Corrosion in case of Iron is known as …..….. k. When iron reacts with oxygen and moisture forms a red substance called …….... l. Layer of ……………. aluminium exposure to air, gets coated with a protective layer of, 7. called, 2. Define the type of chemical reactions taking place. A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. (iii) Dissolution of ammonium chloride in water. Chemical reaction zinc oxide reacts with carbon to produce Zinc metal and carbon monoxide. Thermal decomposition of a substance with cracking sound is called decrepitation. A aluminium exposure to air, gets coated with a protective layer of, A What happens when dilute sulphuric acid is poured on Zinc granules? (ii) Sodium Nitrite and Ammonium Chloride. Write the chemical name of one of the products obtained. Write the balanced chemical equations and complete the following reaction and identify the type of reaction. Write the skeletal equation for the following reactions. A combination reaction is the reverse of a decomposition reaction. reaction in which two or more reactants combine to form a single product is Ans . Write the name of brown coloured gas that evolves when lead nitrate crystals are heated in a dry test tube. If a Now answer the following: When a chemical reaction considered a double displacement reaction? What is corrosion? Name the process which is responsible for this change. c. The reactants are written on the right e. Respiration is an endothermic reaction. Class 9: Solution Of Force and Law of Motion, Class 9: Solution of Matter in Our Surroundings, Class10: Solution of Chemical Reaction And Equation. Give reason. The balanced chemical equation is as follows : 2Pb(NO3)2 + heat = 2PbO+4NO2+O ( also an example of THERMAL DECOMPOSITION reaction.) (b) Giving one example of each, define the following terms: (a) Most of the metals acquired a dull surface when exposed to air. b. (ii) What another name can be given to this precipitation reaction? What will be the molecular mass of Ammonia? The student takes 2 gm of ferrous sulphate crystal in a dry test tube and heats the test tube. When food containing fat or oil is not used and left for a long time they smell and taste changes. What is meant by the endothermic reaction? I. substance gains hydrogen or loses oxygen during a reaction, it is said to be …, Process (a) What is an oxidation and reduction reaction? Identify the substance oxidized and the substance reduced in the reaction. Write two observations that you will make when an iron nail is kept in an aqueous solution of copper sulphate. Why is hydrogen peroxide kept in colored bottles? Non-metallic character increases from ____. g.  An acid and a base react together to form ……….and ……….. h. An oxidising agent gets ………. Class 10 : Solution of How Do Organism Reproduce? takes place. Write a balanced equation for the reaction between magnesium and hydrochloric acid. Which one is chemical change - rusting of iron or melting of iron? What is the name of the process where gas is directly converted to solids called? What happened when quicklime is added to water? What is a combination reaction.? Aqueous If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y. j. O crystals. (i) Write a balanced chemical equation of the reaction involved. The gas evolved turns moist lead acetate paper silvery black. How many litres of water must be added so as to get a resultant solution containing 3%salt? 4. (ii) Silver metal is added to copper sulphate solution. II. state one example giving a balanced chemical equation for the reaction? (b) Name the type of chemical reaction that has taken place stating its balanced equation. 30 litres of salt solution contains 5% salt. (a) Hydrogen sulphide reacts with Sulpher dioxide to form Sulpher and water. (3)Glowing splint rekindles. I. Aqueous solution of sodium sulphate and barium Chloride reacts as follows :ZnSO. The boiling tube is heated over the flame. How does this colour change upon heating? Write the chemical reaction involved and also mention the type of reaction. On heating copper powder in the air, the surface of copper powder becomes coated with black CuO. Short answer type questions: 1. Under what conditions do these grapes ferment? What is redox reaction? When (b) What is the colour of the precipitate? d. During a chemical reaction, there is a breaking of bonds between atoms of the reacting molecules to give …….... e. A ……….. reactive element displaces less reactive element from its aqueous salt solution. I. Report Error Name and state the law which is kept in mind while we balance chemical equations. Cloudflare Ray ID: 5f889daf5d2ffe1c Chemistry Questions & Answers for Bank Exams : Name the reddish brown gas evolved when Lead Nitrate is heated strongly. n. Rancidity can be prevented by adding ………….. a. View Answer Colourless gas with rotten egg smell is evolved. State the reason, aluminum is more reactive than iron, yet its corrosion is less that of iron. g. If a substance gains oxygen or loses hydrogen Name the gas evolved when the following mixtures are heated : (i) Calcium hydroxide and Ammonium Chloride. A small amount of calcium oxide is taken in a beaker and water is added slowly to it. A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by the emission of light. indicates the direction of the reaction. of electrons. Your IP: 68.66.200.211 (a) list any two changes which take place when oily food gets oxidized. The boiling tube is heated over the flame. Define a chemical reaction. Write the balanced chemical equations for the following reaction and identify the type of reaction. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy? Identify endothermic or exothermic reactions. Why do we store silver chloride in dark coloured bottles? Name the compound formed when. takes place. Identify in the following reaction, the substance oxidised and the substance reduced. I. The Name the gas which turns acidified potassium dichromate clear green. or removal of ………. Answer the following questions on the basis of observations made by the student: Write a balanced chemical equation for the reaction involved.

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