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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 46351. |
The compound in which carbon was only its sp3 hybrid orbitals for bond formation is(1 HCOOH (2) (NH2), co(3) CCHE),COH (4) (CH ₃ ) ₂ CHO |
| Answer» 4 NUMBER is RIGHT ANSWER | |
| 46352. |
For a first order reaction, if the time taken for completion of 50% of the reaction is t second, thetime required for completion of 99.9% of thereaction is:(1) 10t(2) 5t(3) 100t(4) 2t |
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Answer» 10tExplanation |
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| 46353. |
Coleslate screning constant and effective nuclecie chargeforop electron of cu of magnesium. |
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Answer» vczhdysutdugsuifsuffsyyswwwwwiawsfykpllkp |
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| 46354. |
Solve this question from inorganic chemistry ( reaction of alkene with halogen) |
| Answer» ANSWER is 1,2 diabromocyclohexzen | |
| 46355. |
when NH3 combines with HCl, NH4Cl is formed with dense white fumes.Where does the ring first forms and Why? |
| Answer» EXPLANATION:YO | |
| 46356. |
Two first order reaction have half-lives in the ratio 8: 1. Calculate the ratio of time intervalst:ty. The time t, and t, are the time period for25% and 75% completion.(1) 1:0.301(2) 0.125:0.602(3) 1:602(4) 1 : 0.602 |
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Answer» Option (3) is the correct ANSWEREXPLANATION:PLEASE mark me as the BRAINLIEST answer |
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| 46357. |
Molecular hydride isa] Naho] H2sc] LaHd) KH |
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Answer» Molecular hydrides are formed by the combination of elements of comparatively HIGHER ELECTRONEGATIVITY. These BONDS are mostly covalent in character with partly ionic character too .The general formula for covalent hydrides is XH. Examples of molecular hydrides are: H2O, HF, PH3 |
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| 46358. |
Covalent compounds are non conducters of electricity in solids, moltan state and aqueous state. |
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Answer» h solid ionic compounds do not conduct ELECTRICITY because there are no free mobile ions or electrons, ionic compoundsdissolved in water make an electrically conductive solution. ... THEREFORE, they have HIGHER MELTING and boiling points compared to COVALENT compounds. |
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| 46359. |
WhyCu2+ ion is paramagnetic while Zn2+ is diamagnetic? |
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Answer» s an unpaired electron (its configuration is [AR] 3d9), whereas Zn2+ has all PAIRED electrons (configuration [Ar] 3D10). PAIRING electrons leads to DIAMAGNETISM, and unpaired electrons leads to paramagnetism. |
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| 46360. |
Given : BaF,(s)–Ba? (29)+2F (aq) : K=1.0x10-8°HF(a)=H(aq)+F (aq) :K, =65x10MThe value of K, for Baf, ()+ 2H+ (aq)=Bat? (aq) + 2HF(aq) is: |
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Answer» hwthsyktwjgwjtfwjqrnwgmegmegmeguqrjwtjqrjtwjwtmegjeykk6 |
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| 46361. |
For a hypothetical reaction, aA + bB → product, the rate law is r = k[A] [B]" then :(1) (a + b) = (x + y)(2) (a + b) (x + y)(3) (a + b) > (x + y)(4) (a + b) may or may not be equal to (x + y) |
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Answer» Option (D) is correct.The VALUE of rate LAW can be grater,EQUAL or smaller than the molecularity. |
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| 46362. |
We come to know what is being cooked in the kitchen even without going there interpret this |
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Answer» by the SMELL of foodExplanation:MARK ME AS BRAINLIEST and FOLLOW ME |
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| 46363. |
Decomposition of NH, on the surface of tungsten is a reaction of:(1) Zero order(2) First order(3) Second order (4) Fractional order |
| Answer» 4) FRACTIONAL ORDER is the CORRECT ANSWER | |
| 46364. |
Mass of NaOH that must be added to water to prepare 500 mL of 2 M aqueous solution is ? |
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Answer» 40gmExplanation:MOLARITY (M) : The number of moles of a solute DISSOLVED in 1 L (1000 ml) of the SOLUTION is known as the molarity of the solution.Molarity of a solution(M) = moles of solute (n) / Vol. of solution(LTR)2 = n/0.5n = 1 and moles(n) = GIVEN mass(m) / molar massn = 1 = m/40so w=40gm.Amount of sodium hydroxide present in 500ml of 2M solutions is 40 gm. |
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| 46365. |
II. Fill in the blanks with appropriate words: 1. The gases present in air separated byliquefying air and thentheliquid air.2.A mixture in which the constituents aredistributed uniformly is calledmixture.3. Pure substance havemelting and boiling points.4. Any ....... is a homogeneousmixture of solute and solvent.5...... is a mixture ofcarbohydrates, fats, proteins and minerals inwater.60 |
| Answer» 1. mixed2. solid3. HIGH4. pumped5. BALANCE dietExplanation:please FOLLOW me | |
| 46366. |
Most reacting halogen is |
| Answer» MARK me the brainliestExplanation:FluorineFluorine is the most reactive ELEMENT of all in Group 7. You can see the trend in REACTIVITY if you react the HALOGENS with iron wool.and follow me and I will follow you I promise | |
| 46367. |
Why Cuis paramagnetic and anat isDiag Diamagnetic |
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Answer» hvjs sjs sisbdod DJD is sis sis sis sis shs ms s s SS SUS SEHS eehevwjebkejeiehehejejjejee. |
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| 46368. |
In the following reaction AB+ C, rate constant is 0.004 Ms. If we start with 5 M of A thenconc. of B and A after 10 minutes are respectively(1) 2.6 M, 2.4 M (2) 2.4 M, 2.6 M(3) 1.4 M, 1.6 M (4) 1.6 M, 1.4 M |
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Answer» In the following reaction AB+ C, RATE constantis 0.004 Ms. If we start with 5 M of A thenconc. of B and A after 10 minutes are respectively(1) 2.6 M, 2.4 M (2) 2.4 M, 2.6 M(3) 1.4 M, 1.6 M (4) 1.6 M, 1.4 M |
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| 46369. |
Fill in the blanks:Metal possess high density except.........and it.........on water. |
| Answer» METALS are SOLIDS under normal CONDITIONS except for Mercury. ... IRIDIUM and osmium have the highest densities where as ... Metal oxide + water -> metal HYDROXIDE. | |
| 46371. |
Which of the following will not affect the value of rate constant of a reaction :(A) Change in concentration of the reactants(B) Change in temperature(C) Change in pressure(D) Addition of catalyst(1) A, B, C, D(2) only A, B & C(3) only A, B & D (4) only A & C |
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Answer» When the reaction is endothermic reversible, the increase in temperature INCREASES the VALUE of the EQUILIBRIUM CONSTANT and when the reaction is EXOTHERMIC reversible, increase in the temperature decreases the value of the equilibrium constant....make me as brainlist |
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| 46372. |
For the reaction A + B + C + D, the following observations were made:(i) When the concentration of A was doubled,the rate of formation of D was doubled(ii) When the concentration of B was halved, therate of formation of D becomes one fourth(ii) Doubling the concentration of C has no effecton rateSelect the correct statement(1) Rate eqn r = k[A] [B]"/2(2) Reactant C must involve in rate determining step(3) Only A & B participate in the rate determining step(4) Order of C is 1 |
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Answer» ur answer is option C is the CORRECT answer. Explanation:I hope it will help u. & follow me ,brainliest my answer OK dearest...... |
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| 46373. |
Aap ka dost apne jeb kharch ki jama shoda raqam se infaq karna chahta hai aap is ko teen nokat ease batain jis se oska ajar zaya hone se bach jai |
| Answer» BRO........ SORRY but what you are ASKING isn't CLEAR | |
| 46374. |
Nitryl fluoride an explosive compound, can be made by treating nitrogen dioxide with fluorine as2NO2(g) + F2(g) → 2NO,F(g)Determine the rate law for this reaction using thedata in the following table :Exp. No.[NO] (M) [F] (M) Initial Rate(M/s)0.001 0.005 2.0 * 104b0.002 0.0054.0 * 1040.006 0.002 4.8 x 104d0.006 0.0049.6 x 101(1) Rate = k[NO] [F] (2) Rate = k[NO] [F]>(3) Rate = k[NO] [F] (4) Rate = k[NO] [F] |
| Answer» 4I HOPE USEFUL thanksbalaram BALARAM | |
| 46375. |
When 134.4 L of H2 combines with 89.6 L of O2 at STP then the number of moles of H2Oformed is ? |
| Answer» 6 MOLES of h2oExplanation:134.4/22.4=6molethen 6 moles of h2omark it as BRAINLIEST PLZ | |
| 46376. |
III. Write true or false : 1. Mixture is a pure substance.LF2. Alloys are homogeneous mixtures of two ormore non-metals.3. Substances which is dissolved is known assolute.4. Gases present in air can be separated byphysical means.5. Sea water is a mixture of salts and water.Methods of Separating Mixtures |
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Answer» 1.TRUE 2.FALSE 3.TRUE4.FALSE5.TRUE |
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| 46377. |
दर निर्धारित को समझाइए |
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Answer» tion:A fixed RATE is an INTEREST rate that STAYS the same for the LIFE of a loan, or for a portion of the loan term, DEPENDING on the loan agreement. |
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| 46378. |
56 g of N2 reacts 9 g of H2 in a closed vessel to form NH3. how much N2 is left? |
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Answer» ANSWERGiven: The reaction is N 2 +3H 2 ⇄2NH 3 56g6g27.5kg INITIAL no. of moles of H 2 = 26 =3molN 2 = 2.856 =2molInitial number of moles 2N 2 + 33H 2 ⇄02NH 3 At EQUILIBRIUM, (2−x)(3−3x) 2x∴ Number of moles of NH 3 = 1727.54 =1.62i.e. 2x=1.62x=0.81∴ At equilibrium,No. of moles of N 2 =2−x=2−0.81=1.19No. of moles in H 2 =3(1−x)=3(1−0.81)=0.57∴ Equilibrium concentration of ,[N 2 ]= 11.19 =1.19M[H 2 ]= 10.57 =0.57M[NH 3 ]= 11.62 =1.62M∴ Equilibrium constant,K C = [N 2 ][H 2 ] 3 [NH 3 ] 2 = 1.19×0.57 3 1.62 2 =11.9≈12mol 2 lit 2 Answered By |
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| 46379. |
Which of the following molecule does not show resonanceОНСОО"0 BenzeneO Clo,OHCl |
| Answer» RESONANCE is shown by the molecules which have these type of system:--Adjacent double BOND and positive charge-Adjacent double bond and negative charge-Adjacent lone PAIR and double bond- Adjacent double bond and free radical-Two adjacent double bond-Adjacent lone pair and positive charge.NH 3does not have any such kind of system where resonance is possible.Explanation:have a NICE DAY ✌️✌️ | |
| 46380. |
Calculate the amount of water produced by the combustion of 16 g of methane... btw I found out @palakmishra017....this is her new id....if u haven't followed her...what are u waiting for....go and follow her fast...palli pali~~ |
| Answer» ACCORDING to the above equation, one mole of CH4 (16 g) on combustion GIVES one mole of carbon DIOXIDE and 2 moles of WATER and 2 moles of water = 2 x [2 + 16] = 36 g of water | |
| 46381. |
II. Fill in the blanks with appropriate words: 1. The gases present in air separated byliquefying air and then... theliquid air.sol2. A mixture in which the constituents aredistributed uniformly is calledmixture.farCO :3. Pure substance havemelting and boiling points.4. Anyis a homogeneousmixture of solute and solvent.fac5.is...... is a mixture ofcarbohydrates, fats, proteins and minerals inwater.thol |
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Answer» nguniformsharply definedsolutionnutrients |
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| 46382. |
An atom of copper has a mass of 1.0625 ×10-22g how many atoms of copper are there in 16g [CU =63.5u] |
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Answer» No of ATOM =1.0625×10^22/6.022×10^23×12 |
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| 46383. |
the radius of hydrogen atom in the ground state is 52.9 pm. the radius of the first excited state of he+ ion will be |
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Answer» The radius of first Bohr orbit of hydrogen atom is 0.529 A. Calculate the radii of (i) the third orbit of He+ ion and (ii) the SECOND orbit of Li2+ ion. Other Lessons for You. 1.1 SOME DEFINITIONS (a) Distance: Distance between two points is the LENGTH of actual path TRAVELLED by the particle.Explanation:HOPE it helps you mark me brainliest as i wanna be genius |
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| 46384. |
An atom of copper has a mass of 1.0625 ×10-22g ho |
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Answer» 1.625Explanation:the 1.0625×10-2gfor 10 the 0 invisiblefor ANSWER =1.625 |
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| 46385. |
In which of the following maximum amount of heat is released if one mole of each reactant is taken?(1) H2SO + NaOH (2) HCI + NaOH(3) HF + NaOH (4) CH,COOH + KOH |
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Answer» 4 optionExplanation:CHECK ∆H of CH3COOH = 1100kcal which is GREATER than all components.Remember Ok! HAPPY LEARNINGMARK AS BRAINLIEST ANSWER VOTE MEGOOD JOB |
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| 46386. |
A solution is prepared by adding 2 g of a substance A to 18 g of water. calculate the mass per cent of the solute. |
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Answer» -• MASS of SOLUTE, A = 2 g.• Mass of solvent (water) = 18 gTo Find :-• Mass % of solute, A Solution :-At FIRST, we NEED to find mass of solution. Mass of solution = Mass of solute + Mass of solvent = 2 g + 18 g= 20 g━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ |
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| 46387. |
A mixture of CaCO3(s) and NH4HS(s) is heated upto constant mass, if vapour densityof gases evolved is measured and found tobe 95/6 then the % by moles of CaCO3 ininitial mixture will be :-CaCO3(s) - - Cao(s) + CO2(g)NH4HS(s) – – NH3(g) + H2S(9) |
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Answer» fyijgjklExplanation:tilbnl.................hlkglhcllhhklcvvbgoihgggljghlotdf6ocseeuk |
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| 46388. |
Two moles of a perfect gas undergo the following process: (a) a reversible isobaric expansion from (1.0 atm, 20.0 L) to (1.0 atm, 40.0L).(b) a reversible isochoric change of state from (1.0 atm, 40.0 L) to (0.5 atm, 40.0L).(c) a reversible isothermal compression from (0.5 atm, 40.0 L) to (1.0 atm, 20.0L).(i) Sketch with labels each of the processes on the same P-V diagram.(This part is optional)(ii) Calculate the total work (w) and the total heat change (q) involved in the above processes.(iii) What will be the values of ∆U, ∆H and ∆S for the overall process ?Plz don't spam.Need detailed explanation |
| Answer» XF Alfonzo DLL SKULL REDNECK | |
| 46389. |
Draw the structure of 12-crown-4 and 15-crown-5. Explain their use in separation of alkali metals? |
| Answer» TION:I HOPE so this answer will help you stay safe be happy e keep smiling and don't FORGET to you make me in the BRAIN list | |
| 46390. |
The number of moles of lead nitrate needed to coagulate 2 moles of colloidal Agl/I is :(1) 2(2) 1(3)1/2(4)2/3 |
| Answer» OPTION is (2) 1 | |
| 46391. |
Explain the use of 12 crown 4 in separation of alkali metals |
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Answer» All the alkali cations have a charge of +1 and, except for lithium, are ... centre of an 18-crown-6 ring (18 ATOMS in the ring, 12 of which are carbon atoms ... The USE of a cobaltinitrite SOLUTION permits separation of potassiumExplanation: |
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| 46392. |
At a certain angle of incidence, the refracted ray does not come out but grazes theinterface separating air and glass. Measurethe angle of incidence for this situation. Thisangle of incidence is known as. |
| Answer» EXPLANATION:Now SEND light from the curved side of the SEMICIRCULAR glass disc. ... and measure the angle of refraction we will observe that at a certain incident angle the refracted ray does not come out but grazes the interface of incidence separating air and glenn is KNOWN as critical angle. | |
| 46393. |
The tyre of automobio is inflatten to dlightly lesser pressure in summer than winter?? |
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Answer» he PRESSURE of the AIR in the tube of the tyre is LIKELY to tbe quite high as compared to winter. It is quite likely that the tube may burst under high pressure in summer. Therefore, its is advisable to INFLATE the tyres to lesser pressure in summer than in winter. |
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| 46394. |
B. Give one-word answers. 1. By which more is heat transferred in solids?2. Are most metals good or bad conductors of heat?3. By which more is heat transferred in liquids?4. Name a liquid which is a good conductor of heat.5. When you heat water in a pan, by which mode does most of the heat travel in water-conduction, convection or radiation?6. In which mode of transfer of heat does the medium not get heated up?7. Which is the fastest mode of transfer of heat?8. Are gases good conductors or insulators of heat?9. Which objects absorb more radiant heat-dark-coloured objects or light-coloured objects?10. What is created in the double-walled vessel in your thermos flask that keeps your tea hot?give one word answer |
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| 46395. |
Physics ChemistryMathematicsQuestion 25 of 60Q 25. The value of Planck's constant is 6.63 x 10-34]s. The velocity of light is 3.0 x 108 ms-1. whichvalue is closest to the wavelength in nanometers of a quantum of light with frequency of 8 x 10155-1?Oa) 3 x 107Ob) 2 x 1025Oc) 5 x10-18Od) 4 x 101ani: GTarMark for Review 2. NextClear ResponseSave & Next3. 200javascript:void(0)essubscribersSUBSCRIBEVIENREI. UU.50+PILLOWYouTubeNAype here to searchOEt e |
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Answer» Sorry DEAR I can't understand your QUESTIONEXPLANATION:PLS FOLLOW me |
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| 46396. |
The following concentrations were obtained for the formation of NH3from N2 and H2 at equilibrium at 500K. [N2]=1.5×10^−2M,[H2]=3.0×10^−2M and [NH3]=1.2×10^−2M. Calculate equilibrium constant. |
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Answer» -•[H₂] = 3.0 × 10⁻² M.•[N₂] = 1.5 × 10⁻² M.•[NH₃] = 1.2 × 10⁻² M.To Find :-• Equilibrium constant, SOLUTION :-GIVEN REACTION, ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━⠀⠀⠀⠀⠀⠀⠀ |
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| 46397. |
CH3-CH2-CN WITH SOLUTION |
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Answer» Molecular FormulaC3H5N or CH3CH2CNMolecular Weight55.08 g/molPropionitrile APPEARS as a colorless liquid with an ether-like ODOR. Density 0.683 g / cm3. Flash point 61°F. Toxic by INHALATION, skin absorption, and ingestion. Vapors are heavier than AIR. Used as a SOLVENT, and to make other chemicals. |
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| 46398. |
Select incorrect statement : (1) Micelles are associated colloids(2) The electrical charge on a colloid particle isindicated by electrophoresis(3) Formation of micelles takes place above krafttemperature(4) Formation of micelles take place below CMC |
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| 46399. |
The number of waves in the fourth orbit of H atom is |
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Answer» 3Explanation:The number of waves made by an electron in any orbit is equal to the PRINCIPAL quantum number. So the number of waves in 3rd orbit of H ATOM aremark me beainliestand FOLLOW MEPLEASE |
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| 46400. |
Arrange the following electrolytes in the increasing order of coagulation power for the coagulation ofAs, S, sol:(1) K SO, < CaCl, < Na, PO, < Aici,(2) K SO, = Na PO, < CaCl, < AICI(3) Na PO, |
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