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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. |
Calculate the unit of molar conductivity |
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Answer» Siemens CONDUCTIVITY (or SPECIFIC conductance) of an ELECTROLYTE solution is a measure of its ability to conduct electricity. The SI unit of conductivity is Siemens per METER (S/m). |
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| 2. |
"In Phosphorus atom find out the no. of paired!electrons for l=1 and m=0 |
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Answer» hope it HELPS you |
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| 3. |
The dehydraion yield of cyclohexanol to cyclohexene is 75% What would be the yield if 100 g of cyclohexanolis dehydrated(A) 61.7g(B) 16.5 g(C) 6 15 g(D) 615 g |
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| 4. |
Explain Aufbau principle with the help of electronic configuration of the element with atomic number 21. |
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Answer» The aufbau PRINCIPLE STATES that in the GROUND state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. For example, the 1s shell is filled before the 2s subshell is occupied. In this way, the electrons of an atom or ion form the most stable electron configuration possible. An example is the configuration 1s2 2s2 2p6 3s2 3p3 for the phosphorus atom, meaning that the 1s subshell has 2 electrons etc. hope it helps... plz MARK it brainlist... |
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| 5. |
Calculate the number of moles for the following: (i) 4g NaOH (ii) 5.6g of N2 |
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Answer» 4 g NaOH - 0.1 mole 2.28 g of N2 - 1mole 5.6 g of N2 - 1/5 mole =0.2 moles Hope it helps |
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| 6. |
The total number of AIF, molecule in a sample of AIF, containing 3.01 10 ions of Fis:(A) 9.0 x 1024(B)3.0× 10 24(C) 7.5 10 23(D) 10 23 |
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Answer» . m........ |
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| 7. |
. In Phosphorus atom find out the no. of pairedelectrons for (= 1 and m = 0 :-(1) 3(2) 1(3) 2(4)0 |
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Answer» Answer: 2 OPTION................. |
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| 8. |
Rakesh needs 1.71 g of sugar (CH..0..) to sweeten his tea. What would be the number of carbon atom presentin his tea:(A) 3.6 10-(B) 7.2 * 1021(C) 0.05 102(D) 6.6 x 1022 |
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Answer» The answer is (A) The number of moles is the RATIO of mass to MOLAR mass. Moles of Sugar = 3421.71=2001 mol The number of molecules is the product of the number of moles and Avogadro's number NA=6.023×1023. Number of molecules = 2001×NA Number of C ATOMS = 12×2001×NA =3.6 ×10 22 |
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| 9. |
GI of dimethylcyclopropane |
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| 10. |
A and B are 2 liquids which form an ideal solution. P0a and p0b are 400mm and 600mm respectively. A solution contains 2 moles of a and 3 moles of b. Find the vapour phase mole fraction when the first bubble of vapour is formed. B. Find the vapour phase mole fraction when last bubble is left Plz help with atleast A. |
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| 11. |
The isotopic abundance of C-12 and C-14 is 98% and 236 respectively What would be the sameotope in 12 carbon sample(A) 1032 10* (R) 30110 (C) S 10 (D) 602-10P |
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Answer» Answer: 14 g of CARBON 14 ATOM contains =6.023×1023atoms 1 g of carbon 14 atom contains =6.023×1023/14 12 g of carbon 14 atom contains =(6.023×1023×12)/14 =5.16×1023 Now its 2% is (5.16×1023×2)/100 =10.32×1021 So, the NUMBER of C−14 ATOMS in 12 g of carbon is 10.32×1021 |
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| 12. |
Substance A has highly compressibility and can be liquefied easily . It can also take shape of container in which it is stored . Name the substance?? |
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Answer» GAS as they do not have FIXED shape and fixed volume. They have large interparticle space. They have least forces of ATTRACTION between the molecules. They are highly compressible. |
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| 13. |
A and B are 2 liquids which form an ideal solution. P0a and p0b are 400mm and 600mm respectively. A solution contains 2 moles of a and 3 moles of b.Find the vapour phase mole fraction when the first bubble of vapour is formed.B. Find the vapour phase mole fraction when last bubble is leftPlz help with atleast A. |
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Answer» POA and pob=400and600mm |
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| 14. |
0.1Ur ode (0) Chromium(II) sulfatePart-2The haemoglobin from the red blood corpuscles of most mammals contains approximately 0 33% of iron byweight the molecular weight of haemoglobin as 67,200 The number of iron atoms in each molecule of haemo-globin is (atomic weight of iron 50)(A) 2(B) 3(C) 4(D) 5 |
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Answer» the number of iron ITOM in each MOLICULE of haemoglobin is 3 |
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| 15. |
Best book for organic chem iit .....??? |
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| 17. |
Criss cross method of cupric sulphate |
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Answer» Explanation: The SUBSCRIPTS are then REDUCED by the greatest common factor. The chemical FORMULA compound by Cris's cross method of copper SULPHATE is CuSo4 where the valency of Cu is 2 and valency of So4 is 2. So after CRISS cross method the formula is Cu2(So4)2 hope so it helps plz mark as brainlist |
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| 18. |
Give the formula of the chloride of the element x and y having atomic number 3 and 6 respectively. will the properties of the two chloride be similar or different?explain your answer. |
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Answer» Hi there , 《X》 is a metalic element ,which is LITHIUM [ Li ] 《Y》 is a nonmetal element , which is carbon [ C ] ☆ The CHLORIDE of X is《 XCl 》, it is ionoic compound ☆ The chloride if Y is 《 YCl4》, it is covalent compound ◇ So, the properties of two chlorides are DIFFERENT ♡ Hope the answer is helpful ♡ Plz mark it as BRAINLIEST answer |
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| 19. |
Source chemistry class 11 cheMistry |
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Answer» we know , E = hc/wavelength so you can FIND the VALUE of E.
E is ALSO equal to the sum of the energies of the 2 PHOTONS. (since energy ABSORBED is released) so using the same formula again, you can find the wavelengths of the photons thanks |
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| 20. |
To identify and estimate metal ion such as cd ^2+ ,pb^2+,zn^2+,ni^2+ using polarographically |
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Answer» by indentyfing it and ESTIMATING it |
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| 21. |
FROM CLASS 11 CHEMISTRY CH2 THE PERSON WHO PROPERLY SOLVE IT MARK AS $$BRAINLIST$$ |
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Answer» Brother write first the ELECTRONIC configuration of chlorine and ARGON atom then it will be EASY. |
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| 22. |
Write the product formed on reaction of d-glucose with br2 water |
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Answer» gluconic ACID Explanation: when GLUCOSE is REACTED it forms gluconic acid.(CH2OH4COOH) PLEASE MARK AS BRAINLIEST.... |
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| 23. |
Write peadogogical analysis of transmission of heat |
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Answer» Answer: Heat can be transferred from one place to another by three methods: conduction in SOLIDS, convection of fluids (liquids or gases), and radiation through ANYTHING that will allow radiation to pass. The METHOD used to TRANSFER heat is usually the one that is the most efficient. |
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| 24. |
Write the approximate value of latent heat of ice and of steam\ |
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Answer» the latent heat of steam age 333 KILO joule per KG and the Ice Age 2256 KJ per kg |
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| 25. |
Zinc liberates hydrogen gas when reacts with dil.Hcl whereas cu does not why ?? |
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Answer» because when we can zn plus hcl GIVES zncl2 plus hcl copper does not COME yet |
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| 26. |
Write the reaction showing change of colour characteristics |
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Answer» Answer: the chemical reaction between CITRIC acid and purple COLOUR POTASSIUM PERMANGANATE solution is characterized by change colour from purple to COLOURLESS |
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| 27. |
Write the electronic cofugaration of chromium and copper |
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Answer» There are two main exceptions to electron CONFIGURATION: chromium and copper. In these cases, a completely full or half full d sub-level is more stable than a partially filled d sub-level, so an electron from the 4s orbital is EXCITED and RISES to a 3D orbital. ... Alright so LET's talk about chromium. |
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| 28. |
To synthesise benzene from benzanilide through multiple process |
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Answer» follow me I don't KNOW the answer mark me as brainliest |
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| 29. |
Write a twenety chemical equationcs and blanced them class for 10 with solution |
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Answer» these are the 23 CHEMICAL EQUATION BALANCER for 10th class 10 solution |
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| 30. |
Write the reaction of tca where carbon dioxide are lossing |
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Answer» Letter to POLICE OFFICERS REGARDING robbery in trainLetter to police officers regarding robbery in trainLetter to police officers regarding robbery in trainLetter to police officers regarding robbery in trainLetter to police officers regarding robbery in trainLetter to police officers regarding robbery in train |
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| 31. |
Write 20 compounds name with their chemical formula |
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Answer» Answer: BACL2- barium chloride Nacl- sodium chloride H20 - WATER C02- carbon dioxide C0- carbon monoxide Caco3- calcium carbonate Cao- calcium oxide Ca( OH)2 - calcium hydroxide Mg0 - magnesium oxide K0H - potassium oxide C6H12O6 - glucose CH3COOH - vinegar Fe2O3 - Rust (Iron oxide) Na0H - sodium hydroxide HCL- hydrochloric acid H2S04 - sulphuric acid HN03 - nitricacid Al203 - aluminium oxide N02- Nitrogen dioxide S02 - sulphur dioxide |
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| 33. |
Why rxn of li with h2o is less vigorous than sodium? |
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Answer» the REACTION of sodium is more vigorously with H2O liquid sodium is more reactive than LITHIUM sodium react with COLD water why Lithium react with water |
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| 34. |
Why the dipole moment of chlorobenzene is lower than that of cyclohexyl chloride? |
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Answer» Answer: |
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| 35. |
Why was it more difficult to design an experiment that would prove the existence of neutrons than it was to design an experiment that would prove the existence of either protons or electrons? |
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Answer» ___________ |
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| 36. |
Why probability function shows probability of finding nucleus in nucleus = infinity? |
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Answer» is that for SCHRODINGER's WAVE EQUATION |
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| 37. |
Why tungsten is used for filament of electric lamp? |
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Answer» ANSWER: because it is the GOOD CONDUCTOR of HEAT and electricity. Explanation: |
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| 38. |
Write characteristics of paeticles of mater .Justify each characteristc with an activity |
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Answer» Particles of MATTER are NEVER at rest and keep moving CONTINUOUSLY in these free spaces. The particles of matter move continuously and their speed increases with an increase in TEMPERATURE. The particles of matter attract each other. However, this FORCE of attraction varies from matter to matter. |
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| 39. |
Why pem fuel cell is superior than other fuel cells? |
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Answer» Answer: |
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| 40. |
Why water is removed in preparation of esters from acids? |
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Answer» Answer:In an ESTERIFICATION reaction the forward reaction is condensation (i.e) WATER is split out as a product. The reverse reaction is a hydrolysis. Water is used in breaking the ester bond to FORM the alcohol and carboxylic ACID. |
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| 41. |
What is the valancy of zincate |
Answer» The formula for SODIUM ZINCATE is Na2ZnO2 . The valency of zincate radical as a WHOLE is 2 . |
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| 42. |
The density of two gases are in the ratio 1 ratio 3 then molecular mass are in the ratio of |
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Answer» Explanation: 1:3 |
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| 43. |
What state of matter has the higher kinetic energy between the molecules |
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Answer» Answer: Explanation: All particles have ENERGY, but the energy VARIES depending on the TEMPERATURE the SAMPLE of matter is in. This in turn determines whether the substance exists in the solid, liquid, or gaseous state. Molecules in the solid phase have the least AMOUNT of energy, while gas particles have the greatest amount of energy. |
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| 44. |
Why are substances like platinum and palladium often used for carrying out electrolysis? |
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Answer» Answer: EXPLANATION:platinum and PALLADIUM are use for electrolysis B 'cause they are inert And also they are GOOD absorber.. |
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| 45. |
Why rate of photosynthesis is low in extreme temperatures? |
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Answer» Answer: ENZYMES involved BECOME denatured Explanation: |
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| 46. |
Why plants leaves crush in phosphate buffer potassium? |
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Answer» Because of HIGH REACTIVITY |
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| 47. |
Why is intramolecular h bonding streangth more in phenol than in alcohol? |
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Answer» Monohydric alcohols may be further classified ACCORDING to the ..... of intermolecular hydrogen bonding in them which is lacking in ETHERS ... in an INCREASE in ionisation of phenols than that of alcohols. |
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| 48. |
Why is the atomic mass of an element not a whole number? |
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Answer» Answer: Because of the existence of isotopes. Explanation: Let's look at the simplest atom, hydrogen. The majority of hydrogen atoms are the ¹H isotope; their nuclei contain the 1 proton, the one positively charged nuclear particle. A few hydrogen nuclei contain the 1 proton (this is of course what defines them as hydrogen atoms), but also 1 neutron in addition, to give the deuterium, ²H, isotope; a smaller fraction of hydrogen nuclei contain 2 neutrons, to give the tritium isotope, ³H. I stress that all of these nuclides are hydrogen atoms, because Z = 1 , but they are isotopically different because of the presence of SMALL fractions of the heavier isotopes, i.e. their mass is double or treble because of the presence of the heavier nuclide. As Z increases, the nucleus can support different numbers of neutrons, and thus for heavier elements there is an isotopic distribution. The mass quoted on the Periodic Table is the weighted average of the individual isotopes. The element tin, Z = 50, has 10 stable isotopes, and the atomic mass quoted on the Periodic Table, 118.710.g.mol⁻¹, is the weighted average of the individual isotopes. As isotopically labelled MATERIALS go, D₂O( L ) or D₂(g), i.e. the so-called isotopomers of water and dihydrogen, are RELATIVELY cheap. That is, deuterium or heavy water are expensive, but because when these are incorporated into your reference COMPOUND, your compound becomes ISOTOPICALLY distinct, and thus MAGNETICALLY DISTINCT, i.e. ²H N M R SPECTROSCOPY becomes possible, which is nowadays a routine experiment, and its results may be powerful and discriminating. |
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| 49. |
Why is sandsmeyer reaction has more yield than gatterman? |
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Answer» The yield in Sandmeyer reaction is FOUND to be better than Gattermann reaction. ... This replacement LEADS to FORMATION of aryl halide more easily and under mild CONDITIONS than Sandmeyer reaction although the yield is reduced. |
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| 50. |
Why is weekend glycol added to water in read radiators? |
Answer» Answer:It is used as an anti-freeze Explanation:Adding ethylene GLYCOL or weekend glycol to water reduces the freezing point of water. Water freezes at temperatures much less than 0 degree Celsius when ethylene glycol is added to it. It is used as an anti-freeze. This practice was mostly practiced in older radiators in cold weather CONDITIONS. Modern radiators use coolants that contain ethylene glycol, propylene glycol, 1,3 butylene glycol, hexylene glycol, diethylene glycol or glycerin for which we don't need to add any extra glycol. Another aspect of USING the glycols is that they have a higher boiling point(197 DEG C) as compared to water. Hence, they don’t get vapourised easily inside the radiator. They also have a higher specific heat capacity for which they are capable of transferring more heat from the engine as compared to water. |
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