10-Sci-Chemical-reaction-and-Equations-Notes.pdf

Source: EDUDEL 1 For more free DOWNLOADS, visit www.aspirationsinstitute.com  Magnesium oxide. 2 2 be 2 For more free DOWNLOADS, visit www.aspirationsinstitute.c...

Source: EDUDEL 1 For more free DOWNLOADS, visit www.aspirationsinstitute.com  Magnesium oxide. 2 2 be 2 For more free DOWNLOADS, visit www.aspirationsinstitute.com  3 For more free DOWNLOADS, visit www.aspirationsinstitute.com  (iii) 2Pb (NO3)2 2PbO+4NO2(g)+O2 (lead nitrate) (lead oxide) (Nitogen dioxide) 4 For more free DOWNLOADS, visit www.aspirationsinstitute.com  Silver chloride turns grey on exposure to sunlight white precipitate of BaSO4 is formed, so it is also called precipitation reaction. 5 For more free DOWNLOADS, visit www.aspirationsinstitute.com  (ii) 2KI + Pb(NO3)2 +PbI2 +2KNO3 (potassium Iodine) (Lead Nitrate) (Lead iodide) (Potassium nitrate) (Yellow ppt.) (Yellow ppt.) (iii) 2KBr+BaI2 2KI + BaBr2 (Potassium Bromide)+(Barium iodide) (Potassium iodide) + (Barium bromide) 6 For more free DOWNLOADS, visit www.aspirationsinstitute.com Q. 1 The shiny inish of wall after white wash is because of. a) Calcium oxide b) Calcium hydroxide c) Calcium Carbonate d) Calcium phosphate Q. 2 Electrolysis of water is decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is a) 1:1 b) 2:1 c) 4:1 d) 1:2 Q. 3 Which the following statements about the given reaction are correct: 3Fe(s) + 4H2O (g) Fe2O3(s) + 4H2(g) i) Iron metal is getting oxidized ii) Water is getting reduced iii) Water is acting as reducing agent iv) Water is acting as oxidizine agent a) (i), (ii) and (iii) b) (iii) and (iv) c) (i), (ii) and (iv) d) (ii) and (iv) Q. 4 In order to prevent the spoilage of potato chips, they are packed in plastic bags containing the gas a) Cl2 b) O2 c) N2 d) H2 Q. 5 The process of respiration is - a) an oxidation reaction which is endo thermic b) a reduction reaction which is exothermic c) a combination reaction which is endo thermic d) an oxidation reaction which is exothermic Ans 1 (c) 2 (b) 3 (c) 4 (c) 5 (d) 7 For more free DOWNLOADS, visit www.aspirationsinstitute.com Q. 6 Give an example of double displacement reaction? (CBSE 2010, 2011) Q. 7 Name the reducing agent in given below chemical reaction 3 MnO2 + 4Al 3 Mn+2Al2O3 (CBSE-2016) Q.8 Name the brown coloured gas evolved when lead nitrate crystal are heated in dry test-tube. Q. 9 Give reasons- a) Silver chloride is stored in dark coloured bottles. b) Copper vessel loses shine when exposed to air c) Iron is places copper from copper sulphate solution. Q. 10 Identify the following reactions as i) combination ii) decomposition iii) displacement reactions and double displacement reaction. i) ZnCO3(s) ZnO(s) + CO2 (g) ii) Pb(s) + CuCl2 PbCl2 (aq) + Cu(s) iii) H2 (g) + a2(g) 2HCl iv) CaCo3 (s) CaO (s) + CO2 (g) v) NaCl(g) + AgNO3 (a) AgCl + NaNo3 vi) 3H2 (g) + N2(g) 2NH3(g) vii) Fe2O3 + Al Al2O3+2Fe 8 For more free DOWNLOADS, visit www.aspirationsinstitute.com  in labs? Practice Based MCQ’s 1. When aqueous solution of sodium sulphate and barium chloride are mixed together, it becomes- a) turns red b) forms a white precipitate c) forms yellow precipitate d) becomes colourless 2. The colour of ferrous sulphate crystal is- a) yellow b) light green c) red d) brown 3. A student took solid quick lime in a china dish and added a small amount of water to it. He would hear- a) pop sound b) a crackling sound c) hissing sound d) no sound at all 4. When an iron nail is placed in copper sulphate solution the observation are as follow- a) The solution turns light green b) A brown deposit is formed on the nail c) Born ‘a’ and ‘b’ d) None of the above Answer 1. (b) 2. (b) 3. (c) 4. (c) 9 For more free DOWNLOADS, visit www.aspirationsinstitute.com  3 two s (c)c Chemical reaction showing change in temp. F Give equation and identify the type of reaction. 9. 10. 11. 10 For more free DOWNLOADS, visit www.aspirationsinstitute.com 12. Silver 13. 14. 15. 11 For more free DOWNLOADS, visit www.aspirationsinstitute.com Q.16 When potassium Iodide solution is added to a solution of lead nitrate in test tube, a precipitate is formed. i) State the colour precipitate ii) Name the compound precipitated iii) Write balanced equation for chemical reaction (CBSE-2015 Comptt) Q. 17 Decomposition reactions require energy either in form of heat and light a electricity for breaking down of reactions. Write one equation for each type of decomposition reaction where heat, light or electricity is used as form of energy. Q. 18 2 gm of silver chloride is taken in china dish, and china dish is placed in sunlight for sometime. What will be your observation. Write the balanced chemical equation for above reaction and identify the type of reaction. (CBSE-2019) Q.19 Identify the type of reactions taking place in each of following cases and write the balanced chemical equation for the reactions. a) Zn reacts with silver nitrate to produce zinc nitrate and silver. b) Potassium iodine reacts with lead nitrate to produce potassium nitrate and lead iodide (CBSE-2019) 12 For more free DOWNLOADS, visit www.aspirationsinstitute.com 2. Barium Sodium HINTS TO LONG ANSWER TYPE QUESTION 2. 13 For more free DOWNLOADS, visit www.aspirationsinstitute.com