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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. |
Molar volume of gas explain |
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Answer» The molar volume, symbol Vₘ, is the volume occupied by ONE MOLE of a substance at a given TEMPERATURE and pressure. please MARK my answer The BRAINLIEST |
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| 2. |
Calculate the no.of atom is each of the following .1) 0.4 mole of hydrogen 2) 1.6 g of sulphur |
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Answer» Answer: to calculate the number of ATOM is a SIMPLE didive it's weight in GRAMS by the AMU ATOMIC mass from atomic mass |
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| 3. |
Define sonorousity ? |
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Answer» Answer: -METALS POSSESS SONOROUS property. -They MAKE sound on striking them.
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| 4. |
Chlorine - 35 , mass no.....,no. of protons...., no. of neutrons ..,..and no. of electrons ...? |
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Answer» Answer: HEY MATE... GOOD EVENING.. NO OF PROTONS - 17 NO OF NEUTRONS - 18 NO OF ELECTRONS - 17 HOPE IT HELPS...!!! |
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| 5. |
The frequency associated with photon of radiation having a wavelength of6000Aº isa) 5x10power 14 Hzb) 5x10power10 Hz c)2x10power 14 Hz d) 5×10power 15 Hz |
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Answer» SEE the ATTACHMENT.... |
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| 7. |
A sample of the gas at 15degre Celsius at 1atm. has a volume of 2.58dmcube. when temperature is raised to 38 degree Celsius at 1atm does the volume of the gas increase?if so, calculate the final volume. |
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Answer» hhhhhhhhhhhhhhhhhhhhhhh |
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| 8. |
Explain the following terms mole fraction,molarity, molality |
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Answer» Answer: HIIIgood evening☺️ Explanation: mole FRACTION:- it is the RATIO of number of mole of TWO component of the total number of mole of solution molarity:- it is the number of grams mole of solute dissolved per litre of solution molality:- it is the number of grams mole of solute dissolved in 1000 GRAM of solvent it represent by m follow me ✔️ |
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| 9. |
A compound ‘X’ on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound ‘Y’. ‘X’ also reacts with sodium metal to evolve a colourless gas ‘Z’. Identify ‘X’, ‘Y’ and ‘Z’. Write the equation of the chemical reaction of formation of ‘Y’ and also write the role of sulphuric acid in the reaction. |
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Answer» X →443 Kconc. H2SO4 Y ( unsaturated compound) Z is hydrogen (Colourless gas) X, Y and Z are alcohol, alkene and hydrogen respectively. Suppose X is ethanol,it GIVES alkene on reacting with CONC. H2SO4 C2H5OH (X) →443 Kconc. H2SO4 C2H4 (Y) 2C2H5OH →Na2C2H5O-Na+ + H2 (Z) ROLE of sulphuric acid: It is USED as a dehydrating agent in the above reaction. |
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| 10. |
Why non-metals do not displace from dilute acid? |
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Answer» because generally non -metals do not react with water and DILUTE acid have more CONCENTRATION of water in it. HOPE this will help you. |
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| 11. |
How we find the valency of a radical ? |
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Answer» Answer: VALENCY is found by the number of VALENCE ELECTRONS in the valence ORBIT or last orbit. ✔️ PLEASE MARK ME AS BRAINLIEST IF THE ANSWER IS CORRECT ❤️ ❤️ ❤️ |
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| 12. |
What is object which can extend more in metals |
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Answer» iron |
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| 13. |
Number of H+ ions from one molecule of HNO3 |
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Answer» Answer: 6.023*10^23 Explanation: I molecule = 6.023 *10^23 IONS here , H+ ions are only one. HNO3 ------> (IONIZATION) H+ + NO3- |
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| 14. |
Hii A very interesting question for JEE nd Neet aspirants➡️ The rate constants k1 and k2 for two different rxn are 10^16. e^-2000/T and 10^15. e^-1000/T respectively. The temperature at which k1=k2 is___? |
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Answer» here is your answer in the ATTACHMENT |
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| 15. |
Number of H+ ions in one molecule of HCl |
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| 16. |
28. Enthalpy of formation of NHz is – X kJ and AHH_H,AHN-H are respectively Y kJ mol and Z kJ mol-1.The value of AHN=Nis(2) - 3Y+6Z-2X(1) Y-62 +(3) 3Y + 6Z+X(4) Y + 6X + Z |
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Answer» Explanation: 28. ENTHALPY of formation of NHZ is – X KJ and AHH_H, AHN-H are respectively Y kJ mol and Z kJ mol-1. The value of AHN=Nis (2) - 3Y+6Z-2X (1) Y-62 + (3) 3Y + 6Z+X✔️✔️✔️ (4) Y + 6X + Z |
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| 17. |
ALPHA METHOXY PROPIONALDEHYDE (STRUCTURE) |
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Answer»
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| 21. |
Why boiling water should not be used in the preparation of inhalation |
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Answer» Answer: Because of boiling water, steam is created in the process. When that steam is inhaled it causes some problems for the PERSON inhaling it. For example, You MAY GET SCALDS like getting burned during a steam INHALATION therapy. There is a need for great care for people while inhaling boiling water especially in the cases of children. Plus its proven that inhalation therapy doesn't really give any relief from bacteria so we must think, whether the risk is worth it or not. |
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| 22. |
Write condensed formuka |
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Answer» Hope it helps.... PLZ mark BRAINLIEST |
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| 23. |
What is efflorescence? |
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Answer» Answer: Efflorescence, spontaneous LOSS of water by a hydrated salt, which occurs when the aqueous vapor PRESSURE of the hydrate is GREATER than the PARTIAL pressure of the water vapour in the air. |
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| 24. |
How can sulphuric acid is dangerous in what ways |
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Answer» Answer: Concentrated sulfuric acid is extremely corrosive and can cause serious burns when not handled properly. This chemical is unique because it not only causes chemical burns, but also secondary thermal burns as a result of dehydration. This dangerous chemical is capable of corroding skin, paper, metals, and even stone in some cases. If sulfuric acid makes DIRECT contact with the eyes, it can cause permanent blindness. If ingested, this chemical may cause internal burns, irreversible organ DAMAGE, and possibly death. Exposure to sulfuric acid aerosols at high concentrations leads to severe eye and respiratory tract irritation and tissue damage. CONSISTENT exposure to sulfuric acid aerosols, even at low concentrations, can cause a person’s teeth to erode. In laboratory or industrial settings, it’s important to use proper PPE when handling sulfuric acid. At home, you are most LIKELY to encounter concentrated amounts of sulfuric acid when using an acidic drain cleaner. It’s important to follow the safety instructions on the drain cleaner label to avoid these serious HAZARDS (possibly life-threatening) risks. |
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| 25. |
plzz answer my question if any body answer my question correctly for them i will mark as brainlist or i will them thanks |
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Answer» Answer: 29.acidic 30.acid SALT |
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| 26. |
B. Potassium dichromate (K,Cr,0,),percentage composition |
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Answer» Potassium Dichromate is K2CR2O7 % of K = 39x2/292 = 26.7% % of CR = 51x2/292 = 34.9% % of O = 16x7/292 = 38.4% |
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| 27. |
how are coal formed and what is coak and coal tar and how are petroleum formed explain this by the book of Sk jain and shailash k jain and please explane it by only this book so that i can understand and don't ignore because if you are really good person then you can use and explain each line |
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Answer» Answer: coal formed by DEAD plant coak and coal tar is substance made by coke petroleum formed by dead water ANIMAL WHIXH TAKE million YEAR |
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| 28. |
What is the achievement of dobereiners triads |
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Answer» Answer: Achievements of DOBEREINER's triads : He grouped the elements with SIMILAR chemical properties into clusters of three called 'Triads'. The DISTINCTIVE feature of a TRIAD was the atomic mass of the MIDDLE element. |
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| 29. |
Why do we write CH3COO for acetate instead of C2H3O2? |
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| 30. |
Define meabilabilaty ? |
Answer» It is the property of metals which allows them to be broken into THIN SHEETS. Aluminum is most mellable metal.thank you !!!!! |
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| 31. |
Effect of liquid nitrogen |
| Answer» INSTANT FREEZING of any OBJECT that COMES in CONTACT with it. | |
| 32. |
Correct order of increasing size Na+ Mg2+ Al F- it is Only Al I have checked |
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Answer» Explanation: |
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| 33. |
कैलेमाइन किस धातु का अयस्क है? |
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Answer» उन शैलों को अयस्क (ORE) कहते हैं जिनमें वे खनिज हों जिनमें कोई धातु आदि महत्वपूर्ण तत्व हों। |
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| 35. |
Acetic acid + phosphorus Pentachloride - ? + pocl3+ ? |
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Answer» ACETIC ACID +PHOSPHORUS pentachloride>>ch3cocl+pocl3+hcl |
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| 36. |
Explain the manufacture of caustic soda |
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Answer» caustic soda PRODUCTION and manufacturing process:nearly all caustic soda is generated by the electrolysis of sodium chloride solution USING one of three cell types Mercury, DIAPHRAGM and membrane cells |
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| 38. |
Soil air is important for root to carry out his what |
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Answer» Explanation: to carry out or MAKING a large quantity of food because they are AUTOTROPHIC living |
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| 39. |
What is the value of ∆S and ∆H in melting of ice |
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Answer» ..................... |
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| 40. |
How will you separate pure ammonium chloride from a mixture of common salt |
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Answer» By PROCESS of SUBLIMATION.. |
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| 41. |
Write condensed formulae for the 2,4,5-trimethylhexane |
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Answer» The answer is in the IMAGE.... Hope it HELPS plz mark me as BRAINLIEST..... |
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| 42. |
Give one use of coke |
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Answer» as a FUEL in trains mark me as the brainlisest |
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| 43. |
10 ml of 1M HCl is diluted to 1 litre. Calculate the pH of diluteacid ?[Ans : 2 |
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Answer» Answer: Explanation: M1=1 M V1 = 10 ml V2 = 1000 ml M2 = ? M1 * V1 = M2 * M2 1 * 10/1000= M2 M2 = 0.01 PH = -log * M2 =2 ( you can check in log table the VALUE of 0.01 = 2) Hope it helps you : ) |
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| 44. |
The mass of 200atoms of Na is |
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Answer» Answer:4600 Explanation: 23*200 |
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| 45. |
explain why a mixture of iron powder and sulphur glows more brightly when heated than that of iron fillings and sulphur |
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Answer» ferrous sulphide is formed LINK in ATTACHMENT |
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| 46. |
Least basic oxide among the followingfe2O3 FeOBaO Na2O |
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Answer» BaO Explanation: |
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| 47. |
CHEMISTRYThe basicity of H3PO4 in the following reaction is NaOH + H2PO4 → NaH2PO4 + H2016.a) Oneb) Twoc) Threed) Four |
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| 48. |
Why are third period elements called typical elements? |
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Answer» Answer: Third period elements are called TYPICAL elementsbecause they represent PROPERTIES of their own group. ... Reasons for differences in their periodic properties and HENCE in their chemical behavior are: SMALL size of these ATOMS |
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| 49. |
Ten picometer represent |
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Answer» Answer: 10^-12 m........,...m |
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| 50. |
"no two electrons in the same atoms can have identical set of |
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Answer» PAULI Exclusion Principle. The Pauli Exclusion Principle states that, in an atom or molecule, no TWO electrons can have the same FOUR electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing SPINS. |
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