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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Chip becomes stale and unfit for consumption if they are kept open for long. name the phenomenon. how can it be prevented |
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Answer» Answer: Explanation: Potato chips made in oil and FATS get RANCID quickly. To prevent such a CIRCUMSTANCE they can be FLUSHED with nitrogen gas st the time of packaging or keeping it in airtight CONTAINERS. Also antioxidantslifeke BHA can also be used. |
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| 2. |
Show that the S.I unit of coefficient of viscosity is 10 times of its C.G.S unit |
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Answer» This shows that S.I UNITS of coefficient of viscosity is 10 times of it's C.G.S units. |
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| 3. |
Useful and harmful chemical reaction |
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Answer» Useful Chemical Reactions Are :- Chemical reactions are used to PRODUCE most of our energy. ... The oxygen in air is a very reactive chemical and is important in many chemical reactions such as combustion, rusting and the reactions by which we get energy from the food we eat. Harmful Chemical Reactions Are :- The top 10 most dangerous chemical reactions |
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| 4. |
Temperature remains the same during the state change.give reason |
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Answer» Answer: It is because of the LATENT heat. Explanation: The latent heat or the EXTRA heat energy which remains HIDDEN is utilised to create or destroy the INTERMOLECULAR force of attraction. |
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| 5. |
Answer with detailed explanation... plzzz My XAM 2morrow!!! 15 POINTS !!! NONSENSE ANSWER DIRECT report!!! I will 100% follow you and mark as brainliest... |
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Answer»
hey DEAR your answer is option 3 explanation the bond dipole moment tells us the POLARITY present in the bond which is decided by electronegativity of the atom dipole moments ARISE from differences in electronegativity. The larger the difference in electronegativity, the larger the dipole moment. The distance between the charge separation is also a deciding factor into the size of the dipole moment. The dipole moment is a MEASURE of the polarity of the molecule. hope it helps u mark me brainliest ONE plzzzz |
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| 6. |
"Electron affinity of Cl is the highest among the halogens -yet, F is the strongest oxidizing agent". Why? |
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Answer» Answer: because fluorine has highest ELECTRO negativity Explanation: |
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| 7. |
Which of the following compounds corresponds vant's hoff factor 'i' to be equal to 2 for dilute solution??a) MgSO4 b) sugarc) NaHSO4d) K2SO4 |
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Answer» Answer:a) MGS04 Explanation: MgS04 on DISSOCIATION gives Mg^+2 and S04^-2 . HENCE the value of vant hoff FACTOR (i) is equal to 2. |
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| 8. |
Essay on chemical reactions |
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Answer» Answer: => Chemical reactions are the heart of chemistry. People have always known that they exist.The Ancient Greeks were the firsts to speculate on the composition of matter. They thought that it was possible that INDIVIDUAL particles made up matter.And Later, in the Seventeenth Century, a German chemist named Georg Ernst Stahl was the FIRST to POSTULATE on chemical reaction, specifically, COMBUSTION. He SAID that a substance called phlogiston escaped into the air from all substances during combustion.Thanks ☺️ ❤️✌️ |
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| 9. |
What are significant figures? |
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Answer» Explanation: the uncertainty no. are called SIGNIFICANT FIGURE . PLEASE follow me |
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| 10. |
What is chemical reaction |
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Answer» It is a PROCESS in which one or more substances ,the REACTANTS,are CONVERTED to one or more different substances ,the products |
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| 11. |
Please answer these question |
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Answer» Q8 Co2 cut the supply of oxygen and if oxygen is not supplied then the flame got EXTINGUISHED |
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| 13. |
What is reverse osmosis |
Answer» Reverse osmosis (RO) is a water purification process that uses a partially permeable MEMBRANE to REMOVE ions, unwanted molecules and LARGER particles from drinking water. ... Applying an external PRESSURE to reverse the natural flow of pure solvent, thus, is reverse osmosis. |
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| 14. |
ECExercisesA. Tick the most appropriate answer.1. Attractive forces that hold atoms or ions together to form molecules or compounds are calleda. ionic bonds.b. covalent bonds. C. chemical bonds.d. none of thesedion called |
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Answer» Answer: answer |
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| 15. |
जल तथा ऐल्कोहॉल के निश्चित आयतन को मिश्रित करने पर मिश्रण का आयतन प्रारम्भ में लिए गये जल तथाऐल्कोहॉल के आयतनों के योग से कम हो जाता है, क्यों? |
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| 16. |
Figures. That is, 37.7.5. Following data was obtained for concentration of iron in a water sample. 11.2, 116, 110, 111ppm. Predict whether the result 11.6 be rejected using Q-test, 2.5d rule and 4d rule. The 90%- value for 4 observations is 0.765Solution: |
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Answer» Answer: 110 hshdufisiiaidiguvuycushsuduv |
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| 17. |
(vi)Cusoy 5H20CuSO4+5H20Kc expression of the above equation? |
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Answer» Explanation: For the GIVEN chemical equation: The expression of for above equation follows: Equilibrium constant in terms of ... The Equilibrium Constant For The REACTION As Written Is K =([CuSO4][H2O]5) / [ CuSO4 . 5H2O] .. 6 The EXPRESSIONS of |
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| 18. |
Pick out the odd one and give reasons for the following.Calcium oxide, Calcium chloride, Phosphorus pentoxide, Potassium hydroxide. |
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| 19. |
Which has the maximum number of molecules among the following?(a) 44g of CO2(b) 44g of O2(c) 8g of H2(d) 64g of SO2iska answer (b) h but plz koi bta do kese iska answer b h?? |
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| 20. |
Consider the following reaction: FeCl3(aq) + NaOH(aq) → Fe(OH)3(s) + NaCl(aq)a- Balance this equation.b- 20 g of FeCl3 were added to 12 g of NaOH. Calculate the obtained mass of each of the products. |
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Answer» fecl3+3Naoh$$$$ fe(OH)3 + 3 NACL Explanation: 20 gm if fe(oh)3 and 12 gm of nacl |
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| 21. |
What are the products formed when an aqueous solution of Calcium bicarbonate is boiled.O CaCO3 + H2O + CO2O Ca(HCO3)2 + H2OO Ca(OH)2 +H2OO Ca + CO2 + H2O |
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Answer» Explanation: LIKE and follo |
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| 22. |
Consider the following reaction:2Fe2O3 + 3C → 4Fe + 3CO2120 g of were added to 7.2 g of carbon.a- Tell whether if the mixture is stoichiometric or not. If the mixture is not stoichiometric, specify the limiting reagent and that in excess.b- Calculate the mass of Fe formed.c- Calculate the number of mol of CO2 obtained.d- Determine the remaining mass of the reagent in excess. |
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Answer» ejeueyrydydhdjdjdjdndbdvdvd |
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| 23. |
(vii) Calculate the quantity of electricity required to deposit 0.2 mol of sodium metal duringelectrolysis of fused sodium chloride. |
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Answer» Explanation: The quantity of electricity required to deposit 1.15 g of sodium from molten NaCl (NA = 23, Cl = 35.5) is : Top answer · 1 vote Mass of Na is divided with its atomic mass to obtain NUMBER of moles.Number of moles of Na = 1.1523 = 0.05 moles. Na^ + + e^ - → Na THUS, |
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| 24. |
The products obtained by the reaction between acid and base areA) saltB) waterC) sulphur |
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| 25. |
Varterprises Town Hall Conde Tumkur Mob: 9741894963PART-By Seves of the following questions. Each question carries 10 marie710Deline jonization energy. How does it vary along a period and dethe group? ExplainCalculate the bond order of the following: 02, 0; and 05State Pajan's rules. |
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Answer» ysisgskbskavsidvejsgeowbekevistsisuakdgeubsvskvsusse |
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| 26. |
In N3H, oxidation number of N atoms are :-O -1,0,0O -1/3,-1/3,-1/3O -3, -3, -3O -1,-1,0 |
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Answer» OXIDATION number of H atom = +1 oxidation number of N atom = x sum of oxidation number of all ATOMS = 0 oxidation number of H + 3 × oxidation number of N = 0 1 + 3x = 0 x = - 1/3 |
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| 27. |
2. Identify A, B, C in the following:CH3-CH=CH2 Bry/CC14 AR.TZnСB dil AlkaliKMnO4What ro S |
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Answer» मैं खेतों में काम करता हूं तभी मेरे परिवारों को खाना मिलता है फसल अच्छी हो तो कोई चिंता नहीं होती मगर जब किसी आपदा के कारण मेरी फसल निष्फल हो जाती है तब मेरे साथ साथ मेरा परिवार भी मुश्किलों में पड़ जाता है मुझे बहुत ही भारी नुकसान का सामना करना पड़ता है जिसमें मेरा परिवार भी शामिल होता है वह मेरे हर सुख-दुख में हर ...so pls respect kisaan AGAR kisaan hein to HAM hein mark me as brainliest ONE |
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| 28. |
Diamond is very hard due to its ____________ structure.a) Hexagonal layeredb) Tetragonal three dimensionalc) Tetragonal layeredd) Hexagonal two dimensional |
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Answer» B) TETRAGONAL THREE dimensional Explanation: |
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| 29. |
What is photosynthesis?------------------------------------------I'm getting bored -_- |
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Answer» ᯽ANSWER:-} Photosynthesis, the process by which green PLANTS and certain other ORGANISMS transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and USED to convert water, CARBON dioxide, and minerals into oxygen and energy-rich organic compounds. hσpє ít'ѕ hєlp. чσu |
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| 30. |
Which of the following titration is not performed practically(a) NH4OH versus HCI(b) NaOH wexsus HCl(c)NH4OH versus CH3COOH (d)NaOH versus CH3COOH |
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Answer» Follow i N s t a G r a m = niral161 Explanation: → Mark as brainliest answer. → (c)NH4OH versus CH3COOH → Because it is to dangerous. |
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| 31. |
Baby ko si kulotInaalis niya akong lungkotSa mga ngiti mo ako’y parang hinihigopHindi ko na talaga to kaya na malimotBaby ko si kulotPag-ibig mo’y pilit kong inaabotSana ako na lang ang makasambotDasal ko kay bathala wag mo tong ipagdamot |
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Answer» Answer: Ooh, YUN lang, Pinakawalan mo BA ang iyong sanggol? SIGE Magandang ARAW sa hinaharap. |
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| 32. |
Which pair of substances produce a precipitate when their aqueous solutions are mixed?A) sodium chloride and barium nitrate B) sodium nitrate and barium chloride C) sodium nitrate and silver nitrate D) sodium sulphate and barium chloride |
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Answer» Answer: TAKING DATA and instructions from a USER, processing the data as PER instructions, and DISPLAYING or storing the processed data, are the four major functions of a computer. These functions are also known as the input function, process function, output function, and storage function, respectively. |
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| 33. |
Which substance reacts with water to form a soluble compound and an insoluble gas?A) ammonium sulphate B) caesium C) calcium carbonate D) copper |
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Answer» Answer: mera 15.5 I CH ka hai KOUN INTERESTED hai to aaao |
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| 34. |
When metals and nonmetals are oxidised by hot and concentrated sulfuric acid, it gets reduced towhich gas? |
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Answer» Follow i n s t a g r a m = niral161 Explanation: → MARK as brainliest answer. → METALS and nonmetals both are oxidized by hot, concentrated sulfuric acid which itself GETS reduced to SO2. → sulfur dioxide. |
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| 35. |
In which reaction do the products formed not include a salt?A) calcium(II) carbonate with hydrochloric acid.B) copper(II) oxide with hydrogen.C) copper(II) oxide with sulfuric acid.D) copper(II) sulfate with sodium hydroxide. |
Answer» answer is D |
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| 36. |
Which of the following compound can show metamerismO CH3-CH2-O-CH3CH, CHICH, CH, CH0IICH, COCH,OchoCH, C 0 C H |
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| 37. |
Given thatB= h/8π²ICD=h³/32π⁴I²r²KCK=4π²ω²C²μproof that, D=4B³/ω²I challenge you my fellow Chemistry Students |
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Answer» djdndkjdbdkdbejvrkdbdkdbdhd OK |
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| 38. |
I.U.P.A.C name of compound is :CH-CH-CH-CH=CH-C-OHIICHOOO 4-Formylhex-2-enoic acidO 4-oxohex-2-enoic acidO 4-Carboxy butenalO 4-Ethyl-5-oxopent-2-enoic acid |
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Answer» c Explanation: because , four carbon CHAIN are present it means butenal oh is ALCOHOL |
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| 39. |
Salts are made by reacting acids with bases.For which combination of acids and bases is the titration method of preparation suitable?A) an insoluble acid with an insoluble baseB) an insoluble acid with a soluble baseC) a soluble acid with an insoluble baseD) a soluble acid with a soluble base |
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Answer» CARPEDIAM |
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| 40. |
Which salts are soluble in water?1) ammonium carbonate, (NH4)2CO32) calcium carbonate, CaCO3 3) lead(II) carbonate, PbCO34) sodium carbonate, Na2CO3A 1 only. B 1 and 2. C 1 and 4. D 2 and 3 |
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Answer» ANSWER: c) 1 and 4 Explanation: From solubility rules: All CARBONATE salts are INSOLUBLE in WATER EXCEPT those of sodiu, ammonia and potassium. |
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| 41. |
Stability of carbanion follows the order.CH(P)(Q) (R)(S)O Q>P>S>RQ>P>R>SOP>>R>SOP>>S>R |
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| 42. |
HPd-BaSO.CH=C=CACHH>A>BNaLiq NH,Which statement is correct :-O A & B :-cis-2-ButeneO A & B :- 11-butaneA & B are geometrical isomer of each otherO Ais more stable than B |
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Answer» Answer: Answer: Answer: Width of rectangle is 25 cm. Step-by-step explanation: Given :- A wire bend in form of square of side 30 cm. Then wire is again bend in form of rectangle of length 35 cm. To find :- Width of the rectangle. Solution :- Here, Concept is : If we are bending wire in form of square than again bending it in rectangle. Than, perimeter of square will EQUAL to perimeter of rectangle because we are not increasing length of wire by one measure we are bending it in square and rectangular shape. So, Perimeter of square = 4 × side ⟶ Perimeter = 4 × 30 ⟶ Perimeter = 120 Thus, Perimeter of square is 120 cm. According to concept, Perimeter of square and perimeter of rectangle are equal. So, Perimeter of rectangle is 120 cm. Let, Breadth or width or rectangle be x cm. We know, Perimeter of rectangle = 2(Length + Breadth) ⟶ 120 = 2×(35 + x) ⟶ 120 = 70 + 2x \⟶ 120 - 70 = 2x ⟶ 50 = 2x ⟶ 50/2 = x ⟶ x = 25 We TAKE, Width of rectangle be x. Therefore, Width of rectangle is 25 cm. |
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| 43. |
Red hotHC=CH-Fe tube>(A)CHCIAICI,(B)|кмрон"Which of the following product is not formed during the whole above reaction ?CH,COOHCHO |
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Answer» I don't KNOW |
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| 44. |
64. A hydrocarbon with formula C8H18gives onemonobromo derivatives. The hydrocarbon isa) n-octaneb) 2-methyl heptanec) 2, 2, 4-trimethyl pentaned) 2, 2, 3, 3-tetramethyl butane |
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Answer» A hydrocarbon with formula C8H18 gives ONE. monobromo DERIVATIVES. The hydrocarbon is. a) n-octane. |
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| 45. |
Which metal has a soluble carbonate, chloride and sulfate?A barium B calcium C copper D potassium |
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Answer» Barium is the answer. |
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| 46. |
Valency and ____ of an element are related to each other.1)molar mass2) atomic masd3) electronic configuration4) molecular mass |
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Answer» OPTION no.3 is RIGHT ELECTRONIC CONFIGURATION |
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| 47. |
Which substance would not be used for preparing a pure sample of crystalline magnesiumsulfate by reaction with dilute sulfuric acid? A magnesium carbonate B magnesium hydroxide C magnesium nitrate D magnesium oxide |
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Answer» (B) magnesium hydroxide is the answer Explanation: hope u UNDERSTAND |
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| 48. |
Which acid and base react together to produce an insoluble salt?A hydrochloric acid and sodium hydroxide B nitric acid and calcium oxide C sulfuric acid and barium hydroxide D sulfuric acid and zinc oxide |
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Answer» Answer: A) is the answer Because HYDROCHLORIDE ACID is a acid and SODIUM hydroxide is a BASE.. Whereas others are either acid or base |
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| 49. |
Arideses d)DisaccharideTeflon is chemically inert, due to presence ofa) C-F bondb)C-H bondof following carbonyl compounds undergoes colfc)H bondC = C bon |
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Answer» Explanation: its most general form, algebra is the STUDY of MATHEMATICAL symbols and the rules for manipulating these symbols; it is a UNIFYING thread of almost all of mathematics. It includes EVERYTHING from elementary equation solving to the study of abstractions such as groups, rings, and fields Hope it's helps.. |
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| 50. |
5. (a)(a) Calculate the enthalpy Change for thereaction :H2(g) + 12(g) → 2HI(g)Given that bond energies of H - H,I - I and H - I are 433, 151 and299 kJ mol-1 |
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Answer» I am SORRY |
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