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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. |
Carry out conversion of ethanamine to ethane |
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Answer» Answer: At a temperature of 0 to 5 degree celsius,ethyl amine reacts with a NITROUS acid(obtained from NaNO2solution and dilute HCL),to give ethyl diazonium chloride.This can be given a little HEAT in a aqueous medium to give ethanol. NaNO2 + HCl gives HNO2 + NaCl. C2H5NH2 + HNO2 gives C2H5N2+Cl- . C2H5N2+Cl- + H2O + Heat gives C2H5OH + N2 + HCl. hope its HELP you |
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| 2. |
Derive the structure 4- hydroxyheptanal |
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Answer» Answer: 4-hydroxyheptanal SCHEMBL6138531 |
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| 3. |
Write the expression for the equilibrium constant Kc for the following reaction: 4 NO(g) + 6H2O (g) ↔ 4 NH3 (g) + 5 O2 (g) |
Answer» Law of Mass Action :
Law of Chemical Equilibrium :For the reaction, Equilibrium constant is given by Where KC is called equilibrium constant at constant temperature. For the given chemical reaction, Additional Information :
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| 4. |
Ig of dihydrogen gas and 1 g ofof dioxygen gas reacts by the reaction 2H₂ (g) O2(g) → 2H2O( Are there any one limitingreagent?which one is limiting reagent( whatmass of water will be formed afterchemical reaction. |
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Answer» Answer: |
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| 5. |
Can water behave as acidic and basic |
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Answer» no WATER is nutral I THINK so ?.... PLEASE MAKE me BRAINLIEST please |
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| 7. |
what are different types of chemical reactions? Explain displacement reaction and combination reaction With examples.. Don't need google answers |
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Answer» ... see DISPLACEMENT--- AB+C-----A+BC combination-----A+B-------AB I HOPE you are getting it :) |
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| 8. |
A compound contains 92.3% carbon and rest hydrogen [3]Its molecular mass is 78. Calculate its molecular formula.( C=12, H=1 ) |
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Answer» Here's your answer my FRIEND |
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| 9. |
What is called metals |
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Answer» Answer: metal is GOOD CONDUCTOR of HEAT and electricity metal is malleable metal is ductile metal are SONOROUS |
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| 10. |
Conversion of primary amine into secondary amine |
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Answer» To preserve the nucleophilicity of amino compounds during conjugative radioiodination, a new METHOD for converting primary amines to PHENOLIC secondary amines was developed. ... The irreversible attachment of formylphenol to the amino GROUP was accomplished by reduction of the imine with sodium cyanoborohydride. |
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| 11. |
5. In a reaction 4.6g of barium chloride reacts with 3.4g of sodium sulphate. The products were2.8g of sodium chloride and 5.2 g of barium sulphate. The reaction takes place as follows.Barium chloride + Sodium sulphate → Barium sulphate + Sodium chloride.Show that the above observation is in agreement with the law of conservation of mass. State thelaw. |
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Answer» Answer: 4.6+3.4=2.8+5.3 (Barium chloride + Sodium sulphate → Barium sulphate + Sodium chloride) EXPLANATION: Law of CONSERVATION of MASS in a chemical REACTION the mass of REACTANTS and products remains conserved
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| 12. |
calculate averaga molecular mass of ozone .20% of it decomposes to oxygen. Also calculate the vapour density of mixture. |
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Answer» Answer: Explanation: MOL MASS of mixture =2×38.3=76.6 No. of MOLES in 100 G of mixture = 76.6 100
LET a g of NO 2 is present in mixture. MolesofNO 2 +MolesofN 2 O 4 =Molesofmixture 46 a + 92 100−a = 76.6 100 "or" a=20.10g Moles of NO 2 in mixture = 46 20.10 =0.437 |
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| 13. |
Reactions which takes place in seconds are |
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Answer» The TERM fast REACTION is BEST applied to reactions that cannot be followed kinetically by conventional methods. It is not sufficient to SAY that a reaction with a large rate constant is a fast reaction, since this term is temperature dependent. |
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| 14. |
Homogenous mixture is formed by mixinga) phenol and waterb) iron filing and sandc) silver chloride and water d) ethanol and water |
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Answer» d) ETHANOL and water Explanation: |
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| 15. |
While typing, keep your elbows at.................. *Left angleRight angleStraightCurved |
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Answer» RIGHT angle Explanation: PLEASE MARK me as BRAINLIEST |
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| 16. |
Which of the following contains maximum no. of molecules1g co2 1g n21g h21g ch4explain |
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Answer» Answer: H2 contains maxim7no of molecules Explanation: no of molecules = 6.022*10^23 / MOLECULAR MASS the molecular mass of H2 is HIGHEST that is 44g therefore it has MAX no of molecules |
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| 17. |
Which fluorine has less electron Affinity than cholrine |
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Answer» Fluorine, which is higher up the GROUP then chlorine, has a LOWER electron affinity. This is because the electrons in the outermost SHELL of a fluorine atom are closer together. ... ENERGY is required to keep the GAINED electron in the shell, causing fluorine to have a smaller electron affinity than chlorine. |
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| 18. |
The electronic configuration of three elements are given below.Which two elements will combine to form an ionic compound? X - 2 8 2, Y - 2 8 6, Z - 2 8 1 |
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| 19. |
______ device is fit in robots...☑️if you don't know so please don't answer ☑️❎Don't spam then I will report ❎ |
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Answer» Answer: Explanation: Robotic sensors device is fit in robots. Robotic sensors are used to estimate a ROBOT's CONDITION and environment. These signals are passed to a controller to enable appropriate behavior.Sensors in robots are based on the functions of human SENSORY organs. Robots require extensive INFORMATION about their environment in ORDER to function effectively. . Okay |
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| 20. |
Classify the following activities into physical health |
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Answer» sino pumatay kay white si red o si black Direction: Classify the following pictures, whether it is an example of RHIP(Reliable Health information and PRODUCTS) or UHIP (Unreliable Healthinfor … d. wish C, objective TIL c. goal setting 13. What is referred to as a future plan or desired results that a person achieve in a specific TIMELINE? a, … anong TIME signature ng waiting batang magalang |
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| 21. |
Write about cross aldol condensation? ( for having 4 marks) |
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Answer» Answer: A crossed ALDOL condensation uses TWO different aldehyde and/or ketone reactants. Such reactions usually give a mixture of MULTIPLE condensation products, because there are two or more possible enolate NUCLEOPHILES, and two different carbonyl electrophiles. Explanation: hope this helps |
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| 22. |
Hey guys his account got deleted.... need ur help to revive his account.... please talk with any moderator u knowhe always tries to support us now it's time to support him |
Answer» ANSWER:THX FOR FREE POINTSExplanation:PLEASE FOLLOW MEMARK AS BRIAN LIST |
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| 23. |
Presipitaion reactions are |
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Answer» A precipitation reaction refers to the formation of an insoluble salt when two SOLUTIONS containing soluble SALTS are combined. The insoluble salt that falls out of solution is known as the PRECIPITATE, hence the reaction's name. Precipitation reactions can HELP determine the presence of various ions in solution. |
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| 24. |
17. Calculate the number of atoms in 0.75 mole atoms of Nitrogen?8. Calculate the wavelength of a 93 g particle moving with a velocity of110 ms - ? |
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Answer» Explanation: n Triangle,AB=AC, AD PERPENDICULAR to BC. PROVE AD bisect angle A and side BC |
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| 25. |
फ्रूट बास्केट स्पिल्ड 45678 के 90% बनानास 95927 फसल पाइनएप्पल एंड 19% ग्रोथ रेट आफ सर्किल ग्राफ चार्ट फॉर द डाटा प्रोवाइडेड |
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| 26. |
Compair chemical properties of metals ahd non-metals |
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Answer» Metals.... They are Shiny. They are Lustrous They are malleable. They are sonorous. They are ductile I.e. can be stretched into wires They have high BOILING and melting point They are good conductor of heat and ELECTRICITY Non Metal... The are DULL. They are non. Lustrous . They are non sonorous They have low boiling and melting point They are bad conductor of heat and electricity except graphite.. |
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| 27. |
The atom of an element A has three electrons in the outermost shell. Itloses one of these to the atom of another element B. What will be the nature and value of charge on the ion which results from A? |
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Answer» Answer: An atom of an element A has three electron in its outer SHELL and B has six electron in outermost shell. The formula of the COMPOUND FORMED between these two will be. Solution : In this CASE the valence electron in the atom A is three and hence its generally 3. |
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| 28. |
................. is used in electric cooker as a resistor |
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Answer» Explanation: NICHROME wire used in heating element is the RESISTANCE in all electric stoves. It is coiled element of the wire, with current CAPACITY as per wattage required. ... In some very modern stoves there are top of stove POWER coupling coils that use the metal of the pan directly. |
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| 29. |
Which of the following pairs do not form a dativecovalent bond to each other?A. NH3 and H+B. H2O and H+C. NHz and BF D. CH4 and AlCl315. |
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| 30. |
There was some repairing work going on in Varun's house. He saw a man pouring a bag of white powder in a drum containing water. He wanted to know that what the man was doing. So, he went near the drum and as soon as he was going to touch it.His brother Arun stopped him to touch the drum and told him that drum would be hot.a) What would be that white powder ?b) Write the reaction occurring in the drum.c) What is the value shown by Arun ? |
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Answer» Answer: a) sorry don't know because in PASSAGE there know any information about this question b)that is also is not given c)CARING of varun plz follow me HOPE it is helpful for you |
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| 31. |
What is the maximum number of electrons can accommodate in 3s and 3p orbital |
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Answer» effiifbhfkyf ffkyf hdkuf HC gkxkkc dkyc |
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| 32. |
an element x gains one electron and complete its octet the electronic configuration and the group of element x is..................... |
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Answer» Answer: X is GROUP 17 element; ns2np7 Explanation:Gr.17 element X will take ONE electron to COMPLETE its octet |
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| 33. |
What happen when ethyl alcohol reacts with red phosphorous and bromine |
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Answer» Answer: The phosphorus first REACTS with the BROMINE or iodine to GIVE the phosphorus(III) halide. These then react with the ALCOHOL to give the corresponding halogenoalkane which can be DISTILLED off. Explanation: |
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| 34. |
Match the following. (1½)Column (A) Column (B)(i) iodine and water (a) Centrifugation(ii) Chalk and water (b) Sublimation(iii) Cream from milk 0 (c) Fractional distillation(iv) Oil and water (d) Separating funnel(v) Salt from seawater (e) Chromatography(vi) drugs from blood (f) Evaporation |
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| 35. |
प्रथम कोटि की अभिक्रिया 15 मिनट में 90% पूर्ण हो जाती है तो इस अभिक्रिया के लिए अर्ध आयु काल की गणना कीजिए |
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| 36. |
Hydrogen forms a divalent cation corret the satment |
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| 37. |
31.36 Chlorine is prepared in the laboratory by treating manganese dioxide (MnO) withaqueous hydrochloric acid according to the reaction4 HCI (aq) + MnO, (s) → 2H,O (1) + MnCl,(aq) + Cl, (g)How many grams of HCl react with 5.0 g of manganese dioxide? |
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Answer» I don't know Explanation: |
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| 38. |
in a given reaction , barium hydroxide reacts with ammonium chloride to form products x and y . identify x and y (a)BaCl2 and NH4OH (b) BaCl2 and H2O (c) NH2 and H2O (d) BaCl2 and NH3 |
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Answer» Explanation: 1. BaCl2 + 2 NH4OH → BA(OH)2 + 2 NH4CL 2. BaCl2 + H2O → BaO+ 2 HCl 3. NH2 + H2O → NH3 + OH 4. BaCl2 + 2NH3 + 2H2O → Ba(OH)2 + 2NH4Cl |
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| 39. |
Groups are the.... while the rows of the periodic are called |
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Answer» period Explanation: ☺️☺️ |
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| 40. |
90/-प्रचमफीनिफियामिनट में15गुणीघस जातीमाभिक्रियालिए भीमालकालफीगणनातोके |
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Answer» Answer: an TRIANGLE,AB=AC, AD PERPENDICULAR to BC. Prove AD bisect angle A and SIDE BC Explanation: n Triangle,AB=AC, AD perpendicular to Bc. Prove AD bisect angle A and side BCn Triangle,AB=AC, AD perpendicular to Bc. Prove AD bisect angle A and side BCn Triangle,AB=AC, AD perpendicular to Bc. Prove AD bisect angle A and side BC |
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| 41. |
Benzene is nonpolar. |
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Answer» BENZENE is nonpolar because it is a SYMMETRICAL molecule in which all the BOND dipoles cancel. Explanation: PLEASE do follow me. |
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| 43. |
Applications of heat |
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Answer» |
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| 44. |
Ek prathmDOL केचुणीकोटी फीकीसिमियाहो जातीखिलिएरतोमिनट15मभिक्रियागणनाउकाल |
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Answer» आपका प्रश्न गलत है। Explanation: मुझे लगता है कि यह प्रश्न आपने BRAINLY SCANNERS से SCAN किया है। और अच्छे से स्कैन नहीं होने के कारण आपका प्रश्न गलत दिखा रहा है। धन्यवाद!कृपया मेरे उत्तर को BRAINLIEST answer कर दे। |
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| 46. |
How will you convert haloalkane into alkane |
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Answer» Answer: Grignard reagents react rapidly with acidic HYDROGEN ATOMS in molecules such as alcohols and water. When a Grignard REAGENT reacts with water, a proton REPLACES the halogen, and the product is an alkane. The Grignard reagent therefore provides a pathway for converting a haloalkane to an alkane in two steps. Explanation: |
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| 47. |
Take 3 examples from your surroundings and give explanation based on Newton'slaw of motion. |
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Answer» QUESTION Take 3 examples from your surroundings and give explanation based on Newton's law of MOTION. ANSWER 1) Newton’s law of motion: Explanation with examples According to the first law: If an OBJECT is at rest/uniform motion, it will continue to remain in rest/motion unless an external unbalanced force act on it. Example 1: Pushing a big rock, the rock will stay in place until you push it. Example 2: When a rocket goes up in space, there is almost a perfect amount of earth gravity for the ship to not come crashing down. Example 3: When we shot the bullet in a space, it would travel in a straight LINE until it reaches the gravity of another planet. 2) Newton’s law of motion: Explanation with examples According to 2nd law: The force is directly proportional to the rate of change of momentum. Example 1: If a truck and bicycle did a short race at the same speed, then bicycle will win the race. Example 2: For a long race truck will win the race because F=ma and a(acceleration) is more. Example 3: If a DOG is pulling a rock then acceleration is fully dependent on the force of dog because the MASS of rock will not change. 3) Newton’s law of motion: Explanation with examples According to the 3rd law of motion, for every action, there is an equal and opposite reaction. Example 1: When we push the floor, the floor pushes back. Example 2: Cars wheel produce friction trying to push and ground exerts an opposite force to push it. Example 3: Rockets use fuel to push on ground, which lifts them up. Rockets also rely on friction with air so that the fuel still works. HOPE IT HELPS YOU FOLLOW ME |
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| 48. |
CaO + CO231. Define Catenation and Tetravalency of Carbon.1 X 10 = 10 M32. What is the Chain Isomerism explain with one example?33. What is the Position Isomerism explain with one example?34. What is the Functional group Isomerism explain with one example?35. Why Ethyl alcohol is not reacting with Base?36. Define Molarity and write the formula and units of Molarity.37. What is Double displacement reaction with one example?38. Define Oxidation reaction with one example.39. Define Normality and write the formula and units of Normality.40. Define Addition reaction with one example.1. Answer the Following (2M)2 X 4 = 8 Mark:41. Explain the Physical and Chemical properties of Ethanol.42. Explain the Concentration terms based on Volume and Weight with their formulae.43. How could you identify whether the compound is Saturated or Unsaturated?44. 10g Sucrose is dissolved in 100g water. Find Wt/Wt %.Answer the Following (3M)3 X4= 12 Mark45. What is Hydrocarbon and write the Classification of Hydrocarbons with an example.46. Explain the Chemical properties of Non-Metals, which reacts with Oxygen, Chlorine and Hydrogentwo examples of each.47. Explain the Chemical properties of Metals.a). Reaction with Waterb). Reaction with Acids48. a). 10 g of NaCl is present in 100ml of solution. Find Wt/Wt %. If density of solution 1.2g/ml.b) Calculate the Molarity / Molar concentration of solution, when 5g of NaOH in 50ml of water.nswer the Following (4M |
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Answer» jdjdhdjdjdjdhdhdhfhdhdjfjfhfjfjf Explanation: |
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| 49. |
Sarpav na samanarthi sabd |
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| 50. |
Match the following.Column (A) Column (B)(i) Alcohol and water (a) Centrifugation(ii) Chalk and water (b) Sublimation(iii) Cream from iodine (c) Fractional distillation(iv) Oil and water (d) Separating funnel(v) Salt from seawater (e) Chromatography(vi) drugs from blood (f) Evaporation |
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Answer» i-c, ii-b, iii-d, iv-a, v-e, vi-f |
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