NCERT Q10 - Imagine that you are sitting in a chamber with your back Dec 17, �� Answer: SCERTs and NCERT design the NTSE exam question paper of 10th Ncert Question Answer Youtube both the stages respectively. There is no provision regarding the number of questions from 9th and 10th class syllabus. Check the NTSE Exam Analysis to know about the 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube subject and class-wise weightage of the exam. The Syllabus is designed as per the guidelines of NCERT and is helpful for CBSE students. The syllabus provides the conceptual 10th Ncert Question Answer Youtube background and basic foundation for higher classes. Download NCERT Syllabus for Class 9. Students can get the NCERT Syllabus for Class 9 . Feb 26, �� The official JEE 10th Ncert Question Answer Youtube Main Feb 26 question paper and answer key has been released by the National Testing Agency.
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Updated on Jan 7, - p. Download here. Click here. Part No. Latest Articles. Read More. Students can check last 5 years CBSE 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube previous year 1uestion pa View All News and Articles. Showing 86 out of 86 Questions. Anurag Khanna 20th Mar, Hello Aspirant, If we go through the analysis of marks Vs Percentile Vs rank for JEE-Main then according to the marks mentioned by you in the question your percentile is expected to be in the range of Good Luck!! Answer later. Answer: Homologous series : A homologous series is a group of organic compounds having similar structures and similar chemical properties in which the successive compounds differ by -CH 2 group.

Characteristics of homologous series : i All members of a homologous series can be represented by the same general formula. Question 7 How can ethanol 10th Ncert Question Answer Youtube and ethanoic acid he differentiated on the basis of their physical and chemical properties? Answer: Difference on the basis of physical properties. Question 8 Why does micelle formation take place when soap is added to water? Will a micell be formed in other solvents such as ethanol also?

Answer: Micelle formation takes place when soap is added 10th Ncert Question Answer Youtube to water because the hydrocarbon chains of soap molecules are hydrophobic water repelling which are insoluble in water, but the ionic ends of soap molecules are hydrophilic water attracting and hence soluble in water. Such micelle formation will not be possible in other solvents like ethanol in which sodium salt of fatty acids do not dissolve. Question 9 Why are carbon and its compounds used as fuels for most applications?

Answer: Carbon and its compounds give a large amount of heat per unit weight 10th Ncert Question Answer Youtube and are therefore, used as fuels for most applications. Question 10 Explain the formation of scum when hard water is treated with soap. Answer: Hard water contains salts 10th Question Answer Youtube Ncert Youtube 10th Answer Question Ncert of calcium and magnesium. Calcium and magnesium on reacting with soap form insoluble precipitate called scum. The scum formation lessens the cleansing property of soaps in hard water.

Question 11 What change will you observe if you test soap with litmus paper red and blue? Answer: Red litmus will turn blue because soap is alkaline in nature. Blue 10th Ncert Question Answer Youtube litmus remains blue in soap solution.

Question 12 What is hydrogenation? What is its industrial application? Answer: The addition of hydrogen to an unsaturated hydrocarbon to obtain a saturated hydro-carbon is called hydrogenation. The process of hydrogenation takes place in the presence of nickel Ni or palladium Pd metals as catalyst.

Application : The process of 10th Ncert Question Answer Youtube hydrogenation has an important industrial application. It is used to prepare vegetable ghee or vanaspati ghee from vegetable oils. So addition reaction take place only in C 3 H 6 and C 2 H 2. Question 14 Give a test that can be used to differentiate chemically between butter and cooking oil. Answer: Butter is a saturated 10th Ncert Question Answer Youtube carbon compound while cooking oil is an unsaturated carbon compound.

An unsaturated compound decolourises bromine water, while a saturated compound cannot decolourise it. So we can distinguish chemically between a cooking oil and butter by the bromine water. Add bromine water to a little of cooking oil and butter taken in separate test-tubes. Question 15 Explain Answer 10th Youtube Ncert Question the mechanism of the cleaning action of soaps. OR Explain the cleansing action of soaps.

In this way the soap micelle entraps the oily or greasy particles by Youtube Answer 10th Ncert Question using its hydrocarbon ends. The ionic ends of the soap molecules in the micelles, however, remain attached to water. When the dirty cloth is agitated in soap solution, the 10th Ncert Question Answer Youtube oily and greasy particles present on its surface and entrapped by soap micelles get dispersed in water due to which the soap water becomes dirty but the cloth 10th Ncert Question Answer Youtube gets cleaned.

The cloth is cleaned thoroughly by rinsing in clean water a number of times. Carbon compounds: Covalent bonding in carbon compounds, Versatile nature of carbon, Homologous series, Nomenclature of carbon compounds containing functional groups, halogens, alcohol, ketones, aldehydes, alkanes, and alkynes , difference between saturated hydrocarbons and unsaturated hydrocarbons.

Chemical properties of carbon compounds combustion, 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube oxidation, addition and substitution reaction. Ethanol only properties and uses , Ethanoic acid only properties and uses , soaps and detergents. Formulae Handbook for Class 10 Maths and Science. Question 10th Ncert Question Answer Youtube Youtube Ncert Answer 10th Question 10th Ncert Question Answer Youtube 2 What would be the electron dot structure of a molecule of sulphur, which is made up of eight atoms of sulphur? Hint � The eight atoms of sulphur are joined together in the form of a ring. Question 3 How many structural isomers can you draw for pentane?

Solution: We can draw 3 structural isomers for Answer 10th Ncert Youtube Question 10th Ncert Question Answer Youtube pentane. Question 4 What are the two properties of carbon that lead to the huge number of carbon compounds we see around us?

Solution: Due to its large 10th Ncert Question Answer Youtube valency, carbon atoms can form covalent bonds with a number of carbon atoms as well as with a large number of other atoms such as hydrogen, oxygen, nitrogen, 10th Ncert Question Answer Youtube sulphur, chlorine and many more atoms. This leads to the formation of a large number of organic compounds. Question 5 What will be the formula and electron dot 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube structure of Cyclopentane?

Question 6 Draw the structures for the following compounds. Ethanoic acid ii. Bromopentane iii. Butanone iv. Hexanal Solution:. Question 7 How would you name the following compounds? Solution: i. Ethyl bromide ii. Formaldehyde iii. Question 8 Why is the conversion of ethanol to Ethanoic acid an oxidation reaction? Solution: The conversion of ethanol into ethanoic acid is called an oxidation reaction because oxygen is added to it during this conversion.

Question 9 A mixture of oxygen and ethyne is burnt for welding. Solution: 10th Ncert Question Answer Youtube When a mixture of oxygen and ethyne is burnt, it burns completely producing a blue flame.

This blue flame is extremely hot which produced a very high temperature which is used for welding metals. But the mixture of ethyne and air is not used for welding purposes because burning of ethyne in air produces a 10th Ncert Question Answer Youtube sooty flame, which is not enough to melt metals for welding.

Question 10 What are oxidizing agents? Solution: Oxidizing agents are the substances that gain electrons in an redox 10th Ncert Question Answer Youtube reaction and whose oxidation number is reduced.

Question 11 Explain the nature of the covalent bond using the bond formation of CH 3 Cl. Solution: CH 3 Cl 10th Ncert Question Answer Youtube methyl chloride is made up of one carbon atom, three hydrogen atoms and one chlorine atom.

Carbon atom has 4 valence electrons, each hydrogen atom has one valence 10th Ncert Question Answer Youtube electron, and a chlorine atom has 7 valence electrons. Carbon atom shares its four valence electrons with three hydrogen atoms and 1 chlorine atom to form methyl chloride 10th Question Answer Youtube Ncert 10th Ncert Question Answer Youtube Ncert Question Answer 10th Youtube as follows: From the above reaction, in the dot structure of methyl chloride CH 3 Cl there are four pairs of shared electrons between carbon and other atoms.

Each 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube pair of shared electrons constitutes one single covalent bond. So, methyl chloride has four single covalent bonds. Question 12 Draw the electron dot structures for- Solution:. Question 13 10th Ncert Question Answer Youtube What is a homologous series?

Solution: Homologous series is a series of compounds with a similar general formula, possessing similar chemical properties due to the presence of the same functional group, and shows a gradation in physical properties as a result of increase in molecular size and mass. For example, methane has a lower boiling point 10th Ncert Question Answer Youtube than ethane since it has more intermolecular forces with neighbouring molecules.

This is because of the increase in the number of atoms making up the molecule. Question 14 How can ethanol and Ethanoic acid be differentiated on the basis of their physical and chemical properties? Solution: i Ethanol has a pleasant smell whereas ethanoic acid has the 10th Ncert Question Answer Youtube smell of vinegar.

Question 15 Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube also? Solution: Micelle formation takes place when soap is added to water. This is because when soap is added to water in which dirty clothes are soaked, the 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube two parts of the soap molecule dissolves in two different mediums. The organic tail dissolves in the dirt, grime or grease and the ionic head dissolves in water.Answer Question Ncert 10th Youtube 10th Ncert Question Answer Youtube

When the clothes are rinsed or agitated, the dirt gets pulled out of the clothes in the water by the soap molecule. In this way the soap does 10th Ncert Question Answer Youtube its cleaning work on dirty and grimy clothes or hands. The soap molecules actually form a closed structure because of mutual repulsion of the positively charged heads. This structure is called a micelle. Question 16 Why are carbon and its compounds used as fuels for most applications?

Solution: Carbon and its compounds are used as fuels for 10th Ncert Question Answer Youtube most of the applications because they burn in air releasing a lot of heat energy. Question 17 Explain the formation of scum when hard water is treated with Question Youtube Ncert 10th Answer Question Ncert Answer Youtube 10th soap. Solution: The precipitate form of scum is formed when soap is used for washing clothes.

With hard water, a large amount of soap is wasted in reacting with the calcium and magnesium ions of hard water to form an insoluble precipitate. The precipitate form formed by the action of hard water on soap, sticks to the clothes being washed and interferes with the cleaning ability of the additional soap. This makes the cleaning of clothes difficult. Question 18 What change will you observe if 10th Ncert Question Answer Youtube you test soap with litmus paper red and blue?

Solution: Soap is the salt of a strong base NaOH and a weak acid carboxylic acid , so a solution Answer Youtube Question Ncert 10th of soap in water is basic in nature. Being basic, a soap solution turns red litmus paper blue. With the help of NTSE model question paper , students can easily analyze their preparation level. Read this complete article to know the steps to download NTSE question papers , , and old years.

NTSE Result released. Check state-wise result dates. Step 10th Ncert Question Answer Youtube by step guidelines to download the NTSE question papers are provided below. The marking scheme followed in the NTSE class 10 question papers is provided in the table 10th Ncert Question Answer Youtube below. The syllabus for NTSE stage 1 and stage 2 exams are the same, only difficulty level changes in both the stages.

The important topics for NTSE exam 10th Ncert Question Answer Youtube are given below. The table given below provides the link to download NTSE question papers of the exam. Students can check the NTSE stage 1 result online in the form of a merit list.

NTSE cut off will also be released along with the result. The cutoff marks are the minimum marks that students should obtain in the NTSE exam to qualify both the stages. The cut off depends on various factors including difficulty level of NTSE question papers , state quota, number of students appeared and more.

While solving the NTSE question papers, students can analyze their strong and weak areas and subsequently work upon them. They must also practice and solve the 10th Ncert Question Answer Youtube question paper in the mentioned time without compromising the accuracy. The direct links to download previous year NTSE question papers have been provided below.

NTSE Sample papers are also helpful for candidates to practice with the types of questions asked in the exam. Go through the important points which should be kept in mind while solving 10th Ncert Question Answer Youtube question papers of NTSE. You can also download the same using the links given above. There is no provision regarding the number of questions from 9th and 10th 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube class syllabus. Answer: There is not much difference between both as the Syllabus and exam pattern will be the same. There will be a slight difference between the difficulty level of both NTSE question papers.

Questions are generally asked from Class 9 and 10 syllabus. You can download NTSE previous year question papers along with answers by visiting our page which link is provided below. Scert bihar will declare the result on 1st of March It will be released in online mode and you have 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube to check it by visiting it's official website.

It will be released in the form of pdf. It is quite hard to predict the exact shortlisting ratio Youtube Answer Ncert Question 10th 10th Ncert Question Answer Youtube because it keeps on changing depending upon various factors like difficulty level of paper, top score for this year and so on. So if you belongs to General 10th Ncert Question Answer Youtube category then you need at least marks out of in stage -1 to get qualified for stage 2 but still we have to wait because the cut-off mentioned above is only the expected cut-off.

Cut off depends upon various factors such as the difficulty level of stage 1 exam, Kerala State quota, number of students appeared in 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube 10th Ncert Question Answer Youtube the stage 1 exam, last year's NTSE Kerala cutoff and so on. You can also check out complete details about the expected cut-offs for NTSE Kerala from the link given below It is quite hard to predict the total number of students appeared for NTSE stage-1 in Kerala because no official notification has been issued Question Ncert Youtube Answer 10th 10th Ncert Question Answer Youtube regarding the same by the competent authorities but the figure is expected to be around When you look back in life , this app would have played a huge role in laying the foundation of your career decisions.

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