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

Brass is an example of a:

  1. homogeneous compound.

  2. homogeneous mixture.

  3. heterogeneous mixture.

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

Brass is an alloy made up of uniform composition of copper and zinc. It is a homogeneous mixture in which zinc and copper can be varied to create a range of brasses with varying properties.

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

Statement: Dissolved particles of a true solution will settle with gravity.


State whether the given statement is true or false.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Particles of a true solution will settle with gravity. Take an example when mud is dissolved in water and stirred vigorously, particles of mud are distributed evenly in water. After some time, the particles of this solution settle underwater due to the influence of gravity.


Hence, the given statement is $\text{true}$

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

Which of the following mixtures will be the most difficult to separate?

  1. Iron filings + sand

  2. Sand + water

  3. Saw dust + stones

  4. Nitrogen + hydrogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nitrogen (N2) form ammonia (NH3) by a reaction with hydrogen (H2) using a metal catalyst under high temperatures and pressures. It is a chemical combination reaction. Hence the mixture of nitrogen and hydrogen is difficult to separate because a new product is formed.

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

Why alloys are always considered as mixtures?

  1. They have a fixed composition

  2. They shows the properties of its constituents

  3. They can be seperated into its constituents by physical method

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Alloys are homologous mixtures of metals and cannot be separated into its constituents by physical methods. It is still considered a mixture because it shows the property of its constituents and can have variable composition.


Hence, the correct option is $\text{B}$

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

Identify the heterogeneous mixture among the following:


( Brass, common salt and sulphur, water and oil, aerated water, steel )

  1. Common salt and sulphur, Water and oil

  2. Brass, Aerated water, Steel

  3. Common salt and sulphur, Steel, Brass

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A heterogeneous mixture has non-uniform composition. Common salt and sulphur are distinct solid phases, and water and oil do not mix, forming two distinct layers.