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. |
5 names of material noun's which can be became common noun's when s is added |
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| 2. |
Add quick lime to water in beaker and supernatant solution is taken in a beaker and red litmus Solution is added |
| Answer» 2O to MAKE Ca(OH)2Red litmus will change into blue. As calcium hydroxide is a base.Hope it MAY help u.... | |
| 3. |
Acidified potassium permanganate solution is decolourised by give reavtion |
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Answer» react with potassium manganate(VII) SOLUTION in the cold. The colour change depends on whether the potassium manganate(VII) is used under acidic or ALKALINE conditions. If the potassium manganate(VII) solution is acidified with dilute SULPHURIC ACID, the purple solution becomes colourless. |
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| 4. |
2 moles of nh3 when put into priviously evacuated vessel (1 l) ,partially dessociates into n2 and h2 .If at equilibrim 1 mole of nh3 is present the equilibrium constant is |
| Answer» OLES at t=0 2 at t=teq 2-X 3x/2 x/2 but as PER the question, 2-x =1 ---> x = 1 thus, 1 3/2 ½ equilibrium constant= [H2]3 × [N2]/[NH3]2 substituting values.. we get, equilibrium constant= 33/23 × 1/2=27/16 | |
| 5. |
Element present at the top of the reactivity series are stored under oil . Give reason? |
| Answer» CTIVITY will be DECREASED | |
| 6. |
Calculate the number of al3 ions in 0.056 g of al2 o3 |
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Answer» ar weight of Al2O3 = 102 g.102 g of Al2O3 contains6=.022X1023molecules.0.051g of Al2O3 contain X NUMBER of moleculesX = 0.051 X 6.022X1023 /102 = 0.003 X 1020X = 3 X 10201 molecule of Al2O3 contains – 2 Al+3ions. |
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| 7. |
According to molecular orbital theory which is the most stable |
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Answer» which has eight electrons in its octet i.e. the last shell is considered STABLE.oran atom which does not LOOSE,gain or share electrons is called stablehydrogen, LITHIUM are some stable ATOMS |
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| 8. |
3.011 multiply 10^23 number of n atoms calculate mass from number |
| Answer» 0 to the power 10 to the power 23 number of the term CALCULATE the mass number | |
| 9. |
Q.26 in the picture please |
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Answer» end..Here is your ANSWER..t1 is the temperature when ICE starts meltingt2 is the temperature when ice MELTS completely.HOPE that it will HELP you |
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| 10. |
What is the hall valhard zalinsky reaction? |
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Answer» l–Volhard–Zelinsky halogenation reaction halogenates carboxylic acids at the α CARBON. The reaction is named after three CHEMISTS, the GERMAN chemists CARL Magnus VON Hell and Jacob Volhard and the Russian chemist Nikolay Zelinsky |
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| 11. |
Metal hydride-nafion composite electrode with dual proton and electron conductivity |
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Answer» hydride-nafion composite electrode with dual proton and ELECTRON conductivity has been fabricated that may have applications for electrochemical storage of hydrogen. The proton conductivity of the composite electrode was measured USING electrochemical impedance spectroscopy. Its electron conductivity was calculated from measurements of dc resistance. Ambient conditions were varied to study the effect of humidification and hence degree of hydration of the electrode on proton and electron conductivity of the composite electrode. The metal hydride used was a common form of AB5 alloy made from rare earth and transition ELEMENT metals. Nafion-117 solution was employed as the source of nafion WITHIN the composite. Proton conductivities in the RANGE 0.0074 to 0.0209 S/cm were obtained, while the electron conductivities were higher, in the range 13.9 to 34.7 S/cm. It was found that the proton conductivity of the composite electrode rose with increased hydration, while electron conductivity fell. |
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| 12. |
Mention the precautions to be taken while conducting an experiment to prove acids produce ions only in aqueous solution |
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Answer» re species with pH less than 7, while bases those with pH greater than 7. Depending on the definition used - Arrhenius, Bronsted-Lowry, or Lewis - acids can be described as proton donors, or electron acceptors while bases as proton acceptors or electron donors. Using Arrhenius' definition, acids are those that produce the HYDROGEN ion when dissolved in water while bases produce the hydroxide ion.These ions, when in water, act as charge carriers and can hence conduct ELECTRICITY. Stronger acids dissociate completely and produce more of the ions. For instance, hydrochloric ACID, a strong acid, would dissociate more, and hence, conduct electricity more strongly, while ACETIC acid is a weak acid, and would conduct more weakly. The general term for substances that conduct electricity when dissolved in water is ELECTROLYTES. Acids and bases are electrolytes due to the production of hydrogen ions and hydroxide ions. |
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| 13. |
Also know, bond order is directly proportional to bond enthalpy. And bond enthalpy is directly proportional to bond strength. It means bond order is directly proportional to bond strength. |
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Answer» is CORRECT. BOND ORDER is directly PROPORTIONAL to bond enthalpy. And bond enthalpy is directly proportional to bond STRENGTH. It means bond order is directly proportional to bond strength. |
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| 14. |
Mechanism of cationic, anionic and free radical addition polymerization |
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Answer» c polymerization is a type of chain growth polymerization in which a cationic initiator transfers charge to a monomer which then becomes REACTIVE. ... Similar to anionic polymerization REACTIONS, cationic polymerization reactions are very sensitive to the type of solvent used.Free-radical polymerization (FRP) is a method of polymerization by which a polymer forms by the successive addition of free-radicalbuilding BLOCKS. Free radicals can be formed by a number of different mechanisms, usually INVOLVING separate initiator molecules. |
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| 15. |
A ionic compound, in which there is a high electroneagativity difference between aluminium and fluorine, so there is high electrostatic force in this molecule, thus the molecule exists as a high melting solidwhile sif₄, is a covalent compound, in |
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Answer» a ionic compound, in which there is a high electroneagativity difference between ALUMINIUM and fluorine, So there is high electrostatic force in this molecule, THUS the molecule exists as a high melting solid while SiF₄, is a covalent compound, in which they are WEAK vander waal FORCES thus it exists as a gas. So AlF3 is a high melting point solid WHEREAS SiF4 is a gas. |
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| 16. |
Explain atomic mass and gram atomic mass |
| Answer» OMIC MASS is the mass, ingrams, of one mole of atoms in a MONATOMIC chemical element. It is numerically equal to the relativeatomic mass (or atomic weight) ingrams. The atomic mass of an element EXPRESSED in grams is calledgram atomic mass. For EXAMPLE oxygen is 16 grams.mark as brainlist | |
| 17. |
What is the cannigaro reaction |
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Answer» nizzaro REACTION, NAMED after its DISCOVERER Stanislao Cannizzaro, is a CHEMICAL reaction that involves the base-induced disproportionation of a non-enolizable aldehyde.it is not cannigaro its cannizzaro |
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| 18. |
Please help i m new here!!seriously i want your help..it's my test today.what happen with the copper wireif it is added To the solution of ferrous sulphate?? |
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Answer» is LESS reactive that the FERROUS sulphate so their is no effect of ferrous sulphate on COPPER wire please please mark this answers as a brainliest answers please please please please please please |
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| 19. |
Simple questionwhat is the full form of IUPAC |
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Answer» International Union of Pure and APPLIED Chemistry It gives a SET of rules to generate systematic names for CHEMICAL compounds. The nomenclature is used most FREQUENTLY WORLDWIDE. |
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| 20. |
Convert Ch4 to Ch3OH with K2Cr2O7 |
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Answer» is a strong OXIDISING agent.There is a simple conversion that when an alkane is TREATED with K2Cr2O7 then, we get an ALDEHYDE. But when the reaction is controlled, we can get an ALCOHOL.CH4 + [O] ---K2Cr2O7-----› CH3OH Here, [O] is a nascent OXYGEN. The conversion takes place as followsAlkane -----› Alcohol -------› Aldehyde -------› Carboxylic acid.This takes place when we use mild oxidising agents (like CuO) and the steps are skipped by one when we use Strong oxidising agents.Thanks.Hope this helps you..!! |
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| 21. |
Maximum and minimum number of atoms present in a plane, in a molecule of respectively are |
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Answer» is the SMALLEST UNIT of ordinary matter that FORMS a chemical ELEMENT. |
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| 22. |
Action r2p half life t half is observed to be independent of the initial concentration of reaction what is the order of reaction |
| Answer» ILL ANSWER your QUESTION TOMORROW. OK don't woorry | |
| 23. |
Forests our life line write few lines on it |
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Answer» consider as our life just because that we earn MANY thing from the forest . Forest gives us timber, coal , wood, etc. Forest protect soil from soil erosion it holds the soil and prevent the erosion .Forest maintain the temperature on our earth .Forest ABSORB EXCESS carbon dioxide and release more oxygen which make us healthy .Forest is a rich source of NATURAL things .We should conserve forest for FUTURE use . It balance the ecosystem it is a shelter for many living organisms like lion , tiger, deer, and provide food to them . |
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| 24. |
A chemical compound that makes up the striking heads of match sticks is |
| Answer» ROUS sulfide is the chemical compound that ignites match HEADS. It's found in the heads of strike-anywhere matches and in the STRIP on the side of safety match boxes. Other ingredients of match heads include potassium chlorate, PHOSPHOROUS sesquisulfide, sulfur, glass POWDER, binders and fillers. | |
| 25. |
Please answer fastBest answer will get marked as brainliest |
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Answer» t SURE but it can be d |
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| 26. |
List the cause of deforestation |
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Answer» f deforestation To make more LAND available for housing and urbanizationTo harvest timber to create COMMERCIAL ITEMS such as PAPER, furniture and homes To create ingredients that are highly prized consumer items, such as the oil from palm treesTo create room for cattle ranching I hope it's help you |
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| 28. |
How do Forest help in maintaining the balance between oxygen and carbon die oxide in the atmosphere |
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Answer» are called the GREEN lungs. This is because plants in forests release oxygen through the process of photosynthesis and HELP in providing oxygen to ANIMALS for respiration. Plants consume carbon dioxide released by the animals. In this way, plants help in maintaining a BALANCE of oxygen and carbon dioxide in atmosphere.hope it helps u!!MARK as brainlist❤ |
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| 29. |
Make diagram explanation purification with formula |
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Answer» ️♦️♦️♦️Hi Mite ♦️♦️♦️♦️♦️♦️♦️^_^:-(:-(:-(:-(:-(:-(:-(:-(Your answer :-):-):-):-):-):-):-):-):-)::-):-)$$$${{{{{{{{{{. XDeutschAC CircuitsAmplifiersAttenuatorsBinary NumbersBoolean AlgebraCapacitorsCombinational LogicConnectivityCountersDC CircuitsDiodesElectromagnetismFiltersInductorsInput/Output DevicesLogic GatesMiscellaneous CircuitsOperational AmplifiersOscillatorPower ElectronicsPower SuppliesRC NetworksResistorsSequential LogicSystemsTransformersTransistorsWaveform GeneratorsHome / Filters / Passive High Pass FilterPassive High Pass FilterA High Pass Filter is the exact opposite to the low pass filter CIRCUIT as the two components have been interchanged with the filters output signal now being taken from across the resistor  Where as the low pass filter only allowed signals to pass below its cut-off frequency point, ƒc, the passive high pass filter circuit as its name implies, only passes signals above the selected cut-off point, ƒc eliminating any low frequency signals from the waveform. Consider the circuit below.The High Pass Filter Circuit In this circuit arrangement, the reactance of the capacitor is very high at low frequencies so the capacitor acts like an open circuit and blocks any input signals at VIN until the cut-off frequency point ( ƒC ) is reached. Above this cut-off frequency point the reactance of the capacitor has reduced sufficiently as to now act more like a short circuit allowing all of the input signal to pass directly to the output as shown below in the filters response curve.Frequency Response of a 1st Order High Pass Filter The Bode Plot or Frequency Response Curve above for a passive high pass filter is the exact opposite to that of a low pass filter. Here the signal is attenuated or damped at low frequencies with the output increasing at +20dB/Decade (6dB/Octave) until the frequency reaches the cut-off point ( ƒc ) where again R = Xc. It has a response curve that EXTENDS down from infinity to the cut-off frequency, where the output voltage amplitude is 1/√2 = 70.7% of the input signal value or -3dB (20 LOG (Vout/Vin)) of the input value.Also we can see that the phase angle ( Φ ) of the output signal LEADS that of the input and is equal to +45o at frequency ƒc. The frequency response curve for this filter implies that the filter can pass all signals out to infinity. However in practice, the filter response does not extend to infinity but is limited by the ELECTRICAL characteristics of the components used.The cut-off frequency point for a first order high pass filter can be found using the same equation as that of the low pass filter, but the equation for the phase shift is modified slightly to ACCOUNT for the positive phase angle as shown below. }}}}}}}$$$$$$$$£££££&&&&&&&&&&+££Hope Help your ££££££&&&&&&&&&+£££??????????????????????????????????????????????????????????????????????????????????????????? |
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| 30. |
Why chemical properties of Neptunium and plutonium resemble with uranium not all those Renium and osmium? |
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Answer» ️♦️♦️♦️Hi Mite ♦️♦️♦️♦️♦️♦️♦️^_^:-(:-(:-(:-(:-(:-(:-(:-(Your answer :-):-):-):-):-):-):-):-):-)::-):-)$$$${{{{{{{{{{.Plutonium is a radioactive chemical elementwith symbol PU and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four OXIDATION states. It reacts with CARBON, halogens, nitrogen, silicon, and hydrogen. When exposed to moist air, it forms oxidesand hydrides that can expand the sample up to 70% in volume, which in turn flake off as a powder that is pyrophoric. It is radioactive and can accumulate in bones, which makes the handling of plutonium dangerous. }}}}}}}$$$$$$$$£££££&&&&&&&&&&+££Hope HELP your ££££££&&&&&&&&&+£££??????????????????????????????????????????????????????????????????????????????????????????? |
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| 31. |
Why actinides are called inner transition element? |
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Answer» they are involve in filling inner sub shellthere ELECTRONIC configuration are f ORBITALS and f orbitals are inner transition elementsthat's why it is called inner transition ELEMENTS |
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| 32. |
How much electric charge is required to reduce 1 mol Cr2O7^2- into Cr^3+? |
| Answer» SWER just APPLY UNITARY METHOD on CHARGE | |
| 33. |
What is Hofmann rule and its examples? |
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Answer» ️♦️♦️♦️Hi Mite ♦️♦️♦️♦️♦️♦️♦️^_^:-(:-(:-(:-(:-(:-(:-(:-(Your answer :-):-):-):-):-):-):-):-):-)::-):-)$$$${{{{{{{{{{.Hofmann elimination. ... With asymmetrical AMINES, the MAJOR alkene product is the least substituted and generally the least stable, an observation known as the Hofmann RULE. This is in DIRECT contrast to normal elimination reactions wherethe more substituted, stable product is dominant (Zaitsev's rule). }}}}}}}$$$$$$$$£££££&&&&&&&&&&+££Hope HELP your ££££££&&&&&&&&&+£££??????????????????????????????????????????????????????????????????????????????????????????? |
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| 34. |
Properties of baking soda |
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Answer» um bicarbonate (Baking SODA) is a chemical COMPOUND with the FORMULA NaHCO32. It is a white solid that is crystalline but often appears as a fine powder.3. It has a slightly salty, alkaline taste resembling that of WASHING soda (sodium carbonate).4. It can be used in Pest Control.5. It is good fire extinguisher especially for ELECTRICAL fires. |
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| 35. |
Why does not Cu react with HCL even on heating |
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Answer» .GM..HERE IS UR ANSWER ...As COPPER is less REACTIVE than hydrogen, therefore it will not liberate hydrogen gas from the acids like HCl, HNO, HSO ETC. But sulphuric acid is a strong oxidising agent, therefore it will oxidise copper metal to Cu2+ ion. ... Hence it does not react withcopper metal at all.HOPE IT HELPS U... |
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| 36. |
Name the product obtain by action of alcoholic KCN on ethyl bromide |
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| 38. |
What is the volume of 7 gram of chlorine at STP ??? chlorine (35.5) |
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Answer» am OCCUPIES 22.4 LITRES so 7.1 GRAM occupies 35.5÷22.4 × 7.1 so 11.25 litres |
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| 39. |
Give the equation for the formation of copper sulphate from copper II oxide copper II oxide |
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Answer» re MANY methods to produce COPPER from copper Ⅱoxide.Such as CuO+H2SO4→CuSO4+H2O, CuSO4+Fe→FeSO4+Cu/ electrowinning the CuS04 solution, ALSO can GET copper cathode. |
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| 40. |
how is round bottom flask containing the reaction mixture kept while heating in the p preparation preparation of ammonia gas |
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Answer» the REACTED water does not TRICKLE down into heated FLASK and thus BREAK it |
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| 41. |
How is ammonia gas collected |
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Answer» Collect Ammoniais necessary because water vapor is ONE of the products formed ammonia. gas being highly soluble in water has to be dried quickly to PREVENT it from dissolving dry. ammonia gas being lighter than air is collected in the INVERTED gas jar by the DOWNWARD displacement of air calcium.HOPE IT HELPS pls Mark me as BRAINLIEST ✅✅ |
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| 42. |
Please answer fast I will Mark u as brainliest |
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Answer» iron nail is dipped in copper sulphate solution, it is observed that a brown coating of copper is formed on the surface of iron and the COLOUR of copper sulphate solution changes from BLUE to light green. This reaction happens because iron is more reactive than copper and it displaces copper from its solution and iron passes into solution as FE2+ ions and ferrous sulphate solution is formed. The chemical equation representing this reaction is as follows - Fe(s) + CUSO4(aq) -> CU(s) + FeSO4(aq).please mark me as a brainlist |
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| 43. |
An element X has valency of 4. write the chemical formula for bromide and oxide of the element |
| Answer» WER of your QUESTIONS is CBr4and CO2 | |
| 44. |
Reaction of soda type extinguisher |
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Answer» acid EXTINGUISHER was patented in the U.S. in 1881 by Almon M. Granger. His extinguisher used the reaction between sodium bicarbonate solution and sulfuric acid to expel pressurized WATER onto a FIRE. A VIAL of concentrated sulfuric acid was suspended in the cylinder.THANK YOU |
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| 45. |
Answer the iupac name |
| Answer» OU for your TIME and CONSIDERATION and I | |
| 46. |
Ezplain trends in modern periodic table |
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Answer» of modern periodic table are as follows:-(1):-. ACROSS THE GROUP. DOWN THE GROUPATOMIC SIZE. DECREASES. INCRESESVALENCY. FIRST INCREASE FROM. REMAINS SAME 1TO4 AND THEN DEC TO 0.METALLIC CHARACTER. DECREASES. INCREASESNON METALLIC CH. INCREASES. DECREASESPLZ MARK ME AS BRAINLIEST IF YOU SATISFIED BY MY ANSWER.BEST REGARDS. |
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| 47. |
Photophobic CH4+HCl -------------------------->________ dark room In light CH4+HCl --------------------------->________ Sunlight Complete both reaction |
| Answer» REACTION is occur2nd ~ch3cl+h2 GAS is RELEASED | |
| 48. |
the electrical conductivity of acetic acid is less in comparison of the electrical conductivity of dil.sulphuric at the same concentration.. give reason |
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Answer» C® Electrically conductive and static dissipative carbon black compoundsCarbon black has established it’s position as the most widely used electrically conductive filler. Carbon black offers superior price-performance ratio and stable properties over the time. Typically carbon black compounds’ surface RESISTANCE range settles between 102 Ω (100 ohms) and 105 Ω (100 kohms). Due to the nature of carbon black, reaching a dissipative surface resistance levels above 105 Ω is a challenging task. PREMIX has successfully overcome this challenge with special resistance control technology and offers static dissipative PRE-ELEC®compounds between 105 Ω and 108 Ω.Boost your business with electrically conductive concentratesCarbon black concentrates are an excellent way to reduce the raw material costs. In PRE-ELEC® concentrates, the carbon black content has been optimized to the highest possible level. When striving for maximum cost efficiency, recycled plastics or regrind from your own process can be used for dilution of concentrate. One small, yet innovative step can LEAD to significant cost savings.Besides the economical advantages concentrates also allow the modification of product properties. To IMPART stiffness and strength to the finished product, the reinforced plastic can be used for dilution. One may also modify the flame retardant properties by INCLUDING a flame retardant masterbatch in the process.I think it is helpful to you so,plz MARK ME AS BRAINLIEST |
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| 50. |
A metal oxide has the general formula MxOy. Knowing in oxide has y = 1.5x and the molar mass of oxide is 2 times the molar mass of tri oxide sulfur. Find the chemical formula of oxide |
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Answer» ou for your TIME and consideration and I will be in the ATTACHED file is SCANNED IMAGE in PDF format you darling pls FIND the attached file is scanned image in PDF format you darling pls find |
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