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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. |
Which ligand is responsible for hardness of water and why |
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Answer» tion:POLYDENTATE ligands, such as the POPULAR HEXADENTATE LIGAND EDTA, bind the undesirable ions in HARD water. |
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| 2. |
In which case is number of molecules of water maximum?[NEET-2018](1) 18 mL of water(2) 0.18 g of water(3) 10-3 mol of water(4) 0.00224 L of water vapours at 1 atm and 273 K |
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Answer» That's why we listen during instructions, not fill the chat window with off TOPIC nonsense I have it. I added comments. The answers are correct but not written USING complete sentences. I don't know if Mr. Collins will REQUIRE you to write them using complete sentences. A QUESTION mark doesn't help me understand your question. Your answers are not written using complete sentences. Mr. Collins may make you re-do it or may deduct points.Hold on, our servers are swamped. Wait for your answer to fully load.Explanation: |
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| 3. |
Concentration of acid solution is neutralized by which place |
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Answer» concentration of an ACID SOLUTION is NEUTRALIZED by same amount of base solution |
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| 4. |
Compound that is more reactive towards sn1 reaction |
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Answer» 4choropent2ene is more REACTIVE than 1 chloropent2ene.To discuss which is more reactive for SN1,it is suggestable to check the the stability of the FORMED INTERMEDIATE carbocation. 4chloropent2ene's carbocation is more stable than 1chloropent2ene's DUE to inductive effect.I hope it's help u.. |
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| 5. |
Concentration of acid is neutralized by which base |
| Answer» CONCENTRATION of an ACID is NEUTRALIZED by same concentration AMOUNT of acid | |
| 6. |
Compund which directly converted from solid to gas |
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Answer» ammoniaExplanation: |
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| 7. |
The density of 3mol solution of nacl is 1.25g/ml calculate molality if molarity is 3m |
| Answer» MOLALITY of the SOLUTION is 2.65 MOLAL | |
| 8. |
Define the boiling point of a liquid |
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Answer» The BOILING point of a substance is the TEMPERATURE at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor. The boiling point of a liquid VARIES DEPENDING UPON the surrounding environmental pressure. |
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| 9. |
What is colloidal solution and also explain tyndall effect? |
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Answer» The TYNDALL Effect is the effect of light scattering in colloidal DISPERSION, while SHOWING no light in a TRUE solution. This effect is used to determine whether a mixture is a true solution or a colloid. |
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| 10. |
Why is kelvin scale of temperature considered Better than celsius scale? |
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Answer» because it NEVER give negative VALUE ( absolute value )Explanation:In a Kelvin scale the 0th reading I.e, 0K equals -273°C. So temperatures on Kelvin scale can be read from -273°C of Celsius scale. It is always comfortable to read VALUES as POSITIVE numbers than negative ones. |
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| 11. |
Why does water cool the surface of roof ? |
| Answer» WATER aborbs heat ,from the roof or GROUND it has been sprinkled on, and evaporates hence leaving the surface cooler. It is the same reason why earthern pots are often covered with wet CLOTH. So that the wet cloth absorbs the heat and KEEPS the POT cool hence keeping the water inside cool. | |
| 12. |
In a period from left to right basic nature of oxide decreases explain |
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Answer» In a period basic nature of oxide decreases because :On moving left to right non metallic character decreases so since non metallic oxides are ACIDIC in nature , basic character decreases. Hope it HELPS you! PLS mark BRAINLIEST! |
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| 13. |
Chemical reaction of gold nanoparticle with cupric nitrate |
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Answer» the FORMULA of it |
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| 14. |
Chemical reaction of calcium carbonate with water product |
| Answer» CACO3( s ) → CaO( s ) + CO2( g)EXPLANATION:Calcium carbonate will REACT with WATER that is saturated with carbon dioxide to form the soluble calcium bicarbonate. This REACTION is important in the erosion of carbonate rock, forming caverns, and leads to hard water in many regions. | |
| 15. |
Chemical equation for the reduction of ag+ by ethanol |
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Answer» tion:I cannot know the answer please I cannot help to LOSE please help to me and give me thanks THANK you have a nice DAY |
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| 16. |
Chemical reaction of manganese dioxide and hydrogen peroxide |
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Answer» O2=MnO2+ H2O. |
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| 17. |
Chemical reaction in zno using zinc nitrate hexa hydrate and naoh |
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| 18. |
Chemical equation of zinc acetate dihydrate with methanol |
| Answer» TION:znch3coo is CHEMICAL FORMULAE of ZINC ACETATE | |
| 19. |
Calculate the normality of a 0.5 m solution. Na2co3 |
| Answer» TION:SORRY the DIFFICULT question I cannot know the answer PLEASE | |
| 20. |
Cetyl trimethyl ammonium chloride is which type of detergent |
| Answer» | |
| 21. |
Temporary hardness and permanent hardness of water can be removed by adding |
| Answer» WASHING SODA - Na2CO3Hope it will HELP you....... | |
| 22. |
State whether a displacement reaction will occur if copper sulphate and iron are mixed |
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Answer» :-Yes a displacement reaction will occur if copper sulphate and IRON are mixed.As per the REACTIVITY series, we know that, iron is more reactive than copper, Iron will displace copper from it's solution and it will form Iron sulphate.--------------------Reaction :- Iron + Copper sulphate → Iron sulphate + Copper--------------------Chemical equation :- FE + CuSO4 → FeSO4 + CU |
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| 23. |
Guys i cannot understand p pi and d pi bonds...can someone please explain |
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Answer» :Sigma BOND : It is formed by the END to end OVERLAP of orbitals of two atoms which are combining. ... P - Pi p - Pi bond is formed when one p orbital of each combining ATOM is overlapped laterally. P - Pi d - Pi bond is formed when p orbital of one atom and d orbital of ANOTHER atom overlap laterally. |
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| 24. |
Boiling point and freezing point of water in kelvin scale |
| Answer» POINT in KELVIN is 373.15°K and FREEZING point in kelvin is 373.15°K | |
| 25. |
Boiling point explanation in container having pistons |
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Answer» As we all know at normal boiling point, vapor pressure of water is equal to atmospheric pressure. Vapour pressure of water is pressure exerted by its vapor(in dynamic equilibrium with water) on the surface of water.We also know that liquid water doesn't change it's phase untill it reaches 100°C EXCEPT evaporation is always there.So, can I assume that just before it starts boiling (in saturated water), the entire 1 atmospheric pressure is only DUE to the PART of water which is EVAPORATED before? As boiling is not started yet!!I hope it's help you |
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| 26. |
Balanced equation for the preparation of iron(iii) chloride |
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Answer» 2 FE + 3 Cl 2 ------------> 2 FECL3 IRON ( lll ) Chloride is FORMED by direct combination or synthesis reaction. |
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| 27. |
Why lassain test in used sodiam metal |
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Answer» saigne's test is DETECTION test for presence of nitrogen,halogen and sulphure. The organic COMPOUND is fused with SODIUM metal whereby nitrogen is converted into sodium cyanide,halogen into sodium halide and sulphure into sodium sulphide. ... Thus for detection of these elements,sodium fusion EXTRACT is prepared.I hope it's HELP you |
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| 28. |
Sodium carbonate reacts with ethanoic acid to form sodium ethanoate |
| Answer» NA2CO3 + CH3COOH--- CH3COONA + HCO3 | |
| 29. |
What is electronic confirgrution |
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Answer» The electron configuration is the DISTRIBUTION of electrons of an ATOM or MOLECULE in atomic or molecular orbitals. The electrons are distributed on the BASIS of Neil Bohr 's formula which is 2n^2 .Hope it helps you! PLS mark brainliest! |
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| 30. |
Relation between enthalpy ,pressure , volume and internal energy |
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Answer» .................... |
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| 31. |
Researchers have recently developed potent molecule to treat which disease |
| Answer» HOLA mate.Researchers have recently DEVELOPED POTENT molecule to TREAT chickengunya disease.hope it helps you | |
| 32. |
What is sublimation naphthalene ball and heating and cooling |
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Answer» sublimation means change from solid to GAS heating means solid to liquidcooling means LIQUID to solid |
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| 33. |
Is SOL is a colloid |
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Answer» yes plzz FOLLOW me and Mark as BRAINLIST plzz PLEASE please please please please please please please please please please please please |
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| 34. |
V (c) Xe (d) NoQ:-12 In dark, which of the following reacts with hydrogen(a) Bry(b) R(c) ,(d) Ch.Q:-13 Which of the following represents dear electropositiveproperties(a) F(b) CI(c) Br(a) , |
| Answer» 12 answer is D CH because it REACT in dark with Hydrogen13 answer is BR | |
| 35. |
А) лопипп 8а. Q:-7 The sky looks blue due toa) refractionb) reflectionc) dispersion effectd) scatteringQ:-8 The presence of charge on colloidal particle is indicatedbya) electrolysisb) dialysisc) tyndal effectv d) none of theseQ:-9 Which is the lightest gasa) Hydrogen(b) Oxygen(c) Helium(d) NitrogenQ:-10 The inert gases are(a) Polyatomic(b) Triatomic(c) Diatomic(d) MonoatomicQ:-11 The noble gas which forms maximum number ofcompounds is(a) Ar(b) HeV (c) Xe(d) Ne0:-12 in dark, which of the following reacts with hydrogenhlF |
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| 36. |
What is law of chemical combination? |
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Answer» Laws Of Chemical Combination For Elements And Compounds:-In simple TERMS, this law states that matter can NEITHER be created nor DESTROYED. In other words, the TOTAL mass, that is, the sum of mass of reacting mixture and the products formed REMAINS constant. |
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| 37. |
Calculate the molality of 45 gm of HNO3 dissolved in 80 gm of h2o |
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Answer» Moles of HNO₃ = 45 g / (45 g/mol) =2.0160 H (2*1.008) + 15.9990 O (1*15.999) molWeight of solvent = 750 g = 0.80kgMolality = Moles of solute / Weight of Solvent in KG= 2.5 mol / (0.80kg)=3.125 ANS |
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| 38. |
Pharmacopeia kya hai |
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Answer» an official publication containing a LIST of MEDICINAL drugs with their effects and DIRECTIONS for their USE. |
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| 39. |
At what temperature the volume of water is minimum ? |
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Answer» The TEMPERATURE at which WATER is at maximum density and THEREFORE has the least volume is about.I hope it's helps you plz FOLLOW me |
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| 40. |
Atomic radius decreases from left to right in a period ? |
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Answer» Atomic size decreasesExplanation:Because on moving LEFT to right,Nuclear charge INCREASES and the VALENCE shell electrons are attracted towards the CENTRE of the NUCLEUS. |
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| 41. |
Atom positions in rietveld refinement method meaning |
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Answer» tion:Rietveld refinement is conducted by fitting a calculated DIFFRACTION pattern to the observed data by adjusting each of the VARIABLES that describe the diffraction pattern. ... The input data to a refinement include the space group, atomic positions, site occupancies, and LATTICE PARAMETERS. |
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| 42. |
Reaction of phosphorous with h2so4 woth balanced chemical equation |
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Answer» -step solution:Step 1 of 3THE unbalanced reaction between sulfuric acid and phosphorus to form sulfur dioxide, phosphoric acid and water is as follows:In order to balance this reaction, the oxygen atoms need to be BALANCED. Notice that all the oxygen in the reaction begins in sulfuric acid and is SPLIT between phosphoric acid and water. There is an even number of oxygen atoms on the LEFT side of the reaction, so there must be an even number of oxygen atoms on the right. Therefore, place a two in front of the water molecule to make the total number of oxygen atoms on the right an even number. |
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| 43. |
Prepare aqueous solution of various solid salts available in the laboratory observe what |
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| 44. |
Pressure of 1gm of an ideal gas a at 27c is found to be 2 bar .When 2gm of another ideal gas b is introduced in the same flask at same temperature the pressure becomes 3bar.Find relationship between their molecular masses. |
| Answer» TION: मुझे इसका उत्तर नहीं पता बिकॉज में केमेस्ट्री नहीं जानती दूसरों के लिए वेट करो कि वह उत्तर देंगे | |
| 45. |
Kon kon class 12th me ho 12th wale whatsapp group banate hai ekhelp hogi sample papers milne mein and other resources bhi mil jaegi..kya kahte ho tum sab..alag alag jagah ke students milke ek group banate hai.agar paper leak hua to sabko fayda(joking lol)agar add hona hai to follow me and message me |
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| 46. |
Q:-15 wh solubilitQ:-16 WQ:-17 NOQ:-18 a)formedQ:-1 Which of the following is the property of physisorptionva) nonspecific natureb) highly specificc) irreversibilityd) none of the aboveQ:-2 Enzymes area) Microorganismb) Proteinc) Inorganic compoundd) noneQ:-3 Alum purifies muddy water bya) Dialysisb) Electrophoresisc) Coagulationd) Forming emulsionQ:-4 The formation of micelle takes placea) above kraft temperature and below CMCb) above Kraft temperature and above CMCwe below kraft temperature and above CMCd) Below Kraft temp and below CMCQ:-5 Which of the following is most effective in causing theflocculation of negativeily charged arsenious sulphide sola) KCIb) MgCl2c) K3[Fe(CN)4]d) ALCI3Q:-6 Aerosol isa) liquid in solidb) liquid in gasin liquidd) solid in gasQ:-19 ExQ:-20 aincreasQ:-2a)Wb)c)Wd) |
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Answer» A LONG QUESTION.. How can I GET the ANSWER to the question and how will I answer to your question?? |
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| 48. |
How to find the general configuration of a given block (for example s,p,d,f)?? |
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| 49. |
Applications of hydrogen peroxide |
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Answer» n peroxide is a CHEMICAL compound with the formula H2O2. In its pure FORM, it is a very pale blue,[5] clear liquid, slightly more viscous than WATER. Hydrogen peroxide is the simplest peroxide (a compound with an oxygen–oxygen single bond). It is used as an oxidizer, BLEACHING agent and antiseptic. Concentrated hydrogen peroxide, or "high-test peroxide", is a reactive oxygen SPECIES and has been used as a propellant in rocketry.[6] Its chemistry is dominated by the nature of its unstable peroxide bond. |
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| 50. |
Preparation of hydrogen peroxide |
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Answer» Industrial METHOD of PreparationHydrogen peroxide is prepared by the ELECTROLYSIS of 30% ice-cold H2SO4. When acidified sulfate SOLUTION is electrolyzed at high current density, peroxodisulphate is obtained. Peroxodisulphate is then hydrolyzed to get hydrogen peroxide.Hydrogen peroxide Chemical formula: H2O2Molecular Weight/ Molar Mass: 4.0147 g/molBoiling Point: 150.2 °CH o p e T h i s H e l p s . . . ! :) |
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