Mixture
Mixture: Overview
This Topic covers sub-topics such as Mixtures, Matter, Alloys, Homogeneous Mixture, Pure Substances, Types of Mixtures, Chemical Classification of Matter and, Nature of Alloys
Important Questions on Mixture
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?
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.
Do impure substances have fixed Melting point ,boiling point etc?
What does uniformly distributed means in a homogeneous mixture?
Which of the following pair contains a pure substance and a mixture?
Which of the following pair contains a pure substance and a mixture?
Match the alloys in column A with their constituent elements in Column B.
Column A Column B
1. Invar A Pb, Sn
2. Gunmetal B Pb, Sb, Sn
3. Brass C Cu, Sn, Zn, Pb
4. Solder D Fe, Ni, C
5. Type metal E Cu, Zn
Choose an appropriate match-
The atmosphere mainly consists of nitrogen and oxygen. Which term describes the combination of gases in the atmosphere?
