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There Ncert Solutions For Class 10th Science Chapter 9 Rate comes the grade when capitalism contingency be reigned in when it starts encroaching ncert solutions for 10th science areas which should be solutiobs .
Differentiate between saturated and unsaturated hydrocarbons. What is catenation? What is its property? What is meant by saponification? How does soap help to wash the clothes?
Important Questions on 10th Science Chapter 4 What is a homologous series? A homologous series is a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group. How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties? Ethanol is a liquid at room temperature with a pleasant odour while ethanoic acid has vinegar-like smell.
This is below room temperature and hence, it freezes during winters. Why are carbon and its compounds used as fuels for most applications? Most of the carbon compounds give a lot of heat and light when burnt in air. Saturated hydrocarbons burn with a clean flame and no smoke is produced.
The carbon compounds, used as a fuel, have high calorific values. Therefore, carbon and its compounds are used as fuels for most applications. Explain the formation of scum when hard water is treated with soap. Soap does not work properly when the water is hard. A soap Ncert Solutions For 10th Science File is a sodium or potassium salt of long chain fatty acids.
Hard water contains salts of calcium and magnesium. When soap is added to hard water, calcium and magnesium ions present in water displace sodium or potassium ions from the soap molecules forming an insoluble substance called scum. A lot of soap is wasted in the process. What change will you observe if you test soap with litmus paper red and blue? Acids, Bases and Salts chapter mainly explains the difference between acids, bases and salts.
It also deals with various types of reactions related to these three forms of chemical compounds. Some important topics involved in this chapter are:. Important topics covered in this chapter are:. Carbon and its Compounds chapter describes various features of carbon element and different compounds formed by it.
Give below are the main topics covered in class 10 Science Chapter Here students get to learn the carious concepts related to the classification of elements. Some major concepts discussed in this chapter are:. Life Processes chapter deals with the various biological processes and reaction taking place in organisms. Some major topics covered in this chapter are:. Control and Coordination chapter gives details of different ways in which organisms respond to the stimuli.
Here you also get to know about the human nervous system, automatics and voluntary actions, exocrine and endocrine glands, etc. How do Organisms Reproduce chapter students get to learn different methods of reproduction in plants and animals and get aware of the various methods of birth control in humans. Some of the important topics discussed in this chapter are:. Modern Periodic Law : the physical and chemical properties of elements are the function of their atomic numbers.
As the effective Ncert Solutions For Class 10th Science Chapter 4 Error nuclear charge on the valence electrons in the metals is comparatively less, they have tendency to form cations. Fluorine atom is smaller than chlorine atom as it has less number 2 of shells compared to that in chlorine shells 3. Isotopes are the elements having similar chemical properties but different atomic masses. For example, argon with atomic mass of 40 comes before potassium with atomic mass Iodine at.
For example, copper, silver and gold are placed in the same group with alkali metals. Mercury, lead and barium which possess similar properties fall into different groups. Question 2: Mention the position of i hydrogen and ii isotopes of same element in the modern periodic table. Answer 2: i Hydrogen is placed at the top of group IA. Question 1: Why is atomic number of an element more important to a chemist than its atomic mass? Or Atomic number is considered to be a more appropriate parameter than atomic mass for classification of elements in a periodic table.
Answer 1: The properties of element depend upon the number of electrons present in the valence shell which are related to atomic number. Thus the properties of different elements can be compared if we know their atomic numbers. On the other hand, atomic mass can in no way determine the chemical properties of elements, because is does not vary regularly with gradation in the chemical properties of elements.
Justify your answer in each case. Answer 2: a Electronic configuration of X is 2, 8, 8, 2. Its valency is 2. It belongs to group 2 and can lose 2 electrons easily.
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