Class 10th Science Chapter 3 Ncert Solutions Uk
We have included all the important questions from Ncertt and Non Metals similar to Uk Class 10th Solutions Chapter Science Ncert 3 that of your chapter 3 science Class 10 notes to help you 10gh a good score in Class 10 science exam. Question 1 Give an example of a metal which : i is Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk a liquid at room temperature. Answer: i Mercury ii Sodium iii Silver iv Lead.
Question class 10th science chapter 3 ncert solutions uk Explain the meanings of malleable and ductile. Answer: Malleable : A metal that can be beaten into thin sheets on sciemce is called malleable.
Ductile : Class Ncert 3 Solutions Science Uk Chapter 10th A metal which can be drawn into thin wires is called ductile. Question 1 Why is sodium kept immersed in kerosene oil? Answer: Sodium is highly reactive. So it is kept immersed in solutins oil to prevent chpter reaction with oxygen, moisture and carbon dioxide of air to prevent accidental fires.
Question 2 Write equations for the reactions of i iron with steam. Question Class 10th Science Chapter 3 Ncert Solutions Uk 3 Samples class 10th science chapter 3 ncert solutions uk four metals A, B, C and D were taken and added to the following solution one by one.
The results obtained Class 10th Science Chapter 3 Ncert Solutions Uk have been tabulated as follows :. Answer: i B is the most reactive metal because it gives Class 10th Science Chapter 3 Ncert Solutions Uk displacement reaction with iron II sulphate. Metal A is less reactive because it displaces copper vhapter its salt class 10th science chapter 3 ncert solutions uk. Metal C is still less reactive because it can displace only silver from its salt solution and metal D is the least reactive because it cannot displace any metal from its salt solution.
Question scuence Which gas is produced when dilute hydrochloric acid is added to a reactive solutionns Write the sciene reaction when iron reacts with dilute Sckence 2 Sollutions 4.
Answer: Hydrogen gas is produced when dilute hydrochloric acid is added to a reactive metal. Question 5 What would you observe when zinc is added to a solution of iron II sulphate? Write the chemical reaction that takes place. Answer: Zinc is more reactive than iron.
Therefore, when zinc is added to a 10th Uk Ncert Science Chapter 3 Class Solutions Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk solution of iron II sulphate, then the greenish colour of iron II sulphate solution fades Class 10th Science Chapter 3 Ncert Solutions Uk gradually due to the formation of colourless zinc sulphate solution and iron class 10th science chapter 3 ncert solutions uk is deposited on zinc.
Question 1 i Write the electron dot structures for sodium, oxygen and magnesium. Question 2 Why do ionic compounds have high melting points? Answer: The ionic compounds are made up of positive and negative ions. There is a strong force Class 10th Science Chapter 3 Ncert Solutions Uk of attraction between the oppositely charged ions, so a lot of heat energy is required Class 10th Science Chapter 3 Ncert Solutions Uk to break this force of attraction and melt the ionic compound.
Class 10th science chapter 3 Class 10th Science Chapter 3 Ncert Solutions Uk ncert solutions uk to this, ionic compounds have high melting points. Chapger 1 Define 10gh following Class 10th Science Chapter 3 Ncert Solutions Uk terms : i Mineral, ii Ore and iii Gangue. Answer: i Mineral : The natural materials in which the metals or their compounds are found in earth are called minerals. Question 3 What chemical process is used for obtaining a ncerf from its oxide.
Answer: Reduction process is used for obtaining a metal from its oxide. For example, zinc oxide is reduced to metallic zinc by heating with carbon. Besides carbon, highly reactive metals like sodium, calcium, clss. These displace metals Class 10th Science Chapter 3 Ncert Solutions Uk of low reactivity from their oxides.
Question 1 Metallic oxides of zinc, magnesium and copper were heated with the following metals :. In which cases will you find displacement reactions taking place?Class 10th Science Chapter 3 Ncert Solutions Uk
Answer: A more reactive metal can displace a less reactive metal from its oxide. But out Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk of zinc, magnesium, and copper metals, magnesium is the most reactive, zinc is less reactive whereas copper is the least reactive metal.
Question 3 What are alloys? Answer: An alloy is chspter Class 10th Science Chapter 3 Ncert Solutions Uk homogeneous mixture of two or more metals, or a metal and a non-metal. For example, Class 10th Science Chapter 3 Ncert Solutions Uk bronze is an alloy of copper and tin. Metals and Nonmetals Class 10 Question 1. Which Class 10th Science Chapter 3 Ncert Solutions Uk of the following pairs will give displacement reactions? Answer: d AgNO 3 solution and xcience metal. Question Class 10th Science Chapter 3 Ncert Solutions Uk 2. Which of the following methods is suitable for preventing an iron frying pan from Class 10th Science Chapter 3 Ncert Solutions Uk rusting?
Answer: c Applying a coating of zinc. Question 3. An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in class 10th science chapter 3 ncert solutions uk. The element is likely to be a calcium b carbon c silicon d iron Answer: 1t0h Calcium.
Question 4. Food cans are coated with tin and not with zinc because a zinc is costlier than tin b sllutions has a higher melting point than tin c zinc is less reactive than tin d zinc is soljtions Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk reactive than tin.
Answer: d Zinc is more reactive than tin. Metals and Non kk Class 10 Question 5. You are given class 10th science chapter 3 ncert solutions uk hammer, a battery, a bulb, wires and a switch.
Answer: a Metals can be beaten into thin sheets with a hammer without breaking. Non-metals cannot be beaten with a hammer to form thin Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk sheets.
Non-metals break into pieces when hammered. Metals are malleable, while non-metals are non-melleable. When metals are connected into circuit using a battery, bulb, wires and switch, current passes through the circuit and the bulb glows.
When non-metals like sulphur are connected, the bulb does not light up at all. Metals are good conductors of electricity. Metals are good conductors of electricity so these can be used for electrical cables.
Question 6. What are amphoteric oxides? Give two examples of amphoteric oxides? OR Write chemical equations that show aluminium oxide reacts with acid as Class 10th Science Chapter 3 Ncert Solutions Uk well as solutios. In other words, metal oxides that react wtih both acids and bases to Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk form salt and water are called amphoteric oxides. Aluminium oxide and zinc oxide are amphoteric in Class 10th Science Chapter 3 Ncert Solutions Uk nature. Question 7. Name two metals which will displace hydrogen from dilute acids and two metals which will not.
Answer: i Metals above hydrogen in the activity series like sodium and Class 10th Science Chapter Ncert Solutions For Class 10th Science Chapter 3 Gre 3 Ncert Solutions Uk magnesium displace hydrogen from dilute acids. Question 8. In the electrolytic refining of a metal Chappter, what would you take as the anode, the cathode and the electrolyte? Question Class 10th Science Chapter 3 Ncert Solutions Ag 9. Pratyush took sulphur powder on a spatula and heated it.
He collected the gas evolved by inverting a Class 10th Science Chapter 3 Ncert Solutions Uk test tube over it, as shown in the figure. Answer: i Dry litmus paper � no action.
Question State two ways to ecience the rusting of iron. Answer: Ways to prevent rusting of iron are : a By painting b By galvanizing. What type of oxides are formed Class 10th Science Chapter 3 Ncert Solutions Uk when non-metals combine with oxygen? Answer: Non-metals combine with oxygen to form acidic oxides or neutral oxides. Give reasons : a Platinum, gold and silver are used to make jewellery.
Answer: a Platinum, gold and silver are used to make jewellery because these are malleable and ductile. These Class 10th Science Chapter 3 Ncert Solutions Uk are highly resistant to corrosion. This is class 10th science chapter 3 ncert solutions uk to their low ignition temperature and high reactivity.
This layer prevents aluminium to react with other substances. Since it is easier to obtain metals from their oxides than from their carbonates or sulphides Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk directly, therefore, the carbonate and sulphide ores are first converted to oxides for extracting the metals.Class 10th Science Chapter 3 Ncert Solutions Uk
You must have seen tarnished copper vessels cnert cleaned with lemon or tamarind juice. Explain Class 10th Science Chapter 3 Ncert Solutions Uk Class 10th Science Chapter 3 Ncert Solutions Uk why these sour substances are effective in cleaning the vessels. Answer: The sour substances such as lemon or tamarind juice contain acids.
These acids dissolve the coating of copper oxide or basic Class 10th Science Chapter 3 Ncert Solutions Uk copper carbonate present on the surface of tarnished copper vessels and makes them shining red-brown. Differentiate between chapher and non-metal on the basis of their chemical properties. A man went door-to Class 10th Science Chapter 3 Ncert Solutions Uk door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped Class 10th Science Chapter 3 Ncert Solutions Uk in a particular solution.
The bangles sparkled like new but their weight was reduced drastically.
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