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ecause at 68% concentration it forms a constant BOILING mixture, i.e., if heated beyond this concentration then proportion of water vapour and nitric acid vapour, LEAVING the dilute acid does not change. Thus, it cannot be CONCENTRATED by boiling. nitric acid.

crystal the number of octahedral voids = 450% of them are occupied by the metal ion so no of voids occupied =2, HENCE the number of metal ions =2In FCC lattice the TOTAL number of O2- atoms are =4 ( 8 at CORNERS and 6 at face centers)Therefore the formula of the compound becomes M2O4 = MO2.Now since the cahrge on a compond is zero so 1 x n +( 2 x -2) = 0=> n=4 Answerhope it HELPS....

ehyde. ----CHOfor KETONE. -----CO IN aldehyde OXYGEN has only one bond while in ketone oxygen has DOUBLE bonds.Aldehyde shows aldolcondensision while ketone does not shows.

ould not be added to water because(i) When a concentrated acid is added to water for PREPARING a dilute acid ,then the heat is evolved GRADUALLY and easily absorbed by the large amount of water ( to which it is being added ) (ii) If however, water is added to concentrated acid to dilute it ,then a large amount of heat is evolved at once .This heat changes some of the water to steam explosively which can SPLASH the acid on our face or CLOTHES and cause acid BURNS. Even the glass container may break due to excessive heating .HOPE THIS HELPS YOU !!!!!!!!!!

re's the answer Cu does not react with dil. HCl because only METALS above hydrogen react with dilute ACIDS to GIVE hydrogenZn reacts with steam to give hydrogen Zn + H2O -> ZnO + H2Hope it HELPED!

l properties of metal:-#Reaction with oxygenMetals reacts with oxygen to FORM metal oxide.#Reaction with WATERWHEN metal react with water it FORMS metal hydroxide or oxide.#Reaction with DILUTE acidMetals reacts with diluted acid to form metals salt and hydrogen gas.#Reaction of metal with salt of other metalWhen metal reacts with salt sol. of other less reactive metal it displaces it from salt sol. and separate it out.#Reaction with hydrogenGenerally metals do not combines with hydrogen but FER more reactive metal like sodium , potassium , calcium and magnesium combines with hydrogen and forms metal hydride.Chemical properties of non metals:-#Reaction with oxygenNon metals reacts with oxygen to form non metallic oxide.#Reaction of non metal with waterThere is no reaction b/w non metals and water.#Reaction with dilute acideThere is non reaction b/w non metals and dilute acide.#Reaction of non metal with other non metallic saltDuring this reaction a more reactive non metal displaces less reactive non metal from its salt sol.#Reaction of non metal with chlorine Non metals reacts with chlorine to form non metallic chloride.#Reaction with hydrogen Non metal reacts with hydrogen to form non metallic hydrogen.

ur ANSWERYOU do not NEED to heat liquid water or SOLID water (ice) to convert it into water vapour. The conversion continues to take place at all temperatures, INCLUDING sub-zero.All you need to do is let the space where vapour will COLLECT remain under vacuum and remove any air with water vapour (to prevent the space getting saturated with water vapour).You need to apply heat to convert water into steam, though. You also need to apply heat to hasten the speed of vaporisation of water.Hope it helps

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unt of TIN in the NEW ALLOY is 44 kg

and alkaline earth metals cannot be obtained by CHEMICAL reduction METHODS because they are very STRONG reducing agent and highly reactive metals. Because of this they can not be REDUCED by any other SUBSTANCE very easily.

dioxide gas is evolved when REACTION of dilute hydrochloric acid on SODIUM sulphite takes place.Sulfur dioxide is having a ROTTEN egg TYPE smell.Along with the sulfur dioxide, sodium chloride (a salt) is also formed.Reaction is as follows-Na₂SO₃ + 2 HCl → 2 NACL + H₂O + SO₂

bsorbs the CARBON dioxide released by the GERMINATING SEEDS and a partial vacuum is createdbecause of the loss of carbon dioxide in the FLASK

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ted zinc is preferred to the other metals in the PREPARATION of hydrogen using dilute acids because as GRANULATED zinc contains COPPER as impurity which acts as a catalyst in this reaction. thereby INCREASING the rate of reaction.

urities have a MARKED effect on the CST of a partially  miscible liquid pair. Sodium chloride is soluble only in water and not in phenol. Therefore, it will RAISE the CST of phenol-water SYSTEM.

lsion of ELECTRONS increase. they need less ENERGY to LEAVE

perty metals-1) shiny or lustreous. 2)sonorous3) ductile4) malleable5) no tensile strength (can be broken easily) 6) HIGH melting and boiling pointPhy. Property of non-metals-1) not lusturous except iodine2) not sonorous3) brittle4) lowmelting and boiling point5) non ductile6) non malleableCHEMICAL_METALS-1) good conducter of heat and electricity2) usually solid at room temperature3) metals high in the reactivity series react with air. 4) metals are electropositive. NON-METALS1) POOR CONDUCTER2) usually GAS3) do not react with AIR4) electronegativethanks for. PointsHope. U like itBTW UR handwriting is awesome,!!

due to the stability of CONJUGATE BASE ofalkyne by SP hybridized carbon atom. 2)In electrophilic substitution,alkynes are less reactivethan alkenes. It is because of relative stability of CARBOCATION formed in the CASE of alkenes. 3)In case of hydrogenation reactions,alkynes are more reactivethan alkenesHOPE ITS HELP YOU

y Hydrogen doesn’t have a fixed position in the periodic table. In some tables it is PLACED with alkali metals(above Sodium) and in some others it is lonely placed at the TOP (Randomly, Just above 1st Period). Hydrogen resembles alkali metals in electronic configuration. Hydrogen atom has the e- configuration 1S1 and is the first element to be placed as per the rule. It is placed with alkali metals because it can loose its ONE e- to form H+ just like the alkali metals. but hydrogen also resembles halogens. Alkali metals form hydrides like NaH and LiH just similar to NaCl and LICL. Electrolysis of hydrides gives H2 and Electrolysis of NaCl yields Cl2. Hydrogen can gain one electron like halogens to form noble gas configuration (H-). Due to its resemblence with alkali metals and halogens, its position is not yet fixed. But coventionally we keep it along with the alkali metals.

istry, catenation is the BONDING of ATOMS of the same element into a series, called a CHAIN. ... Catenation occurs most readily with carbon, which forms covalent BONDS with other carbon atoms to form longer chains and structures. This is the reason for the presence of the vast number of organic COMPOUNDS in nature.Please make me as brainliest

ination reaction: The reaction in which the two or more REACTANTS comes TOGETHER and gives a single product is CALLED combination reaction. ex. C+O2=C022. DECOMPOSITION reaction: The reaction in which there is single reactant and from which two or more products are FORMED is called decomposition reaction.ex. 2H20=2H2+02.

is the smallest atom amongalkali metals. ... When Lithium reacts with NITROGEN gas at room TEMPERATURE (N2), it forms Lithium Nitride (Li3N) which is stable, because the lattice energy released from the formation of Li3N is high ENOUGH to make the OVERALL reaction exothermic

is the smallest atom amongalkali metals. ... When Lithium reacts with NITROGEN gas at room temperature (N2), it FORMS Lithium Nitride (Li3N) which is stable, because the LATTICE energy RELEASED from the formation of Li3N is high enough to make the overall reaction exothermic

your answeradvantage of artificial insemination1) there is no NEED of MAINTENANCE of breeding bull for a herd hence the cost of maintenance of breeding bull is saved 2) it prevents the spread of certain disease and sterility due to genital disease 3) it increase the rate of conception 4) OLD, heavy and INJURED sires can be used5) it helps in MAINTAINING the accurate breeding and cawing records

As the electropositive character of the metal INCREASES or the basicity of their hydroxide increases on moving down the group their .. Thermal stability increases. Thus BaCo3 is the most STABLE..Hence, option ( D ) is CORRECT.....i hope this helps u mark it as BRAINLIEST i request u PLZ plz..

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e all elements,MG+ is striving for on octet ( 8 VALENCE electrons ) this is the most stable electrons configuration for most atoms. by the Mg+ LOSING only one electron ( +1 ) it has not REACHED that eight desired valence electrons configuration.thanks .......i hope this helps u...mark it as brainliest i request u plz plz...

re is UR answer.....In CASE of N ( CH3 )3 , GEOMETRY is pyramidal and in case of N ( SiH3 )3 , geometry is planar In Trimethyl Amines,N ATOM is Sp3 hybridized which results in pyramidal geometry. There is no Pi bonding bcz C has no low- lying- orbital..In Trisilyl Amines N atom is Sp2 hybridized which results in planar geometry. There is P!! - D!! bonding bcz Si has vacant D - orbital.. Filled 2P orbital of N overlaps with vacant 3d orbital of Si to from p!! - D!! BOND.. thanks...mark it as brainliest i request u plz

re seven resonance structures for SO3.ExplanationWhen you draw the Lewis structure, you first get the three structures at the top.In each of them, S has a formal charge of +2 and two of the O atoms have formal charges of -1.In each of the three structures in the middle, Shas a formal charge of +1 and one of the Oatoms has a formal charge of -1.In the bottom structure, all atoms have a formal charge of zero.From the POINT of view of formal charges, the bottom structure is the most STABLE structure.For NO2, we have 5 valence ELECTRONS with the Nitrogen; plus 6 for the Oxygen, we have 2 Oxygens. So 5 plus 12 equals 17 valence electrons. Nitrogen is the least electronegative, so we'll put that in the center, and let's put an Oxygen on either side.NO3– There are 3 possibleresonance structures that satisfy the octet RULE. In each resonance structure, the formal charge on N = +1; the formal charge on the N = O oxygen = 0; and the formal charge on each of the N – O oxygens = –1. The actualstructure is an equal MIXTURE of the 3resonance structures.

the polarity of covalent bond can be convenienty measured in TERMS of PHYSICAL QUANTITY called dipole MOMENTS..... above the molecules have dipole momentsZERO ,because dipole of the bond cancel each other. THANKS......MARK IT AS A BRAINLIEST I REQUEST U PLEASE......

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H + B2H6 --------> 2Na[ BH4 ] 2Na[ BH4 ] ====== SODIUMBOROHYDRIDE..thanks...i HOPE this helps u....MARK it as brainliest i request u PLZ.......

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. HERE IS UR ANSWER......PERCENTAGE OF BORON = MASS OF BORON ÷ MASS OF COMPOUND × 100 = 0.096/0.24×100 = 40%SO, PERCENTAGE OF OXYGEN = MASS OF OXYGEN / MASS OF COMPOUND ×100 0.144/0.24×100= 60%