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Hydrogen molecules are PASSED into the electric discharge and emit ELECTROMAGNETIC radiations of discrete frequency.This radiation when passed through prism, an emerged BEAM of light is collected over photo graphic film called H-atomic spectrum and it contains various series. They are as follows.a) Lyman seriesb) Balmer seriesc) Paschen seriesd) BRACKET seriese) Pfund series.The spectrum LIES in the infra-red region.

,D×v=m 1×0.05=mm=0.05so no of molecules=0.05/18×6.022×10^23

ution turns PALE green as iron replasce copper to form iron sulphate solution. You can also OBSERVE deposition of copper at the bottom of the TEST tube or CONTAINER

of PARIS on heatingCaSO4.2H2O --------------------> CaSO4.1/2H2O+1 1/2H2O

e test with bromine WATER can be used to tell the DIFFERENCE between an alkane and an alkene. An alkene will turn brown bromine water COLOURLESS as the bromine reacts with the carbon-carbon double bond. In fact this reaction will occur for unsaturated COMPOUNDS containing carbon-carbon double bonds.MARK HAS BRANLIST

your ANSWER HOPE this HELPS you

ton equation, is a way of using formulas to indicate the chemicals that are a part of the CHEMICAL reaction. In essence, it is identical to a word equation, except that the names of the reactants and the PRODUCTS are substituted by their chemical symbols. In skeleton equations, the physical states of the reactants and products are mentioned as subscripts on the right-hand side next to each element. The symbol (s) is used to represent a solid, (l) a liquid, (aq) an aqueous, and (g) a gas, this increases the utility of the skeleton equation. The FOLLOWING is an equation for the reaction that produces SALT: Na(s) + Cl2(g) -------> NaCl(s) The skeleton equation thus provides us with a better means of expressing a chemical reaction, as compared to a word equation. Even though there are two chlorine ATOMS on the reaction side, there is just a single one on the product side, one chlorine atom isn't accounted for by the skeleton equation. Thus, the skeleton equation shows only the elements which are involved in a chemical reaction, but does not express the quantities in which they react or are produced. Since the quantity of reactants on the left-hand side (LHS) mostly differs from the quantity of the product/s on the right-hand side (RHS), a skeleton equations is said to be an unbalanced equation.PLZ MARK IT BRAINLIST

ello mate║║║║║║║║АпЗЩЁГ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓Stoichiometry is the method by which we calculate how many grams of these reactants ... The conversion factor "2 moles O2/1 mole CH4" is used to RELATE the moles of O2 used ... If you want to react two moles of HCl, you MUST have two moles of NaOH. ... If you want to DILUTE a prepared solution, you must add more solvent.АпЗЩЁГ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑plz mark me brainliest if u liked it # be brainly ФΔπω⊅⊄⊇email me if you have anymore question for me to ASK:  [email protected]

V2  14.8 * V1 = 0.25*100  V1 = 0.25*100/14.8  V1 = 1.689ml   M1V1= M2V2  14.8*10 = M2*250  M2 = 14.8*10/250  M2 = 0.592M

lowing structures are CONSIDERED relatively stable: Structures having filled octet a for second ROW elements (C, N, O, F) are stable. Structures having minimum number of formal charges and maximum number of BONDS. STRUCTURE in which negative charge appears on the most electronegative atom (C < N < O)

K, ΔG will be negative. REACTION proceeds in the forward direction. If Q = K, ΔG = 0, no net reaction. [Hint: NEXT relate Q with concentration of CO, H2, CH4 and H2O in view of reduced volume (increased PRESSURE). Show that Q < K and hence the reaction proceeds in forward direction.]

ndian government survey has revealed that the Taj Mahal, the nation's best-known monument, is again facing a major threat from pollution. The report, compiled by India's National Environment Engineering Research Institute, shows that measures taken after previous scares that the 17th-century tomb was being irreparably damaged by air and water pollution are failing. The survey, commissioned by the Ministry of Environment, found that pollution levels in the city of Agra, where the Taj Mahal is located, had risen significantly over recent years as a result of growth in industry, traffic and population. The £90m government programme, launched between 1998 and 2000 after the monument's famous white MARBLE was seen to be turning yellow, has had some impact, the report says, but not enough to keep up with pollution around the site. When launched, the programme received global attention, with President Bill Clinton saying that pollution had done "what 350 years of wars, invasions and natural disasters have failed to do [and] begun to mar the magnificent walls of the Taj Mahal". Vehicles are now banned from within 500 metres of the monument and an LED display gives a running count of air pollution. Sign up to the Green Light email to get the planet's most important stories Read more But the new report found that emissions of nitrogen oxide and particulates, for example, had reached levels higher than those that prompted a supreme court intervention to force authorities to act a decade ago. Environmental campaigners in Agra, a bustling manufacturing centre in the populous and poor northern Indian STATE of Uttar Pradesh, said that the Taj Mahal was also threatened by dropping water tables and pollution from the river Yamuna, which runs alongside the structure. "The levels are much lower than they were when it was built and there is a serious risk that the whole construction will be destabilised as its foundations are made of wood and need to be kept moist to avoid subsiding," said Ashwina Kumar Mishra, a local activist. "It is the most beautiful place in India and it will be a tragedy if something bad happens to it." Government archeologists WORKING at the Taj Mahal dismissed the claims of activists as "rumours". "These stories keep COMING up without facts," said ID Diwedi, a senior archeologist at the site.

e procedure for writing COVALENT LEWIS Structures was GIVEN in a PREVIOUS article entitled “Lewis Structures and the Octet Rule”. Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures). Let us consider the case of SCN-. Thiocyanate is the conjugate base of thiocyanic acid (HSCN). It is also known as rhodanide (from the Greek word for rose) because of the red color of its complexes with iron. Common SALTS include the colorless salts sodium thiocyanate and pottasium thiocyanate. It is produced by the reaction of elemental sulfur with cyanide: 8 CN− + S8 → 8 SCN−

ssible CARBOCATIONS are Order of INCREASING stability I < IV < II < III

er is CORRECT but this is my PROCEDURE. Stronger the BOND SMALLER the length

ams of H2  2- 5 LITERS of CH4  3- 5 moles of O2  4- 5x10^23 molecules of CO2 (g)

1 s 2 2 s 22 p 6 3 s 2 3 p 6 4 s 2 3 d 6 in the ground state  More correctly the electrons lost are the  4 s 2 leaving  1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 8 Explanation: NICKEL  N i 28 has 28 electrons. 18 electrons fill up the THIRD electron shell leaving 10 valance electrons. 2 electrons in the 4s and 8 elections in the 3d. When Nickel becomes  N i + 2 Nickel has lost 2 electrons leaving the atom with only 8 valance electrons. The 4s electrons a lower energy level that the 3d electrons because of the simpler electron path of the S orbital. So in the ground state the electrons being lost should be the 3d electrons. However the 4s electrons are further from the nucleus so losing the the 2 4s electrons leaves only the third shell electrons making the atoms more stable than losing the 3d electrons. So the SOMEWHAT stable electron configuration of  N i + 2 is  1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 8

xypropane, CH3OCH2CH2CH3 or 2 methoxypropane,CH3OCH(CH3)2

isplacement reaction.baso4 is the OXIDENT

the OXIDANT ZN is the REDUCTANT

the question-jj+jj+jjjjjj

y is a "MEASURE" of the lack of thermal energy of any mechanical work system. It also represents the system's randomness. As randomness increases the system entropy. Entropy of the system is directly proportional to the randomness. Let's predict the sign of entropy change in the following. Here, liquid CHANGES to gas more disordered. Entropy changes into positive Here, solid changes to gas more disordered. Entropy changes into positive Here, gas changes to solid LESS disordered. Entropy changes into negative. GRAPHITE is more stable allotrope. Entropy changes into positive."

given SALT BaCl2Barium is CATION 2+ whereas chloride is ANION -1

rgy contained in a fuel or food, DETERMINED by MEASURING the heat PRODUCED by the complete combustion of a specified quantity of it. This is now usually expressed in JOULES per KILOGRAM.

mposition reactions a single substance DECOMPOSES to form two or more substances.In combination reaction in two or more reactants combine to form a single product. CaO + CO2 → CACO3 + Energy From above examples, it is clear that the two reactions are exactly OPPOSITE to each other because of that, decomposition reactions are called opposite of combination reactions

and other gases in spaces in the soil;specifically,that which is found with in the ZONE of AERATION is called soil airHope it HELPS you☺️....

um is the chemical element with the ATOMIC number 4 which is the rare element in the universe. This element is mostly USED to IMPROVE the physical properties of aluminium, copper, nickel and iron.  The element Beryllium has less designative value of the REDUCTION potential because the negative value arises lesser in Be due to energy which is hybridized larger and accomplice with the brevity of the size of and almost have large value of the atomization of the metal which is under enthalpy.

modynamics, with RESPECT to pressure change the relative volume of SOLID or liquid change is called compressibility .i) In solid the molecules are very tightly packed. There are no space between the molecules hence it is difficult to compress ii) In liquid the molecules are somewhat loosely packed compared to solid hence these molecules are also difficult to compress. iii) But in case of gas the molecules are very loosely packed. It is very easy to compress the gas molecules. But in theoretical and practical purposes GASES are consider as incompressible in nature because they are moving at very at a very SLOW speed, which is 220miles/ HOUR

I have no IDEA for this ANSWER

um BURNS in air to FORM Magnesium oxide. So, the ash is magnesium oxide.When this ash MEANS MgO is treated with water it form:MgO + H2O to form MG(OH)2

ghtly high energy than  because i) The effective nuclear charge is greater in Gallium compared to AL (the ATOMIC number of Ga is higher than atomic number of Al) II) The OUTERMOST electrons or valence electrons are tightly held. Hence Gallium has high ionization energy compared to Al. III) Because of high Ionization energy Gallium is more electronegative compared to Aluminum

he ATMOSPHERE there are so many pollutants are there. In such pollutants the term denotes the major pollutants such as NO (nitric oxide) and (nitrogen dioxide) in the atmosphere. ii) The NO and are RESPONSIBLE for smog FORMATION, acid RAINS and which affects the troposphere region in the atmosphere III) These gases are produced from the reaction of nitrogen and oxygen during combustion of hydrocarbons in air at very high temperatures.  iv) produced naturally during lightning v) The motor vehicles used in the large cities are the major source of air pollutants

: Compounds having “same” “molecular formula” but exhibit different structures.CHAIN ISOMERS: It is a KIND of “structural ISOMERISM” in which the isomers have the “same” molecular formulation but “differ” in the order in which the carbon atoms are linked.Position isomers: This isomers are “constitutional isomers” with the same “carbon skeleton” and “functional groups” but differ from each other when the functional groups are located on or in the carbon chain.

nd in carbon dioxide is a polar bond hence there are two C=O bonds. Carbon dioxide MOLECULE has the zero- dipole moment. This can be POSSIBLE only if the molecule carbon dioxide BELONGS to the LINEAR molecule. The linear molecule of the carbon dioxide is given by O=C=O bond.     The dipole moment of the two bonds C=O eliminate the moment of each other where water molecule has the moment of dipole (1.84D). Because of O-H the has a bent like structure which are adapted at an angle  104.5° and the moment of the bond do not get cancelled each other.

that = LOG of acid constant and                               = log of base constant They both are related only when the acids and bases are conjugate to each other .For EXAMPLE – i) CHCOOH and CHCOO                           ii) HPO and HPOGenerally,   +  = Here  is the water constant. Only for    and  that describe the same reaction  is it TRUE that + = 14

nce structures” are “two forms” of a molecule with the same CHEMICAL CONNECTIVITY but electrons differently distributed around the STRUCTURE. Resonance happens when “electrons” flow through adjacent PI systems.It is a method to describe the “delocalized electrons” in certain MOLECULES where the connection cannot be expressed explicitly by a single Lewis structure. Each Lewis structure is referred to as a contributing molecule or ion structure.

ng the periodic table Nitrogen is the element belong to the group 15 which was also CALLED pnictogens. Fluroine is the element belong to the group 7 which was also called halogens. The reason that the length of the bond of N-F in the element NF3 seems to be greater than the total sum of the single COVALENT RADII of N and F because Nitrogen and Fluroine are SMALL and have highest electro density hence they do not attract each other and the pair of electrons which was bonded leading to the larger size of the bond than expected.

cid or base can be formed by the losing or gaining of electron. The given compound carbon hydride molecular formula . This carbon hydride is being electron PRECISE which means they are having exact number of electrons to MAKE a covalent bonds. But, they do not lose or GAIN of electrons. Therefore, they do not act as Lewis ACID or Lewis base.

that sulfur dioxide causes pollution and damages natural resources. YET, the sulfur dioxide pollution can be CONTROLLED by the following steps1.        STEAM Turbine-Gas Turbine Combined Cycles2.        Magnetohydrodynamics3.        The Use of Binary Cycles or Working Fluids other than Steam4.        Shift to Nuclear Generation as rapidly as possible5.        Shift to Lower sulfur fuels6.        Natural gas.7.        Petroleum and its products8.        Coal9.        LOW Sulfur Oil from Coal10.        Fluidized Bed Combustion11.        Shift fuel consumption from electricity to pipeline grade gas made from coal

nd2s ORBITALS both OCCUPIED 2electrons this is similarity and DIFFERENCE is both are belong to DIFF ENERGY level

mple for electrophilic substitution REACTION is addition to Hydrogen Bromide. The ELECTROPHILE H+ was provided by Hydrogen Bromide. 1° and 2° carbocations are formed when the electrophile violates the double bond. The formation of carbocations is shown in first diagram.     Primary carbocations are less stable than the secondary carbocations. It will form in a very FAST manner so that the FORMER holds sway. Thus, in the next step the major product 2-bromopropane was formed when Br- violates the carbocation as shown in second diagram.    Carbon atom which has the lesser number of hydrogen ATOMS is connected with the adverse part of the addendum is formed. This reaction was followed by the rules 'Markovnikov's'.    With the presence of benzyl peroxide the reaction is added to convert anti to rule of Markovnikov's. The reaction is followed by the mechanism known as free radical chainasshown in third and fourth diagram.     Primary radicals are less stable than secondary free radicals. Hence it will form in a very faster manner so that the former holds sway. The major product is obtained as the result known as 1-bromopropane as shown in fifth diagram.     Br free radical acts as an electrophile because of the presence of peroxide. As a result, two different products are obtained on addition to Hydrogen Bromide to propene in the absence and presence of peroxide.

the FUEL GASES are used for cutting and WELDING purposes The fuel gases used in the industries are acetylene, methane, propane and propylene Combustion of the conventional fuels such as  in them hard coal, brown coal, oil and natural gases cause POLLUTION in the atmosphere with the oxides of sulfur and nitrogen presentThe emitted sulfur dioxide and nitrogen dioxide are pressured in water to form sulfuric and nitric acid RESPECTIVELY which are used for other useful purposes .