The NCERT solutions for class 10 science chapter 3 Metals and Non-metals are created by the experts which will help you to clear your concepts and doubts related to the chapter. The NCERT solutions provide answers to all the exercises questions and as well as to the questions mentioned in between the chapter. The solutions provided in this article are based on the CBSE syllabus for class 10 science.
Latest : Trouble with homework? Post your queries of Maths and Science with step-by-step solutions instantly. Ask Mr AL. Generally, metals 10gh solid at room temperature as they have a strong metallic bond that binds them close.
But mercury is a metal which ncert solutions class 10th chemistry chapter 3 result as a liquid metal at room temperature. Metal is generally hard in nature due to its metallic bond between each. But sodium is a metal which is so soft that it can even be cut with a knife. Most of the metals are a good conductor of heat and electricity but silver is considered the best conductor of heat and electricity among them gold and copper are also very good conductors.
Generally, metals are considered a good conductor of heat and electricity. But mercury and lead show slight exception as they are a poor conductors of heat. Explain the meanings of malleable and ductile. Malleable substances are the substance which can be beaten in order to convert them into sheets. Generally, all metals are considered to be malleable in nature.
For example silver, iron. Gold has the highest malleable property hcapter one single gram of gold chemostry be ncert solutions class 10th chemistry chapter 3 result into a sheet of 1 square meter. Ductile substances are substances which can be drawn into wires. All the metals like gold, copper are dectile in nature.
Moreover, the wires for transfer of electricity are made of copper. Why is sodium kept immersed in kerosene oil? 10thh is a very reactive metal. It reacts rapidly with the oxygen and thus cannot be kept in air as it will explode. So it is better to store in a liquid. Further the density of sodium is less than that of water so it will float on the surface.
So water is not a good solvent for the purpose. So sodium is kept in kerosene oil. Iron reacts with steam and forms iron oxide. The reaction is shown below :. Calcium and potassium react desult water to give their respective hydroxides. The reactions are shown below :. The results obtained have been tabulated as follows.
From the table, it can be seen that no metal is able to displace zinc from its solution thus zinc is most rection among given metals. Further, only metal B is able to displace iron from iron sulphate solution. And element A can displace copper. Similarly, element C can displace silver from its solution. Hence B is most reactive. As we have seen part a that element A can displace copper from its solution.
Also, B is more reactive than element A. So element B will also displace copper from copper sulphate solution. Use the table above to answer the following question about metals A, B, C, and D. As stated in ncerg a No metal is able to displace zinc from its solution thus zinc is most rection among given metals. Which gas is produced when dilute hydrochloric acid is added ncert solutions class 10th chemistry chapter 3 result a reactive metal?
Ssolutions the chemical reaction when iron resuult with dilute. In the case when dilute hydrochloric acid is added to a ncert solutions class 10th chemistry chapter 3 result metal we obtain hydrogen gas. The reaction when suphuric acid reacts a reactive ncert solutions class 10th chemistry chapter 3 result hcemistry shown below :.
In this reaction, we obtain iron suphate solution with release of hydrogen gas. What would you observe when zinc is added to a solution of iron II sulphate? Write the chemical reaction that takes place. By reactivity, we know that zinc is more reactive than iron. Thus zinc will displace iron from the iron sulphate solution and form zinc sulphate. The reaction is shown below The ncert solutions class 10th chemistry chapter 3 result dot structure for sodium, oxygen, and magnesium is shown below The formation of Na 2 O and MgO is shown below Why do ionic compounds have high melting points?
The ionic compounds have a very strong electrostatic force of attraction. To overcome these force very high energy is needed.
Thus it is generally seen that the melting point of ionic compounds is quite high. In nature, the elements are present in a combined ncert solutions class 10th chemistry chapter 3 result known as minerals. Minerals may be defined as the solid chemical compound that occurs naturally in pure form.
The chemical Ncert Solutions Class 10th Chemistry Chapter 1 Inc composition of minerals is said to the same. Ores Ncert Solutions Of Class 10th Chemistry Chapter 2 Year are defined as the minerals which can be extracted to make profits. Only economically extractable elements generally metals are considered to be ores. Gangue is the lcass present in the ores such as sand, silt soil. To make the element efficient and more useful, we need to remove the gangue from the ores.
Name two metals which are found in nature in the free state. The metals which are very low reactive elements may be found in free states. Two such metals are so,utions and silver. These metals are so unreactive that they don't form any oxides, peroxides or sulphides. What chemical process is used for ncert solutions class 10th chemistry chapter 3 result a metal from its oxide?
We can obtain metal from its oxide by using the reduction process. The metal oxides are reduced using reducing agents such as highly reactive metals so that they can displace the metal from its oxide. For e. From zinc oxide, we can get zinc by using reducing agent carbon. Metallic oxides of zinc, magnesium, and copper were heated with the following metals. In which cases will you find displacement reactions taking place?
Thus the following result is observed :. Which metals do not corrode easily? The low reactive metals such as gold don't corrode easily whereas highly reactive elements are very easily corroded. This is why these metals chaptef reactive are given gold plating in order to protect them from corrosion.
What are alloys? Alloys are defined as the homogeneous mixture of two or more than two elements. Alloys are prepared to give specific features of all the constituent elements. It is prepared by melting one metal and then diffusing other. For example: steel is an alloy of iron and carbon. Which of the following pairs will give displacement reactions? In all other options, the solution metal is more reactive than the given metal. Which of the following methods is suitable for preventing an iron frying pan from rusting?
It will be most suitable method to prevent it. Paint and grease can also be applied but these are not suitable methods as the pan will be heated and washed again and. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be. The element is Calcium. As calcium oxide is soluble in water and has a high melting point. Food cans are coated with tin and not with zinc.
This is because zinc is more reactive than tin.
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