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e this STATEMENT is false.because ATOMIC NUMBER refere to the no. of atoms not the number of PROTONS and electrons present in the nucleus.hope it helps youMark my answers as brainlist

tion:Chemistry is the STUDY of matter, its properties, how and why substances combine or SEPARATE to form other substances, and how substances INTERACT with energy. ... Chemistry is one of the physical SCIENCES that help us to describe and explain our world

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NSWERThe REACTION for the oxidation of MANGANATE ion to PERMANGANATE ion can go to completion by removing hydroxide ions by adding CO2.ANSWERThe reaction for the oxidation of manganate ion to permanganate ion can go to completion by removing hydroxide ions by adding CO2.CO2+2OH−→CO32−+H2O.ANSWERThe reaction for the oxidation of manganate ion to permanganate ion can go to completion by removing hydroxide ions by adding CO2.CO2+2OH−→CO32−+H2O.Hence, the CORRECT OPTION is C.

u can use baking powder to make FRESH HOMEMADE CAKES and many more

ab=a+bThis is an example of decomposition reactionDecomposition reaction is ALSO known as the OPPOSITE of COMBINATION reaction.For ex: CaCo3=Cao+Co2Hope it HELPS you..

Let the speed of the boat in still water be x km/hr and the speed of the stream but y km/hr. Then,Speed upstream =(x−y)km/hrSpeed downstream =(x+y) km/hrNow, Time taken to cover 32km upstream = x−y32 hrsTime taken to cover 36 km downstream = x+y36 hrsBut, TOTAL time of journey is 7 hours.∴ x−y32 + x+y36 =7 ..(i)Time taken to cover 40KM upstream = x−y40 Time taken to cover 48 km downstream = x+y48 In this case, total time of journey is given to be 9 hours.∴ x−y40 + x+y48 =9 (ii)PUTTING x−y1 =u and x+y1 =v in equations (i) and (ii), we get32u+36v=7⇒32u−36v−7=0 ..(iii)40u+48v=9⇒40u−48v−9=0 ..(IV)Solving these equations by cross-multiplication, we get36×−9−48×−7u = 32×−9−40×−7−v = 32×48−40×361 ⇒ −324+336u = −288+280−v = 1536−14401 ⇒ 12u = 8v = 961 ⇒u= 9612 and v= 968 ⇒u= 81 and v= 121 Now, u= 81 ⇒ x−y1 = 81 ⇒x−y=8 ..(v)and, v= 121 ⇒ x+y1 = 121 ⇒x+y=12 ..(vi)Solving equations (v) and (vi), we get x=10 and y=2Hence, Speed of the boat in still water =10 km/hrand Speed of the stream =2km/hr.

THE FUMES OF THE INCENSE STICK GO UP BECAUSE HOT AIR RISES UP .PLEASE MARK MY ANSWER BRAINLIEST

I THINK it's 4TH OPTION

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When calcium oxide is added to WATER it forms calciun HYDROXIDE CALLED slaked lime. The REACTION between water and CaO is an exothermic reaction. Heat is released during exothermic reaction ,rise in temperature is observedExplanation:......

ur question...10thChemistryChemical reactionsTypes of chemical reactionsCalcium carbonate decompose...CHEMISTRYCalcium carbonate decomposes on heating to give calcium oxide and carbon dioxide. How much volume of CO 2 will be obtained at STP by THERMAL decomposition of 50 g of CaCO 3 ?December 26, 2019avatarDerrick ReddyShareSaveANSWERChemical reaction involved is:CaCO 3 →CaO+CO 2 Molar mass of CaCO 3 =40+12+16×3=100 gAccording to the balanced reaction 100 g of CaCO 3 produces 1 mol of CO 2 i.e. 22.4 L at STP.∴50 g CaCO 3 will produce 10022.4 ×50=11.2 L CO 2 at STP.December 26, 2019avatarTopprSHAREAsk your doubt through WhatsApp nowTRY NOWPractice important QuestionsNCERT Solutions for Class 11 Chemistry Chapter 1 Fingertips133 QsSolve RELATED QuestionsWhich type of chemical decomposition reaction is the following reaction?Cu(OH) 2 heat CuO+H 2 O1 Verified AnswerWhen lead NITRATE is heated, it breaks down into lead monoxide, nitrogen dioxide, and oxygen2Pb(NO 3 ) 2 →2PbO+4NO 2

According to Bohr, Paschen series is obtained, when an electron jumps to the THIRD orbit (n1 = 3) from any OUTER orbit (n2 = 4, 5, 6, ...). Brackett series series is obtained when an electron jumps to the FOURTH orbit (n1 = 4) from any outer orbit (n2 = 5, 6, 7, ...).Explanation:please mark as branlist

Explanation:In electrolytic refining of copper, the common elements present in ANODE MUD are selenium, tellurium, silver, gold, PLATINUM, and antimony. These elements are very less reactive and are not affected during the PURIFICATION process. HENCE, they settle down below the anode as anode mud.

The bonds in a methane (CH4) molecule are formed by four separate but equivalent orbitals; a SINGLE 2S and three 2p orbitals of the carbon hybridize into four SP3 orbitals. ... In a water molecule, two sp3 hybrid orbitals are occupied by the two LONE pairs on the oxygen ATOM, while the other two bond with hydrogen.Explanation:please mark as branlist

also known as acid TEXTURING. It is a chemical PROCESS which makes the surface of the SOLAR cell rough. In a solar cell manufacturing INDUSTRY it is the first process for cell making. It makes the cell rough to occur diffuse reflection. That's why sun rays will be more absorbed by the cell & hence it's efficiency will INCREASE.

hєчα mαtєThe following experiment SHOWS that water and oxygen are REQUIRED for RUST to occur with iron. No rust. Boiled water has no oxygen and oil stops new oxygen entering. ... Salt water is an electrolyte which conducts ions, SPEEDING up rusting.mαrk αѕ вrαnlíѕt

Metals are dense, shiny, good conductors of HEAT and electricity, and easily lose electrons in chemical REACTIONS. Nonmetals are not dense, dull, do not conduct heat and electricity, and tend to gain electrons. METALLOIDS are elements that have properties of both metals and nonmetals.

In chemistry, the law of definite PROPORTION, sometimes CALLED Proust's law, or law of constant composition states that a given CHEMICAL compound ALWAYS contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.Explanation:Please MARK me as a brain list

Wheat flourb) Milkc) Inkd) COMMON Saltii. You have to ADD the WATER in each given sample and stir properly using a spoon. Are the particles in the mixture visible?iii. Direct a beam of light by torch through the each glass tumbler and observe from the front. Was the path of the beam of light visible?iv. Leave the mixture undisturbed for few minutes. Is the mixture stable or do the particles begin to SETTLE after sometimes

it is VISIBLE in the SOLUTION  of COMMON SALT EXPLANATION:

1M glucose=1M urea<1M NaCl<1M Na2SO4Explanation:as i(EXTENT of dissociation) for glucose and urea is 0 , for Nacl is 1 and for NA2SO4 is 3

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Wheat flourb) Milkc) Inkd) Common Saltii. You have to ADD the WATER in each given sample and stir properly using a spoon. Are the particles in the mixture visible?iii. Direct a beam of light by torch through the each GLASS tumbler and observe from the front. Was the PATH of the beam of light

Chromatography technique that uses paper sheets or strips as the ADSORBENT being the stationary PHASE through which a solution is made to pass is called paper chromatography. It is an inexpensive method of separating DISSOLVED chemical substances by their different migration rates ACROSS the sheets of paper.

is the CORRECT ANSWER

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The hydrogen FLUORIDE (HF) molecule is polar by virtue of polar covalent bonds; in the covalent bond, ELECTRONS are DISPLACED toward the more electronegative fluorine ATOM. The polar covalent bond, HF.I hope it may help you.Please MARK me as BRIANLIEST.

The HYDROGEN fluoride (HF) molecule is POLAR by virtue of polar covalent bonds; in the covalent bond, electrons are DISPLACED toward the more ELECTRONEGATIVE FLUORINE atom. The polar covalent bond, HF.30thx+follow=inbox ✌ Follow meeee

mark me brainliest and follow me2.1 Definitions:Melting point: temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached.Boiling point: temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the VAPOR of the liquidDistillation: Distillation is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation.Physical change: It is the change in the physical state (either solid liquid or gas of the substance)Chemical change: chemical reaction involving the rearrangement of the ATOMS of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substanceNeutralization: It is the reaction of an equally strong acid with an equally strong base, forming a neutral compound and waterEndothermic reaction: The reaction in which Heat or energy must be supplied in order to proceed the reactionExothermic reaction: The reaction in which heat or energy is liberated after the reaction takes placeCombination reaction: It is the reaction in which two or more reactants combine together to form a productDecomposition reaction: It is the reaction in which one REACTANT decomposes into two or more productsDisplacement reaction: It is the reaction in which an element of higher reactivity DISPLACES another element of lower reactivity2.2 Questions:Physical changes examples: Melting of iceMelting of buttervaporization of watercutting of paperMelting of ice- popsChemical changes examples:Rustingcorrosionburning of paperDigestion foodpreparation of food substancesLook at the attachment for reactivity seriesEvolution of gas:Zn + 2HCl = ZnCl₂ + H₂ (gas)PCl₅ (on heating) = PCl₃ + Cl₂ (gas)Change in color:2KMnO₄ (deep purple) + 5HCOO-COOH + 8HCl = 10CO₂ + MnCl₂ (colorless) + 4H₂OCuSO₄ (anhydrous) (it is colorless) + 5H₂O = CuSO₄.5H₂O (blue color)Formation of precipitate:2KI + PbCl₂ = PbI₂ (ppt) + 2KClNa₂SO₄ + BaCl₂ = 2NaCl + BaSO₄ (ppt)Evolution of energy:2Mg + O₂ = 2MgO (light energy)NaOH + HCl = NaCl + H₂O (heat energy)Absorption of energy: CaCO₃ (heat energy is absorbed) = CaO + O₂2AgCl (light energy is absorbed) = 2Ag + Cl₂2.3 Chemical formulae:1. Ca₃(PO₄)₂2. NaHCO₃3. MgCl₂4. CuSO₄5. NaClO₃6. Mg₃N₂7. Al(OH)₃8. KHSO₃9. ZnS10. FeCl₂2.4 Balancing and naming1. 2Mg + O₂ = 2MgO (Combustion reaction)2. H₂ + Cl₂ = 2HCl (Combination reaction)3. Cu + 2AgNO₃ = Cu(NO₃)₂ + 2Ag (displacement reaction)4. CaCO₃ = CaO + O₂ (decomposition reaction)5. Fe + CuSO₄ = FeSO₄ + Cu (displacement reaction)6. NaOH + HCl = NaCl + H₂O (neutralization reaction)7. 2KI + PbCl₂ = PbI₂ (ppt) + 2KCl (precipitation reaction)8. 2KBr + Cl₂ = 2KCl + Br₂ (Displacement reaction)9. 2KClO₃ = 2KCl + 3O₂ (Decomposition reaction)10. 2Fe + S₈ = 8FeS (Combination reaction)

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But when ANOTHER electron is ADDED to Oө to form O2- ion, energy is absorbed to overcome the strong ELECTROSTATIC REPULSION between the negatively charged Oө ion and the second electron being added. Thus,the second electron gain enthalpy of oxygen is positive.I HOPE it will help you..

follow me mark as brainestExplanation:SEPARATING Mixtures. The substances in a mixture are separated by the differences in their physical properties, such as their PARTICLE size. The more different the properties are, the EASIER it is to separate the substances. Tea leaves do not dissolve in water, so you can USE a strainer to FILTER them.

combination reaction combination reaction DISPLACEMENT reaction decomposotion reaction displacement reaction double displacement reaction (PRECIPITATION )double displacement reaction displacement reaction decomposition reaction combination reaction may it will be HELPFUL for you. Mark as BRAINLIST

The process of centrifugation has a wide spectrum of industrial and laboratory-scale applications. Centrifugation is a technique that can be used to separate the dissolved particles in a solution based on their density, size, viscosity, or shape. In this technique, a centrifugal force is applied on the solution in order to separate the HIGHLY dense components of the solution for the components that have relatively low DENSITIES. A few important applications of centrifugation are listed below.What are the Applications of Centrifugation?Centrifugation can be employed to separate a mixture of two different miscible liquids.This technique can also be used in order to study and analyze macromolecules and their hydrodynamic properties.Mammalian cells can be purified with the help of a special type of centrifuge.Centrifugation is KNOWN to have a vital role in the fractionation of many subcellular organelles. Furthermore, centrifugation is also useful in the fractionation of membrane fractions and membranes.Centrifugation also has applications in the fractionation of membrane vesicles.Chalk can be separated from water with the help of a centrifuge.Skimmed milk is a form of milk that has a LOWER amount of dissolved fats. Skimmed milk can be OBTAINED from regular milk with the help of the process of centrifugation. Here, the centrifuge serves to separate the fat from the milk, leaving the required skimmed milk behind.Cyclonic separation is an important process that has vital applications in the separation of particles from air flows.Another important application of this technique is in the stabilization and clarification of wine.This technique, in combination with other purification techniques, is extremely helpful while separating proteins. Other techniques that are used include salting out techniques such as ammonium sulfate precipitation.Centrifuges are widely used in the field of forensic chemistry. In this field, the technique is employed for the separation of blood components from blood samples. Furthermore, the technique is also employed in certain laboratories for the separation of urine components from urine samples.Differential centrifugation, a distinct type of centrifugation, is known to have applications in the identification of organelles