ITS THE LITTLE THINGS THAT MAKE LIFE BIG

Transcription

1 JAGANNATH INTERNATIONAL SCHOOL HOLIDAY HOME WORK X ITS THE LITTLE THINGS THAT MAKE LIFE BIG A p p re c i a te n a tu re Spend tim e w ith fa m ily Wa tc h s u n ri se Ta ke p ic tu r es Re a d in s p ir in g q u o te s Wish you all Happy Holidays..enjoy and work hard!

2 हहहदद पप पर-बब ग बननकर उसमम 'पलनसससक कक ररकथनम' सस बससधत सलरगन सलसखए एकल मस चन (मरनर एकस) हप तत सकसक भक पनततर कन असभनय हनव-भनव ससहत तब यनर ककसजए आशत -भनषण कप सलए सनमन सवषयय पर तब यनरक ककसजएपलनसससक सबनन जकवन कक कलपनन / वव कय सप हक अब जकवन समभव/ वव कय कक ददर भरक कहननक/ नदक कक आतम कथन/ वनह रप! भतरषसनचनर/ मत झप सब सनक बननन हब /मप रप जकवन कक असभलनषन/ बत जत गर हमनरक धररहर/पलनसससक कन पतरयरग जनमप अनप क ररग / कनश! मम पस ख लगनकर उड़ सकतन हवषय ममहखक रप मम हद ततययर करनय हह ) सहस दक-सवकनस मस च कक ओर सप जत लनई मनस मम हरनप वनलप सहस दक ओलसमपयनड कक तब यनरक ककसजए ककन मम करवनए गए पनठठकत रम कक आवव सत ककसजए (यय

3 MATHEMATICS

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7 CHEMISTRY Complete the given assignment and submit on ruled sheets in a folder. Q1: Translate the following statements into balanced chemical equations a. Hydrogen gas combines with nitrogen to form ammonia. b. Hydrogen sulphide gas burns in air to give water and sulphur dioxide c. Barium chloride reacts with ammonium sulphate to ammonium chloride and precipitate(ppt) of barium sulphate d. hydrogen gas. Potasium metals reacts with water to potassium hydroxide and e. Iron fillings react with steam to produce iron (III) oxide and hydrogen f. Aluminum metal reacts with iron (II) oxide powder to produce aluminum gas. oxide solid and iron metal. g. Ammonia gas (NH3) plus oxygen gas yields nitrogen monoxide gas plus water vapour h. Calcium hydroxide solution and carbon dioxide gas yields solid calcium carbonate and Liquid water. i. Aqueous iron (III) chloride and sodium carbonate solution yields aqueous sodium chloride and a precipitate of iron (III) carbonate. j. carbon dioxide gas. Solid iron (III) oxide and carbon monoxide gas yields iron metal and

8 k. Magnesium carbonate solution plus aqueous hydrochloric acid (HCl) yields magnesium chloride solution plus liquid water and carbon dioxide gas l. Silicon dioxide solid plus aqueous hydrofluoric acid (HF) yields solid silicon tetrafluoride plus liquid water Q2: Rewrite the following reaction by correcting and then balancing (a) KClO3 KCl2 + O2 (b) Ca + O CaO (c) NH3 + CuO Cu + N + H2O (d) Pb + CuCl2 PbCl (e) CO2 + CaOH CaCO3 + H2O Q3: Identify the charge on each species. ZnSO4 Zn= +2 PbSO4 HNO3 KBr FeSO4 MgSO4 NaCl Balance the chemical equations a) b) c) d) e) f) g) h) SO4= -2 Al + NaOH Na 3AlO3 + H2 C12H22O11 + O2 CO2 + H2O Ca3(PO4)2 + H2SO4 CaSO4 + H3PO4 FeOCr2O3 + K2CO3 + O2 K2CrO4 + CO2 + Fe2O3 Cu + HNO3 Cu(NO3)2 + NO + H2O SiF4(s) + NaOH(aq) Na4SiO4(s) + NaF(aq) + H2O(l) Na2B4 O7 + HCl + H2O NaCl + H3BO3 MnO2 + K2CO3 + O2 KMnO4 + CO2 i) KMnO4 + HCl KCl + MnCl2 + H2O + Cl2 Q4:

9 j) k) l) m) Si + NaOH Na4SiO4 + H2 Cu + HNO3 Cu(NO3)2 + NO + H2O FeCl2 + KNO3 + HCl FeCl3 + NO + H2O + KCl KMnO4 + HBr MnBr2 + Br2 + KBr + H2O n) K2Cr2O7 + HCl KCl + CrCl3 + H2O + Cl2 Q4. A metal nitrate on heating gives A yellowish brown metal oxide along with A brown gas B and a A colourless gas C. aqueous solution of A on reaction with potassium iodide forma a yellow precipitate of compound D.Identify A,B,C and D. Q5. Ferrous sulphate crystals decomposes with the evolution of a gas with a characteristic smell of burning sulphur. Write the chemical reaction involved and the type of reaction. Q6. A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. Write the type of chemical reaction and the corresponding balanced chemical equation. Q7. In a solution of copper sulphate, a strip of metal M was inserted. After sometime, the colour of copper sulphate solution faded away. Which metal is more reactive and which one is less? Give equation.also mention the type of reaction. Q8. Name one metal which can displace zinc from its salt solution and one metal which cannot displace zinc from its salt solution. Q9. What happens when limestone is heated strongly? What type of reaction is this? Q10. What happens when an aqueous solution of barium chloride is mixed with an aqueous solution of sodium sulphate? Write the equation also. Q11. Give an example of a reaction which is both an exothermic and combination reaction. Q12. Why does milkiness disappear when carbon dioxide is passed through lime water in excess?

10 Q13. Suggest any two observations in an activity which may suggest that a chemical reaction has taken place. Give example in support of your answer. Q14. What is wrong with the following equation- N + 3H NH 3 Q15. Solid calcium oxide was taken in a container and water was added to it slowly. (i) State any two observations made in the experiment. (ii) Write the name and chemical formula of the product. BIOLOGY Revise the chapter Life Processes thoroughly and practice all the diagrams well. Roll No These days, new types of plastics which are said to be biodegradable plastics are available. Find out more about such materials and whether they do or do not harm the environment. Present this information on a beautifully designed pamphlet, brochure or flash cards. Roll No Plastic waste is being generated on a large scale and as it is non-biodegradable, it is adding to the trash on earth. What best use can it be put to? Present this information on a beautifully designed pamphlet, brochure or flash cards. PHYSICS 1. Prepare a brouchure on the given topics as per the roll nos. Roll Nos. Topic 1 6 Vertical Gardening 7 12 Problem of plastic disposal How to reduce water wastage 19 onwards Composting at home *Include pictures, illustrations and useful information. 2. Complete the given assignment and submit on ruled sheets in a folder. ASSIGNMENT Q1. A refrigerator having a power rating of 40W operates 8 hours every day. If the electrical energy is charged at the rate of Rs.3 per KWH, calculate the cost of operating this refrigerator for a month of 30 days. Q2. A wire of resistance R is cut into five equal parts. These five parts are then connected in parallel. If the equivalent resistance of this combination be R, then calculate the ratio R/R. Q3. If 100J of heat are produced each second in a 4 ohm resistor, calculate the potential difference across the ends of the resistor.

11 Q4. Show how you would connect three resistors, each of resistance 6 ohm, so that the combination has a resistance of (i) 2 ohm (ii) 9 ohm. Q5. A battery of 9V is applied across resistors of 0.2 ohm, 0.3 ohm, 0.4 ohm, 0.5 ohm and 12 ohm connected in series. How much current would flow through the 12 ohm resistor? Q6. A hot plate of an electric oven connected to a 220V line has two resistance coils A and B, each of 24 ohm resistance. What current will flow in the circuit : a) If each coil is used separately. b) If the two coils are connected in series. c) If the two coils are connected in parallel. Q7. Which uses more energy : a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes? Q8. Calculate the heat produced when 96000C of charge is transferred in 1 hour through a potential difference of 50 V. Q9. Two resistance wires of the same material and of equal lengths and equal diameters are first connected in series and then in parallel in an electric circuit. Calculate the ratio of heat produced in series and parallel combinations of the resistance wires. Q10. Draw a sketch to show the magnetic field pattern due to a bar magnet. Also describe the field pattern briefly. SOCIAL SCIENCE Prepare a project on the topic : Evolution of money, its importance and functions.