Mixture
Mixture: Overview
This topic covers concepts such as, Mixtures, Homogeneous Mixture, Air as a Homogenous Mixture etc.
Important Questions on Mixture
Brass contains-
A solid mixture contains sand, camphor, sulphur, potassium nitrate and sodium chloride. How will you separate each constituent from the mixture?
Explain the process of separation of different constituents in coloured ink.
Which of the following is not a solution?
Gunpowder is a
Which among the following is not a homogeneous mixture?
Give an example each for solid-liquid and solid-solid types of a homogeneous mixture.
Identify the element from the following.
What is the difference between an alloy and a metalloid?
Pure gold is very soft and therefore not suitable for making jewellery. To make it hard, gold is alloyed with other metals. The purity of gold is measured in carats according to the table below. Carat number is the number of parts of gold in parts.
| Carat number | Number of parts of gold in parts |
Number of parts of other metals in parts |
(a) What is the percentage of gold in carat gold? Name any two metals that are used to make carat gold.
b) (i) What type of mixture is an alloy?
(ii) How does the electrical conductivity of an alloy compare with that of the pure metal?
Pure gold is very soft and therefore not suitable for making jewellery. To make it hard, gold is alloyed with other metals. The purity of gold is measured in carats according to the table below. Carat number is the number of parts of gold in parts.
| Carat number | Number of parts of gold in parts |
Number of parts of other metals in parts |
(a) What is the percentage of gold in carat gold? Name any two metals that are used to make carat gold.
(b) Like gold, pure iron is also comparatively soft and also undergoes rusting. Name the substance that is mixed with iron.
(i) to make it hard
(ii) to change it to stainless steel to prevent rusting.
Give reason:
A mixture of two solids is generally heterogeneous while a mixture of any number of gases is homogeneous in nature.
Do impure substances have fixed Melting point ,boiling point etc?
What does homogeneous mean?
Which of these is a mixture?
What does uniformly distributed means in a homogeneous mixture?
Define homogeneous mixture.
Vinegar is an example of heterogeneous mixture.
Two types of mixtures are homogeneous and _____.
Classify the type of mixtures.
