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ints of this theory are: 1. RADIANT energy is emitted or ABSORBED not CONTINUOUSLY but discontinuously in the form of small packets of energy called quanta. Each wave packet orquantum is ASSOCIATED with definite amount of energy.

covalent BONDS according to quantum THEORY of VALENCE bond theory (modern concept).

gnetic substances:-Substances which show the permanent magnetic moment even in the absence of magnetic field are called ferromagnetic substances. They remains permanently magnetized due to the reason, the metal ION of these substances are group together to form domains and when magnetic field is applied these domains are oriented in the same directions. Thus when magnetic field is removed these domains remains permanently oriented and forms very strong permanent magnets Example:Fe, Ni, CoAntiferro magnetic substances:-Substance which are expected to possess paramagnetism or ferromagnetism on the basis of magnetic MOMENTS of the domains but actually they possess NET o magnetic moment are called antiferro magnetic substances.Example:MnOFerrimagneticFe3O4 Iron(II,III) oxide CuFe2O4 CuprospinelExample:Fe, Ni, CO

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Question PAPER1. What is the maximum number of electrons that can be present in an atom in which the highest principal quantum number is 4? [1]2. How is bond order related to the stability of a molecule ? [1]3. What is the binding force between molecules if a substance is a gas under ordinary conditions of temperature and pressure ? [1]SAMPLE Question Paper1. What is the maximum number of electrons that can be present in an atom in which the highest principal quantum number is 4? [1]2. How is bond order related to the stability of a molecule ? [1]3. What is the binding force between molecules if a substance is a gas under ordinary conditions of temperature and pressure ? [1]. How many hydrogen bonded water molecule(s) are present in CuSO4.5H20 ? [1]6. A sample of NaNO3 weighing 0.83 G is placed in a 50 ml volumetric flask. The flask is then filled with water to the mark on the neck. What is the MOLARITY of the solution ? [2]Ϧ០ᖰ៩ ɨƬ'ន Ϧ៩ɭᖰ ƴ០⩏ Ϧ♬⩔៩ ♬ Ɯ០⩎ᖱ៩Ʀ⨏⩏ɭ ᖱ♬ƴ

r☢ They can't be used for electrical TRANSMISSION because they are BAD CONDUCTORS of electricity and also they cathches FIRE easily due to a small spark

erence between MASS and weight. 1. mass = 1 mass is SCALAR QUANTITY. 2. mass is constant 3. mass is amount of MATTER present in body weight= 1. weight is vector quantity 2. weight CHANGES place to place 3. weight is force

hysical properties, such as the MELTING temperature of iron or the FREEZING ... Other EXAMPLES of chemical changes INCLUDE reactions

ppens when Sodium hydroxide solution is added to Ferrous Sulphate solution? Write with observation and balanced chemical equationYou will get a colourless solution of NA2SO4 with a PALE green precipitate of IRON(II) hydroxide. It will be a double displacement reaction in the FOLLOWING way:FeSO4 (aq) -> Fe2+ + SO4 2-2NaOH (aq) -> 2Na+ + 2OH-Now the IONS will get exchanged the -ve radical from 2 moles of NaOH ie 2 OH-will combine with Fe2+. Similarly 2 moles of +ve radical Na+ will combine with SO4 2- .Fe2+ + 2 OH- -> Fe(OH)2 (S)2Na+ + SO4 2- -> Na2SO4 (aq)

al isomer of pentyl alvohol on oxidation will PRODUCE KETON only

orobenzene is more STRONGER than those of O and M ISOMER

ction will DEPEND UPON the amount of the oxygen.... If the amount of oxygen will less then it forms nitrogen MONOXIDE (NO) and if more then it forms (NO2) Hope it will HELP you...

... NEUTRON =ATOMIC mass-atomic NUMBER. HOPE it will HELP you....

is the smallest in size among the alkali metals. Hence, Li+ ion can polarize WATER molecules more easily than other alkali metals. As a result, water molecules get attached to lithium SALTS as water of crystallization. Hence, lithium salts such as trihydrated lithium CHLORIDE (LiCl.3H20) are commonly hydrated. As the size of the ions increases, their polarizing power decreases. Hence, other alkali metal ions usually form ANHYDROUS salts.

y, when calcium reacts with water, the REACTION is less VIGOROUS and it forms calcium hydroxide with RELEASE of hydrogen gas, but the heat evolved is not sufficient for hydrogen gas to catch fire and so it sticks over the surface of calcium hydroxide and the WALL of container which do not let the calcium hydroxide to SINK and it continues to float on the water surface .#HopeItHelps.. :)

the QUESTION here

column reactors provide advantages both in design and operation as compared to other reactors. They have excellent heat and mass TRANSFER characteristics, meaning high heat and mass transfer coefficients. LITTLE maintenance and LOW operating costs are REQUIRED. Lack of moving parts and COMPACTNESS

lute sulphuric acid is ADDED to SODIUM carbonate, the corresponding salt, sodium sulphate and water are formed and carbon dioxide gas is evolved.H2SO4 + Na2CO3 -----> Na2SO4 + H2O + CO2

mber 23, 1542, Akbar, the future Mughal Emperor, was born at Amarkot. His father, Humayun, had already lost the kingdom won by Babar, and Akbar's CHILDHOOD was spent in exile. Humayun reconquered India in 1555, only to die, and the boy-king had to endure five years of regency before he came into his own. He stands out among Asiatic rulers as a determined leader and enlightened organizer. But the man was greater than the king. His interest in religion and philosophy, art and science is famous, but the distinguishing marks of his greatness were the questing intelligence and fearless judgment he consistently brought to bear upon the difficulties with which he was surrounded. He set himself to unite Hindu and Muslim India. He married into the ancient Rajput royal families, and Jahangir, his successor, was born of a Rajput princess. It is worth remembering that his reign coincides almost exactly with that of Elizabeth of England. At a time when Europe still found the methods of the rack and stake acceptable, he instituted and enforced religious toleration. He grappled with the horrors of suttee TWO hundred years before Bentinck abolished it. He was the patron of learning and the arts. His justice knew no distinction of caste or creed or colour. Such was the man, who, while he lived, united India in MUTUAL SERVICE. The fourth centenary of Akbar's birth will be celebrated by a meeting arranged by the British Council, the Royal Asiatic Society, the East India Association and the India Society to be held in the rooms of the Royal Society on November 23.

acetate, also known as MeOAc, acetic ACID methyl ester or methyl ethanoate, is a carboxylate ester with the FORMULA CH3COOCH3. It is a flammable LIQUID with a characteristically pleasant smell reminiscent of some GLUES and nail polish removers. Methyl acetate is occasionally used as a solvent, being weakly polar and lipophilic, but its close relative ethyl acetate is a more common solvent being less toxic and less soluble in water. Methyl acetate has a solubility of 25% in water at room temperature. At elevated temperature its solubility in water is much higher. Methyl acetate is not stable in the PRESENCE of strong aqueous bases or aqueous acids. Methyl acetate is not considered as a VOC.[4]

ass=8g,ATOMIC mass=32gmolecular mass=256gno of moles=therefore no of MOLECULES=therefore ANS is 0.1881875 molecules

ास्त्र में अपचन का मतलब एक ऐसी अभिक्रिया होता है , जिसमे हाइड्रोजन या किसी अन्य विद्युत् धनात्मक तत्त्व का संयोग हो या फिर ऑक्सीजन अथवा विद्युत् ऋणात्मक तत्त्व का वियोग हो ।अपचयन की प्रक्रिया में ऋणात्मक संयोजकता में वृद्धि होती है तथा धनात्मक संयोजकता की संख्या में कमी आती है ।उपचयन एक ऐसी रासायनिक अभिक्रिया है जिसमे इलेक्ट्रॉन्स मुक्त होते है ।इस अभिक्रिया में किसी तत्त्व या यौगिक में विद्युत् ऋणात्मक परमाणुओं का अनुपात बढ़ जाता है तथा विद्युत् धनात्मक परमाणुओं का अनुपात कम हो जाता है।I HOPE you LIKED it

it is bcz sodium has 1 electron in its outer most  SHELL, while SO4 has 2 ELECTRONS in its outer most shell

The equilibrium constant for the reaction INVOLVING decomposition of one mole of AMMONIA is:Explanation:The equilibrium constant will be given as :Now the equilibrium constant for the reaction of decomposition of 1 mole of ammonia:The equilibrium constant for the reaction involving decomposition of one mole of ammonia is:

it is a METAL OXIDE

ing to "first law of thermodynamics" change in internal energy (u) = heat LIBERATED (q) + work done (w). The vessel is a closed ONE. HENCE, the "volume remains" the "same". Hence, work done (w) = 0 Hence, change internal energy (u) = heat liberated (q) Heat liberated, Here N is the amount of gas in mole, the "molar heat capacity" at "constant volume". T represents the temperature change (500 - 200 = 300 K) At 300 K, the of carbon dioxide is 0.657 kJ/kg.K Substituting these values in , we have  "

he temperature remains constant.We SOLVE this PROBLEM USING the Boyle’s LAW{ { P }_{ 1 }{ V }_{ 1 }={ P }_{ 2 }{ V }_{ 2 } }Volume of oxygen is 3.15 L at 1.00 atm.Let = 3.15 L and = 1Find the volume of oxygen at 2.50 atmLet =2.50The volume of a sample of oxygen is  1.26 L.

e here is ur answer!Q. Why are sodium and potassium stored under kerosene? Because if they kept open they can BURN and if they kept in water they can react with water. So, they are kept in kerosene. Sodium and Potassium are the most REACTIVE metals on this earth. They react very EXPLOSIVELY with both water and air that is why they are stored in kerosene instead. HOPE IT'S HELPFUL FOR YOU.Mark as a brainlist.

nerally a GAS behave more like an ideal has as HIGHER temperatures and lower pressure as the potential ENERGY due to INTERMOLECULAR forces becomes LESS significant composed with the particles kinetic energy and the size of the molecules becomes less significant composed to the empty space between them

its a very reactive metal and it has HIGHER AFFINITY to other elements.It can only be extracted through electrolysisMark it as BRAINLIEST.

ions are primarily found inside the human cells such as Nerve Cells. They regulate the flow of water across the membrane.They are needed for transport of sugars and amino acids into the cells.Sodium maintains the electrolyte balance in the body.Potassium ions are primarily found inside the cell.Potassium ions maintain the osmolarity (the concentration of a solution expressed as the TOTAL number of solute particles per litre) of the cell. They also regulate the opening and the closing of the stomata.Potassium ions acts as cofactor for CERTAIN enzymes such as pyruvate kinase.Potassium is important in HEART function and in SKELETON and muscle contraction.hope is this helpful...... to you

e of the E1 reaction depends only on the substrate, SINCE the rate LIMITING step is the formation of a CARBOCATION. Hence, the more stable that carbocation is, the faster thereaction will be. ... The first case is anE2 reaction. The LEAVING group must be anti to the hydrogen that is removed.

mers are polymers PRODUCED by LIVING organisms; in other words, they are polymeric biomolecules. Biopolymers CONTAIN monomeric unitsthat are covalently bonded to FORM larger STRUCTURES.

lpentane is the NAME of COMPOUND ..MAY it HELP you..

chemistry can either stand for Dibasic Ether or Double Bond Equivalent.DBE also known as level of unsaturation is the presence of level of unsaturation in an organic molecule. Presence of unsaturation MEANS presence of a double bond or a RING STRUCTURE. Presence of a triple bond in an organic molecule is counted as DBE level EQUALS to 2. OXYGEN is not counted.For example, Benzene has 3 double bonds and one ring structure which means DBE in Benzene is 4.

s of p-block are are MOSTLY non-METALS , elements of s-block are metals, so they combine to FORM metallic BOND.

e,Ammonia is Tetrahedral HOWEVER its molecular Geometry is Trigonal Pyramidal. The Bond angle of Ammonia molecules is 107 Degrees. The Ammonia molecule GENERALLY made by reaction between ONE Nitrogen and three Hydrogen atoms. NH3 has eight VALENCE electrons (five from N and three Hydrogens). Ammonia has one lone pair of Electron. The Nitrogen atom in the Ammonia generally shows sp3 hybridization.Hope it HELPED.