Tag: chemistry

Questions Related to chemistry

A true solution is a homogeneous mixture of solute and solvent. Chalk powder in water is a heterogeneous mixture. Hence chalk powder is not a true solution.

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

  1. True

  2. False

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Correct Option: A
Explanation:

A true solution has solute completely dissolved in the solvent. In case of chalk powder, it does not completely dissolve in water. Hence chalk powder in water is a heterogeneous mixture & is not a true solution.

Substance that is able to get dissolved in solvent is said to be:

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

  1. solute

  2. insoluble

  3. solvent

  4. soluble

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Correct Option: D
Explanation:

Soluble substances are those that easily dissolve in a solvent, such as water, and include sugar, salt, alcohol and some dish-washing detergents. In chemistry, solubility of a substance is a quantitative term that refers to the amount of substance that can dissolve in a given volume of a solvent.

Any metal mixed with mercury is called an amalgam. The amalgam used for dental filling is__________.

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

  1. Ag - Sn amalgam

  2. Au-Sn amalgam

  3. Au-Ag amalgam

  4. Cu-Au amalgam

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Correct Option: A
Explanation:

Amalgam used for dental filling in Ag - Sn amalgam.

_________is present in a lesser amount in a solution.

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

  1. Solute

  2. Solvent

  3. Solubility

  4. Aqueous solution

  5. Solvation

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Correct Option: A
Explanation:

Option A is the correct answer. 

Because, according to the definition, the substance which is present in lesser amount in a solution is known as solute.

A handful of soil is homogeneous mixture of solids.

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

  1. True

  2. False

  3. Either

  4. Neither

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Correct Option: B
Explanation:

A handful of soil is heterogeneous mixture of solids. It is not uniform in composition. 

Gun powder is a mixture of sulphur and coke.

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

  1. True

  2. False

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Correct Option: B
Explanation:

Gun powder is a mixture of Sulphur, Charcoal and Potassium nitrate.

Sugar solution is a heterogenous mixture.

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

  1. True

  2. False

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Correct Option: B
Explanation:

Sugar solution is a homogeneous mixture because any substance dissolve in water is homogeneous mixture.

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

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

  1. True solution and colloidal sol

  2. Colloidal sol and suspension

  3. True solution and suspension

  4. Suspension only

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Correct Option: D
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.

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 :

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

  1. $30\%$

  2. $80\%$

  3. $40\%$

  4. $50\%$

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Correct Option: D

A solution is a homogenous mixture of a solute in a solvent.

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

  1. True

  2. False

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Correct Option: A
Explanation:

The above statement is true.
A solution is a homogenous mixture of a solute in a solvent.