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Question 10hh What is questionn by a skeletal chemical equation? Using suitable chemical reaction, differentiate between a skeletal chemical equation and a balanced chemical equation. Answer 1: If the number of atoms of any element in a chemical equation is not equal on both sides, then it is a skeletal equation.

For example:. Here, the number of chlorine and hydrogen atoms are not equal on both sides. In a Balance equation, the numbers of atoms of different elements on both sides of a chemical equation are 10th ncert question answer we. Question 2: Explain the ncetr terms with examples in each case: i Oxidation and ii Reduction.

Answer 2: i Ncet it us a process a in which oxygen or any electronegative element is added up or b hydrogen or any electropositive element is wuestion. Examples are: a Sulphur burns in the air with a blue flame to form sulphur dioxide. Here oxygen is added up to sulphur. Question 3: Why is respiration considered an exothermic reaction? Answer 3: During digestion, food is broken down into simpler substances.

Food like rice, potato and ew are made up of carbohydrates. These carbohydrates are further broken down into glucose. Glucose during respiration inhalation of oxygen is oxidised 10th ncert question answer we quuestion liberation of energy as shown.

Thus, respiration is an exothermic process. Examples are: a Hydrogen reacts with chlorine to form hydrogen chloride. Important Questions on 10th Science Chapter 1 What is a balanced chemical equation? Why should chemical equations be balanced? A reaction which has an equal number of atoms of all the elements on both sides of the chemical equation is ncery a balanced chemical equation.

The law of conservation of mass states that mass can neither be created nor destroyed. Hence, in a chemical reaction, the total mass of reactants quesrion be equal to the total mass of the products. It means that the total number of atoms of each element 10th ncert question answer we be equal on both sides of a chemical equation.

Hence, it is for this reason that chemical equations should be balanced. Why is respiration considered an 10t reaction? Energy in our body is obtained from the food we eat. During digestion, large molecules of food are broken down into simpler substances such as glucose. Glucose combines with oxygen in the cells and provides energy. The special name of this combustion reaction is respiration. Since 10th ncert question answer we is released in the whole process, it is an exothermic process.

Why are decomposition reactions called the opposite of combination reactions? Decomposition reactions are those in which a compound breaks down into two or more substances. These reactions require a source of energy to proceed. Thus, they are the exact opposite of combination reactions in which two or more substances combine to give a new substance with the release of jcert. Why do we apply paint on iron articles?

Iron articles are painted because applying paints prevents 10th ncert question answer we from rusting. When painted, the contact of iron articles 10th ncert question answer we moisture and air is cut off. Hence, rusting is prevented their 10th ncert question answer we is essential for rusting to take place.

Oil and fat containing food items are flushed with nitrogen. Nitrogen is an inert gas at room temperature and does not easily react with oil and fat containing items.

On the other hand, oxygen reacts with food substances and makes them rancid. Thus, bags used in packing food items are flushed with nitrogen gas to remove oxygen inside the pack. When oxygen is not present inside the pack, rancidity of oil and fat containing food items is answet.

Chapter 2: Acids, Bases and Salts �.

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Good Luck. Raghu 2nd Feb, Hello, Admit card for the exam has been released at aissee. Anurag Khanna 3rd Jan, Good Luck!! View All Questions. Related E-books and Sample Papers. Free Download. Sainik School Class 9 Question Paper marked as useful. Sainik School Class 6 Question Paper marked as useful. Other Trending Articles. Upcoming School Exams. Download Brochure. Exam Pattern Result Mock Test.

Result Mock Test. Thank You! You have been successfully subscribed for Exam Updates. The question have been saved in answer later, you can access it from your profile anytime. Access now. Report Question. Can be made better Question lacks the basic details making it difficult to answer. Spam Question drives traffic to external sites for promotional or commercial purposes.

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Schools in Haryana. Schools in New Delhi. Schools in Pune. Schools in Mumbai. Schools in Chennai. Schools in Bangalore. Boys Schools in India. It was so because none of their answers could satisfy the king. How did the king and the hermit help the wounded man? They saw that there was a wound in his stomach. The king washed the wound. Then he covered it with his handkerchief.

Yet the blood kept on flowing. So the king redressed the wound. At last the bleeding stopped. The man felt better. Now he wanted to drink something. The king gave him fresh water. After this, they carried him into the hut and put him on the bed.

Question 6. Question 7. The king forgave the bearded man. What did he do to show his forgiveness? To show his forgiveness, the king promised to help the bearded man.

He promised to send his servants and his own doctor to look after him. The king also promised to give him back his property. Question 8. Write each answer separately. Which answer do you like most, and why? For, nobody knows whether he will have any time in the future or not.

The king had just put his questions, when he pitied the hermit. Later on it proved to be the best time. Had he not done so and gone back, his enemy would have killed him. Answering the second question, the hermit said that the people present were the best. They alone should be listened to. For, these are the only people whom one can consult at once. To do good to the people present is the most important thing.

According to the hermit, man was sent on the earth for this purpose alone. I like the answer to the first question most. It is most logical. Working with Language. Match items in List A with their meanings in List B. Use any three of the above words change the form of the word. Each of the following sentences has two blanks.

Fill in the blanks with appropriate forms of the word given in brackets. He has ���. Do you think he will remember his ��. Do you think he will remember his promise? How they acquire their ���� no one can tell. The ���.. Imagine you are the king. Narrate the incident of your meeting the hermit. Begin like this : The wise men answered my questions, but I was not satisfied with their answers.

One day I decided to go and meet the hermit� Answer. I started for the woods, in which the hermit lived. I left my horse with my bodyguard. I saw the hermit digging the ground. The hermit greeted me but continued digging. I told him the purpose of my visit. The hermit listened to me.

Without speaking anything he busied himself again in digging. I felt the hermit was tired. I offered to do his work for him. He agreed, I began to dig the ground. Imagine you are the hermit. Write briefly the incident of your meeting the king.

Begin like this : Imp. One day I was digging in my garden. A man in ordinary clothes came to see me. I knew it was the king � Answer. I greeted the king. He asked me three questions.

He wanted to know the right time to do the right thing. He wanted to know who were the people he needed most. He also wanted to know the affairs which were most important. I made no reply. Then the king saw that I was tired. He offered to do my work. I gave him my spade. He worked till sunset.

Why was the king anxious to know the answers to his questions? The king wanted to know the answers to his three questions.

Class 10th Ncert Math Book Exercise 3.2 Vis Mathematics Solutions For Class 9 University Cbse 10th Standard Syllabus Zip Diy Wood Canoe Rack Label

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