Tag: nature of matter

Questions Related to nature of matter

Latex is a colloidal solution of rubber particles which are:

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. positively charged

  2. negatively charged

  3. neutral

  4. can be negatively and positively charged.

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Correct Option: B
Explanation:

Latex is a milky fluid produced by certain plants. It consists mainly of a colloidal suspension of rubber globules in a watery liquid. Latex is a colloidal solution of rubber particles which are negatively charged.

Colloidal solutions of metals like gold can be prepared when their salt solutions react with certain substances like $SnCl _{2}$, formaldehyde, phenyl hydrazine, etc.
2$AuCl _{3}$ + 3$SnCl _{2}$ $\rightarrow$ 3$SnCl _{4}$ + $2Au _{sol}$
The above method is an example of:

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. reduction method

  2. oxidation method

  3. hydrolysis method

  4. double decomposition method

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Correct Option: A
Explanation:

  • A colloid is a heterogeneous system in which one substance is dispersed (dispersed phase) as very fine particles in another substance called dispersion medium.
  • Colloidal solutions of metals like gold can be prepared when their salt solutions react with certain substances like $SnCl _2$, formaldehyde, phenylhydrazine.
In the given reaction,
$2AuCl _3 + 3SnCl _2 \rightarrow 3SnCl _4 + 2Au _{sol}$
The oxidation state of $Sn$ is changing from -2 to -4. So,it is gaining electrons and hence the method is the reduction method.

Smoke is an example of ?

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. gas dispersed in liquid.

  2. gas dispersed in solid.

  3. solid dispersed in gas.

  4. solid dispersed in liquid.

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Correct Option: C
Explanation:

Smoke is a collection of small and tiny unburned particles. It actually contains more of fumes and chemicals. The smoke is visible to us in form of ash and carbon. It is kind of solid particle present or dispersed in the gas.

Zig-zag motion of the solute particle in a solution is known as :

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. linear motion

  2. brownian motion

  3. circular motion

  4. curved motion

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Correct Option: B
Explanation:

This is the random motion of particles suspended in a fluid resulting from their collision with the quick atoms or molecules in the gas or liquid. It is named after Robert Brown in 1827.

A homogenous looking heterogenous mixture is called :

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. suspension

  2. colloid

  3. solution

  4. none of the above

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Correct Option: B

Colloids are commonly known as :

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. sol

  2. col

  3. solution

  4. all of the above

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Correct Option: A
Explanation:

Colloids are commonly called sol. In a colloid, particle in the dispersed phase may be 10-1000 times the size of a small molecule.

Colloid is a :

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. homogeneous mixture

  2. non-homogeneous mixture

  3. supersaturated solution

  4. none of the above

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Correct Option: B
Explanation:

Colloid is a heterogeneous mixture. The size of the particles of a colloid is too small to be individually seen by a naked eye.

Particles having size between 1 and 1000 nm dispersed in a medium is called a:

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. colloid

  2. mixture

  3. suspension

  4. none of the above

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Correct Option: A
Explanation:

A homogeneous looking heterogeneous mixture in which particles having a size between 1 and 1000 nm are dispersed in a continuous medium is called a colloid. Colloids are commonly called sols.


Hence. the correct answer is option $A$.

Colloids are classified on the basis of :

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. nature of dispersed phase and dispersion medium

  2. phase of solution

  3. temperature of solution

  4. none of the above

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Correct Option: A
Explanation:

Colloids are classified on the basis of nature of dispersed phase and dispersion medium, like gel, sol, foam, emulsion etc.

The mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance is called _______.

chemistry nature of matter heterogenous mixture - colloidal solution and its properties suspensions and colloids mixtures

  1. colloidal solution

  2. saturated solution

  3. unsaturated solution

  4. none of above

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Correct Option: A
Explanation:

A colloid, in chemistry, is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance.
Examples of colloid are paint, milk, fog etc.