Tag: mix and separate

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Questions Related to mix and separate

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

Among the following, name a mixture which is used as a food ?

  1. Milk

  2. Butter

  3. Jelly

  4. All of the above
Reveal answer Fill a bubble to check yourself
D 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.
Milk is a mixture used as food.

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

Of the following substance which is an element, a mixture and a compound? 
Sea water is the example of :

  1. element

  2. mixture

  3. compounds

  4. all of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. Seawater is a complex mixture of 96.5 percent water, 2.5 percent salts, and smaller amounts of other substances, including dissolved inorganic and organic materials, particulates, and a few atmospheric gases. 

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

Which of the following is a homogeneous mixture?

  1. Milk

  2. Steel

  3. Smoke

  4. Soil
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A heterogeneous mixture is composed of components that are not uniform and have different properties. Milk, soil, smoke are the heterogeneous mixture. 


A homogeneous mixture is composed of components that are uniform with fixed composition and proportions e.g. steel is an alloy of iron and carbon with fixed ratios.

Hence, option $B$ is correct.

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

Some examples of matter and their groups are given in column P and Q respectively.

P Q
(a) Air (i) Molecule
(b) $O _2$ (ii) Mixture
(c) Copper sulphate (iii) Base
(d) Sodium hydroxide (iv) Salt

The correct option is :

  1. a - (ii), b - (iv), c - (i), d - {iii)

  2. a - (iv), b - (iii), c - (ii), d - (i)

  3. a - (i), b - (ii), c - (iii), d - (iv)

  4. a - (ii) , b - (i), c - (iv), d - (iii)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(a) Air is a mixture of several gases that are invisible and odorless. It consists of about 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide, and other gases.

(b) Oxygen (O) is a chemical element (atomic number 8). It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element and oxidizing agent that readily forms compounds with most elements. It exists as a $O _2$ molecule in the natural state.
(c) Copper(II) sulfate is a salt and an ionic compound because it is formed from a metal and a non-metal.
(d) Sodium hydroxide is a strong base.
Thus Option D is correct.

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

Stainless steel is a:

  1. homogenous mixture

  2. heterogenous mixture

  3. solid solution of two immiscible solids

  4. pure substance
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stainless steel is a metal alloy made up of steel mixed with elements such as chromium, nickel, molybdenum, silicon, aluminium, and carbon. The content of these elements is not uniform throughout the solid solution which is a necessary condition to be a homogenous mixture. Thus stainless steel is a heterogeneous mixture.


Option (B) is correct.