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Question 25: How does Amoeba engulf the food particle?

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Answer: Amoeba engulfs the food particle by forming finger-like projections around it, which are known as pseudopodia.
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6. 7. Recognition and Identification of Gas (4) The gas is colourless and has a pungent choking odour. (b) The gas turns moist blue lin paper red. If a tod dipped in ammonia solution is brought near the gas, dense white fumes of ammonium chloride are formed. NH₂taq) + HCT NH₂CL (d) When the gas is passed through silver nitrate solution, a white precipitate of silver chloride is formed. AgNO,(a) HCI HNO, → AgCl + The precipitate dissolves in excess NH₂OH Sulphur dioxide Preparation Add dil. HCI or dil. H.SO, to metallic sulphites. dil. Acid → Salt 2HC1 → 2NaCl H₂SO4 → Na₂SO4 + → Na₂SO₂ + H₂SO₁ Metal Hydrogen sulphite Na SO, Na₂SO 2NaHSO, + + + Recognition and Identification of Gas a) The gas is colles with smell of borping sisiplur. (a suffocating odour). Case A Lid It decolours plus restored potassite 2KM D 8₂0550. tpink e) It chan oranges law solution H₂SO Pb(NO₂)₂ (colourless) (CH₂COO),Pb + H-S (colourless) (ch It also turns lead nitrate solution black H₂S 1 PbS (black) + (b) Burning wooder plexingarhed in sulphur dioxide. (c) it turns moist band and finally bleaches it. This bleaching is temporary. LidTums bin ichid ail) Similar to carbon dioxide). (1) It has no ellert on lead acetate paper. Hydrogen sulphide Preparation Add dil. HCl or dil. H₂SO4 to metallic sulphides like ZnS, FeS, etc. Metal sulphide + Salt + Hydrogen sulphide dil. Acid → H₂SO4 FeSO4 + FeS ZnS + + 2HCI ZnCl₂ + Recognition and Identification of Gas (a) The gas is colourless with a foul smell as of rotten eggs. (b) It turns moist blue litmus red. Lic) It turns lead acetate paper black. Water H₂O H₂O 2H₂O PbS (black) H₂ST H₂S T + 2CH₂COOH + of sulphur dioxide. AHSO), (soluble) permanganate solution. SO₂ + 2MnSO₂ + 2H₂SO4 acidified potassium dichromate green. 350₂ → Cr₂(SO₂); + K₂SO4 + (green) + Sulphur dioxide SO, T SO, T 250 H₂O 2HNO3 Note: H₂S also turns acidified potassium permanganate from pink to colourless and acidified potassium dichromate from orange to green but as yellow sulphur is also present the solution is not clear. 138 8. 9. Ammonia Preparation: Add alkall to ammonium salt like ammonium chloride or ammonium sulphate. Ammonium salt + 2NH₂CI NHƯ + 10. Alkali Ca(OH)₂ NaOH → Salt + Water CaCl₂ + 211₂0 + NaC1 + H1₂O Recognition and Identification of Gas (a) The gas is colourless with a characteristic sharp, pungent smell. CoCl2 (blue) Librit turns moist red litmus blue. If a rod dipped in cone HCI is brought near the gas, dente white fumes of ammonium chloride se formed, The gas turns colourless Nesslers reagent, Le (K,Hg) potassium mercuric iodide, brown. (e) On passing the gas through a solution of copper sulphate, pale blue precipitate is formed on ping excess ammonia this precipitate dissolves to form a dark blue solution. Water vapour Preparation: Heat a crystalline substance like hydrated sodium carbonate or hydrated copper sulphate. Hydrated salt A Anhydrous salt+ Water vapour Na₂CO, 10H₂O, Na₂CO3 CuSO4.5H₂O (blue) CUSOA + (white) + Ammonia (d) It turns blue cobalt chloride paper pink.. + 2H₂0 1 2NH, T NH, 1 10H₂0 SH₂O Recognition and Identification of Gas La) Colourless and odourless vapours condense to form a clear liquid on the cooler part of the test-tube. (b) The liquid is neutral to litmus. (e) This liquid turns anhydrous copper sulphate from white to blue. SH₂0 -> CUSO, SH.O CuSO (white) (blue) CoCl₂ 2H₂O (pink) Nitrogen dioxide Preparation: Heat a heavy metal nitrate like copper nitrate or lead nitrate. A Metal oxide + Oxygen + Nitrogen dioxide Metal nitrate 2Cu(NO3)2 2CUO + 0₂ + 4NO₂ T 2Pb(NO3)2 A 2PbO + 0₂ + 4NO₂ 1 Note: Sodium nitrate and potassium nitrate do not produce nitrogen dioxide when they are heated, Recognition and Identification of Gas af The gas is brown in colour, has an irritating (pungent) odour and is non-combustible. (b) It turns moist blue litmus paper red. e) It liberates iodine (violet vapours) from potassium iodie (Kl) solution or turns potassium iodide papes brown. 2K1 1₂21 2KNO₂ 2NO₂ + (dy ft turns green acidified ferrous sulphate solution brown. 139
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Question Text
Question 25: How does Amoeba engulf the food particle?
Updated OnApr 10, 2022
TopicLife Processes
SubjectScience
ClassClass 10
Answer TypeText solution:1 Video solution: 1
Upvotes159
Avg. Video Duration3 min