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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. |
Write structural formula of the alcohol that results whenacetaldehyde is reacted with CH,MgBr in the presence ofdry ether and the product is hydrolysed. |
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Answer» The structural formula of the alcohol that results when acetaldehyde is reacted with CH,MgBr in the presence of dry ether and the product is hydrolysed is CH3-CHOH-CH3
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| 2. |
Choose the correct alternative.which among the following hydride is NOT a reducing agent. 1.H2O.2.H2S.3.H2Te.4. H2se. |
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Answer» (1) H20 is not a REDUCING agent. Explanation: |
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| 3. |
how many ampere of current should be passed when aq solution of Na2SO4 is electrolysis between graphite electrode at 300k temprature and 250ml/min of O2 gas obtain under 1 bar pressure |
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Answer» Answer: 6.44 Amps Explanation: Convert the initial conditions to standard conditions (TEMPERATURE and pressure) P1V1/T1 = P2V2/T2 P1 = 1 BAR = 750mmHg V1 = 250ml = 250 cm^3 T1= 300K P2 = 760mmHg V2 = ? T2 = 273 K (750x250)/300 = (760xV2)/273 V2 = (750X250X273)/(300X760) V2 = 224.51 cm^3 1 mole of GAS occupies 22400cm^3 at STP Moles of OXYGEN = 224.51/22400 = 0.001 moles One mole of oxygen is discharged by 4 moles of electrons Moles of electrons = 4 x 0.001 = 0.004 Convert moles to Coulombs 1 moles of electrons = 96485 Coulombs Number of Coulombs = 0.004 x 96484 = 386.8C Coulombs (Q) = Current (I) x Time (t) Time = 1 minute = 60 seconds Current (Amps) = Q/t = 386.8/60 Current = 6.44 Amps |
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| 4. |
Hurrah i made time table to study for 19 hours a day with full concentration yet i am in 10th |
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Answer» OKAY.... That's good✌️ |
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| 5. |
Describe the general Trends of Oxidation state and ionization enthalpy in group 13 and 14 |
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Answer» Answer: Touch and HOLD a clip to pin it. Unpinned CLIPS will be deleted after 1 hour.Tap on a clip to paste it in the text box.Welcome to Gboard clipboard, any text that you copy will be saved here.Use the EDIT icon to pin, add or DELETE clips.Touch and hold a clip to pin it. Unpinned clips will be deleted after 1 hour.Welcome to Gboard clipboard, any text that you copy will be saved here.Use the edit icon to pin, add or delete clips.Touch and hold a clip to pin it. Unpinned clips will be deleted after 1 hour.Use the edit icon to pin, add or delete clips.Tap on a clip to paste it in the text box.Welcome to Gboard clipboard, any text that you copy will be saved here.Touch and hold a clip to pin it. Unpinned clips will be deleted after 1 hour.Tap on a clip to paste it in the text box.Use the edit icon to pin, add or delete clips. |
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| 6. |
Draw the structure of bcl3, NH3 and AlCl3 (dimar) |
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Answer» hope you are CLEAR plz MARK me as BRAINLEAST |
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| 7. |
Write the IUPAC name of the following |
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Answer» ANSWER:this compound is not possible Bcoz in central ATOM of carbon it's linking with more than 4 bonds, which is not possible. |
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| 9. |
What is cathode rays? |
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Answer» CATHODE RAYS are STREAMS of electrons OBSERVED in discharge tubes. |
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| 11. |
Answer.............. |
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Answer» Explanation: HÔPË ÏTẞ HÉLPFŪLL PLS MARK AS BRAINLIEST |
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| 12. |
Calculate the pH of 1.0*10^-5 molar solution of HNO3 |
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Answer» Answer: Explanation: pH=_log10(H+) =_ LOG10(1×10^_5) =_(_5) =5 |
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| 13. |
Draw the structure of BCl3 (dimar) |
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Answer» REFER the above image. Mark it as Brainliest answer. |
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| 14. |
Define and explain thermodynamically reversible process |
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Answer» Answer: In thermodynamics, a reversible PROCESS is a process whose direction can be RETURNED to its original position by inducing INFINITESIMAL changes to some property of the SYSTEM via its surroundings. Throughout the entire reversible process, the system is in thermodynamic EQUILIBRIUM with its surroundings.
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| 15. |
What are concentrated and dilute acid |
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Answer» concentrated acid have HIGH NUMBER of H+ ions while dilute acid have less number of H+ ions hope it helps please MARK me as brainliest and also follow mee radhe radhe ___/!\___ |
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| 16. |
Out of Ti +3 or Co +3 which one has increasing magnetic moment and why... |
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Answer» Co +3 SHOWS more magnetic moment than To +3 Explanation: This is because NUMBER of UNPAIRED electrons in Co +3 is more than Ti +3 Ti +3 electronic configuration is [Ar] 3d¹ Co +3 electronic configuration is [Ar] 3d³ Ti +3 has only one unpaired electron Co+3 has THREE unpaired electrons magnetic moment is find out by using formula √n(n+2) where n is number of unpaired electrons |
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| 17. |
Two flames used to cut and weld metals |
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Answer» hii.... yess..... it's correct it's OXIDIZING FLAME mark it brainliest plz... |
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| 18. |
How many maximum elements are associated with n+l=6 if n=4.... |
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Answer» Answer: n +L = 6 , n= 4 , so l =2 (d subshell). that is 4d shell ,so NUMBER of ELECTRONS accommodate is 10 |
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| 20. |
an element X belongs to 3rd period and second group of modern periodic table. write the electronic configuration. write the formula of the compound it forms with S. Write the formula of the compound X reacts with Y of electronic configuration 2,6. |
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Answer» ELECTRONIC CONFIGURATION is 2,8,2 X2S XY |
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| 21. |
Give example of saturated and unsaturated solution. |
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Answer» Answer: Iced TEA and coffee are other examples of UNSATURATED solutions. Saturated solution definition:A saturated solution can be defined as a solution which dissolves solute until it is unable to dissolve anymore and LEAVING the un-dissolved at the bottom. |
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| 22. |
Define chloralkali process |
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Answer» The chloralkali process is an industrial process for the ELECTROLYSIS of sodium CHLORIDE solutions. It is the technology used to produce chlorine and sodium hydroxide, which are commodity CHEMICALS required by industry. 35 MILLION tons of chlorine were prepared by this process in 1987. |
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| 23. |
Difference between respiration and combustion at least 3 points |
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Answer» RESPIRATION is we BREATH. COMBUSTION MEANS burning something |
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| 24. |
Copperoxide addedwith Hcl equation |
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Answer» CuO + HCl -----> No REACTION... |
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| 25. |
What is the concentration of dissolved oxygen at 50°C underpressure of one atmosphere if partial pressure of oxygen at50°C is 0.14 atm. |
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Answer» Answer: Partial pressure = Mole FRACTION × Total Pressure Pt= 1atm Xo2 = 0.14 Xo2 = NO2/nO2 + nH2O nO2 + 55.5/nO2 = 1/0.14 1 + 55.5/nO2 = 7.14 55.5/nO2 = 6.14 nO2 - 9 Molarity= 9/1= 9M |
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| 26. |
Define chemical potential and explain its significance |
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Answer» SEND again grtsyrjw getaueb |
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| 27. |
The smell of hydrogen sulphide (H2S) isa) pleasantb) like that of rotten eggsc) starch and waterd) tap powder and water |
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Answer» Answer: hydrogen SULPHIDE SMELLS like rotten eggs PLEASE follow me |
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| 28. |
Electricity ispassedthrough |
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Answer» ELECTRICITY is passed through a conductor LIKE WIRES |
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| 29. |
3. The chemical compound responsible for the green deposit on the surface of articles of copper.4. A metal used in flexible pipes.5. A halogen which is a solid at room temperature. |
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Answer» Answer: 3.the CHEMICAL compounds is COPPER carbonate caco3.caoh 4 and 5 I have doubt so I will suggest that you try and GOOGLE it |
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| 30. |
Question no. 2 ka a b c solved plz |
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Answer» HELLO! (a) The lowest frequency in Balmer series CORRESPONDS to the transition from n = 2 to n = 3. Check out the ATTACHMENT for the answer. (b) For hybridisation, of CARBON atom, take care of the following points: All four sigma bonds: sp³ Three sigma & one pi bond: sp² Two sigma and two pi bonds: sp Now to answer your question, from left to right, the hybridisation of the carbon atoms are: sp, sp, sp², sp³ (The left most bond is a triple bond). (c) Electron affinity is the energy RELEASED when an electron is inserted into the valence shell of an isolated gaseous atom. Carbon has more electron affinity than nitrogen because Carbon is one electron short of it's half filled stability (as the electronic configuration of carbon is 2p²), whereas nitrogen is ALREADY has the half filled stability. So, more elnergy is released when an electron is inserted in the p orbital of carbon than in nitrogen. Thanks! |
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| 31. |
2.Observe the following equation and anne following equation and answer the given questions.Fe,0, + Al → A1,0, + FeQuestions:i) Mention the products in the given equation.ii) What information does the equation gives us ? |
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| 32. |
The number of mole of methyl are iodide required to prepare tetramethyl ammonium from one mole of methyl amine is/are |
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Answer» I not UNDERSTAND your QUESTION |
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| 33. |
Convert into mole of 20g of water. |
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Answer» Answer: Hope this HELPS! If it does, PLEASE mark it brainliest! Thanks :D
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| 34. |
A. The size of colloidal particles liesbetween-a. 10-10 m and 10-mb. 10-9 m and 10-6 mc. 10 m and 104 md. 10-5 m and 10-2m |
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Answer» Answer: |
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| 35. |
How formula unit mass can be calculated??? |
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Answer» Answer: FORMULA unit mass is the sum of the ATOMIC MASSES of all atoms PRESENT in a formula unit of a compound. It is calculated by adding the atomic masses of all the atoms present in one formula unit. ... Formula unit mass of NACL is = 23+35.5=58.5u. |
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| 36. |
Calculate molar mass of NaHCO3. |
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Answer» Molar mass of NaHCO3 = 23 + 1 + 12 + (16)×3 = 36 + 48 = 84 amu . . . THNKS!☺️ |
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| 37. |
What is called electron ,proton and neutron |
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Answer» ELECTRON are ELECTRICALLY Negative Proton are Electrically Positive Neutron are Electrically Neutral No of Proton = No of Electron = ATOMIC Number No of proton + No of Neutran = Atomic wright |
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| 38. |
Draw cis and trans isomers of hex 2 ene which isomers have higher boiling point and why |
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Answer» Answer: mark as brainliest and follow me plz Explanation: Cis - FORM is more polar form than TRANS form {due to this cis -form has higher dipole moment than trans - form . we know, the boiling point depends upon dipole - dipole INTERACTIONS. The boiling point of cis - isomer is GREATER than that of trans - isomers, due to greater dipole- dipole interactions in cis - form. |
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| 39. |
What can be done to increase electricalconductivity |
Answer» Answer:Increase electrical CONDUCTIVITY.TO increase the electrical conductivity ,we have to decrease the RESISTANCE of the given CONDUCTOR.Explanation: By decreasing the resistance, the flow of ELECTRONS in conductor become smooth and fast |
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| 40. |
How to convert tertiary butyl alcohol to isopropyl alcohol |
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Answer» Answer: refer to attachment hope it is HELPFUL... |
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| 41. |
Element P Q R SMass NO. 12 20 23 35No. of neutron 6 10 12 18a) write electronic configuration and atomic numberb) which of these is chemically inertplease explain how to solve |
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Answer» (a) Atomic NUMBER (Number of protons) : P = 6 (12-6) Q = 10 (20-10) R = 11(23-12) S = 17(35-18) Electronic CONFIGURATION : P = 2,4 Q = 2,8 R = 2,8,1 S = 2,8,7 (B) Note from above part that the compound Q has a configuration of 2,8 which has all shells FILLED and thus the compound Q is inert. Hope it helps. Mark as branliest. |
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| 42. |
Name four steps for air conservation |
Answer» hey mate here is ur ANS :-steps fir air conservation are :-Reduce your heating NEEDS by making your HOUSE more energy efficient. Reduce your heating needs by making your house more energy efficient. Avoid burning leaves, trash, and other materials. Reduce your heating needs by making your house more energy efficient. Avoid burning leaves, trash, and other materials.use hand-powered garden tools Reduce your heating needs by making your house more energy efficient. Avoid burning leaves, trash, and other materials.use hand-powered garden toolsReduce or eliminate FIREPLACE and wood stove use. hopes it's helps uh dear!!!!!!!!❤️ |
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| 43. |
(iv) Identify complex ion in which effective atomic number ofthe central metal ion is 35.(Given At. number of Co = 27, Fe = 26, Zn = 30)(a) [Zn (NH2),12+(b) [Fe(CN)(c) [Fe (CN);}}(d) [Co (NH,-4- |
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Answer» The OPTION (d) is correct. CO(NH3)6 Because 27 + 8 = 35 Here, Co = 27 NH3 = 8 Hope it helps. Mark as branliest. |
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| 44. |
Identify synthetic polymer among the following answer option a. linen b. jute c.silk d.terylene |
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| 45. |
Chemistry class 9 chapter 3 atoms and molecules all formules |
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| 46. |
(b)ORA solution containing 0.5 g of KCl dissolves in 100 g of water and freezes at -0.24°C.Calculate the degree of dissociation of the salt. (K for water-1.86") |
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Answer» Answer: kinetic formula USE the QUESTION o.5 g DISSOLVES 100G WATER and grease at o.24℃. answer=20.78℃ |
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| 47. |
Name the following what are the main natural sources of Ankane? |
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Answer» Answer: The alkanes are isolated from natural gas and petroleum. Natural gas contains MAINLY methane, with SMALLER AMOUNTS of other low‐molecular‐weight alkanes. Petroleum, which is a COMPLEX mixture of many compounds, is the main SOURCE of all other alkanes. Explanation: |
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| 48. |
Study these tables related to boiling pointsof different substances and humidity and answer the following questions.Table A: Boiling points of different substancesTable B: Humidity percentage in three situationsSubstanceMethanolEthanolNitric AcidWaterIodineBoiling point (°C)64.778.483100184.3Situation ASituation BSituation CHumidity>7550-75(a) Refer Table B and find out in which situation a bowl of water will evaporate away the fastest andslowest.(b) A bowl of water and a bowl of ethanol are kept inside a room. Which bowl will get empty first?c)refer table A and table B and find in which situation out of the following the substance will evaporate the faster?a)methanol in situation c b) iodine in sitation a c)nitric acid in situation a d)iodine in situation c |
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Answer» Answer: (a) Water will evaporate fastest when the TEMPERATURE is 100 DEGREE or more and SLOWEST when it is 0 degree as it will be in its frozen state. (b) The bowl containing ethanol will evaporate faster than the bowl containing water as ethanol has a lower BOILING point than water. (c) Mention situation C. But from what is provided b) & c) is not the answer Explanation: |
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| 49. |
Explain the solubility of Lif in water |
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Answer» Answer: Lithium fluoride is an inorganic compound with the chemical formula LiF. It is a colorless solid, that transitions to white with decreasing crystal size. ALTHOUGH odorless, lithium fluoride has a bitter-saline taste. Its structure is analogous to that of sodium chloride, but it is much less soluble in WATER. It is mainly used as a component of molten salts.[3] Formation of LiF from the elements RELEASES one of the highest energy per mass of reactants, second only to that of BeO. |
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| 50. |
What is born haber cycle |
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Answer» Answer: The Born–Haber cycle is an approach to analyze reaction ENERGIES. The lattice enthalpy is the enthalpy CHANGE involved in the FORMATION of an ionic compound from gaseous ions (an exothermic process), or sometimes defined as the energy to break the ionic compound into gaseous ions (an endothermic process). |
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