cannot be seen through naked eye.They easily pass through filter paper. But colloidal particles are big enough to be blocked by parchment paper or animal membrane.
blood, starch, ink : Colloidal Soln.
sugar sol., salt sol : true soln.

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

Particles of true solution are visible to naked eye.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Property True Solution Colloidal Solutions Suspension
Size of the particles < 1nm 1 1000nm >1000nm
Nature Homogeneous Heterogeneous Heterogeneous
Filterability Diffusion through parchment paper Particles of true Solution diffuse rapidly through filter paper as well as parchment paper. Colloidal particles pass through filter paper but not through parchment paper. Suspension particles do not pass through filter paper and parchment paper.
Visibility Particles of True Solution are not visible to naked eye. Colloidal particles are not seen to naked eye but can be studied through ultra microscope. Suspension particles are big enough to be seen by naked eye.
Tyndall effect True Solution does not show Tyndall effect. Colloids shows Tyndall effect. Suspension may or may not show Tyndall effect.
Appearance Transparent Translucent Opaque