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Balanced equations(a) 2NaOH + H2SO4 ---> Na2SO4 + 2H2O(b) Hg(NO3)2 + 2KI ---> HgI2 + 2KNO3(c) 2H2 + O2 ---> 2H2O(d) 2KClO3 ---> 2KCl + 3O2(e) C3H8 + 5O2 ---> 3CO2 + 4H2O

P=1/fP=1/2 DP=0.5D

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balmer series always ends at n =2 so, first line will be 3→2 , 2nd will be 4→2 and 3rd will be 5→2

option B

7.bromine8.carbonated9.rhodium

A very easy solution is to take a sample ofcolourless liquidand put on stove if it starts boiling exactly at 100 ºC then it ispure water.

Any other colourless liquidsuch as vinegar always have different boiling point.

At room temperature, elemental iodine is a black-bluish solid. When heated, solid iodine sublimates and enters the gas phase. Iodine got its name from the Greek word 'ἰοειδής', meaning 'purple'. Indeed, iodine vapor has a beautifulpurplecolor

mercury is a liquid metal. bromine is a liquid non metal.diamond is the hardest material available due to its structure. it is then followed by copper. sodium is the weakest among the three.Diamond>Copper>Sodium

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HBr is an ionic compound in which H has + 1 and Br has -1 ion e.g charge one each have equal to charge of one electron or charge of proton .dipole moment =charge x distance between them =1.6 x 10^-19 x 141 x 10^-12 Cm=225.6 x 10^-31 Cm=22.56 x 10^-30 Cmnow,% of ionic characters =dipole moment by experimental/dipole moment by theoretical x100=(2.6 x 10^-30/22.56 x 10^-30 ) x 100=260/22.56 %=11.52 %

option b)

ans is B)

We know ,HBr is an ionic compound in which H has + 1 and Br has -1 ion e.g charge one each have equal to charge of one electron or charge of proton .dipole moment =charge x distance between them =1.6 x 10^-19 x 141 x 10^-12 Cm=225.6 x 10^-31 Cm=22.56 x 10^-30 Cmnow,% of ionic characters =dipole moment by experimental/dipole moment by theoretical x100=(2.6 x 10^-30/22.56 x 10^-30 ) x 100=260/22.56 %=11.52 %

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BETWEEN HF, HCl, HBr and HI. HF has the highest ionic character because:1. F has the highest electron affinity. 2. In HF, electronegativity difference is highest 3. F - ion has the highest Value of ionic radius. 4. Atomic Orbitals of H and F have almost similar energy.

(b) is correct option

Gasparticles spread out to fill a container evenly, unlike solids and liquids.Gasis astateof matter that has no fixed shape and no fixed volume.Gaseshave lower density than otherstatesof matter, such as solids and liquids. ... The particles exert more force on the interior volume of the container.

Gas is a state of matter that has no shape and no fixed volume.

Gasis astateof matter that has no fixed shape and no fixed volume.Gaseshave lower density than otherstatesof matter, such as solids and liquids. ... The particles exert more force on the interior volume of the container. This force is called pressure

the state which can evaporate from gas

320k-273=47300k-273=27

we can se that half life is directly proportional to the pressure ( amount of gas)

=> t½ ∞ [A]

so, order is 0

option a

288 x 10^-8

show the solution.

I can tell you as I know chemistry

Let the volume of the round bottomed flask beV.

Then, the volume of air inside the flask at 27° C isV.

Now,

V1=V

T1= 27°C = 300 K

V2=?

T2= 477° C = 750 K

According to Charles’s law,

V1/T1= V2/T2

=> V2=V1T2/T1

=V(750/300)

= 2.5V

Therefore, volume of air expelled out = 2.5V–V= 1.5V

Hence, fraction of air expelled out = (1.5V)/2.5V) = 3/5

Fraction remaining in the flask = 2/5

Molarity, M, is the number ofmoles of solutein everyliter of solution. Thus it can be used to convert between moles of solute and volume of solution. The advantage of this is that one can use reagents in the form of solutions and measure out a given number of moles by measuring out the equivalent volume of reagent.Molality, m, is the number ofmoles of solutedissolved in eachkg of solvent. The units of molality are moles/kg. The symbol m is read "molal". Thus 2.3 m is "2.3 molal".

Few important characteristics of particles of matters are:1) They are of small size.2) They are in continuous motion because they possess high kinetic energy.3) They occupy space4) They attract each other due to high intermolecular forces.

It has 4 bonds and two lone pairs

total 6 → so hybridisation is sp3d2 square planer

option B

this is the diagram you need to draw

Phenols can be converted to salicylic acid by kolbe's reaction

Mineralsare naturally occurring inorganic solidswith acrystalline structure and a definite range of chemical formula.Oresare concentrations ofmineralsin rock that are high enough to be economically extracted for use.

Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase

substance changes from a solid to a gas without ever passing through a liquid phase. Dry ice, solid CO2, provides a commonexampleofsublimation.

The conversion of any substance directly from solid to gaseous state (without passing through liquid state) is known as sublimation examples - camphor and naphthalene balls

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The density of water is approximately 1000 g/L and its molar mass = 8.02 g/mol (or 1/18.02=0.055mol/g).Therefore, the molar concentration of water is: (H2O) = 1000 g/L / (18.02 g/mol) =55.5mol/L.(molar concentration=density/molar mass)

Tetra-ammine dichloro cobaltTetraquamanganese(II) ion

98% by weight means 98 gm H2SO4 in 100 gm solution or 98 g H2SO4 in 2 g water.Number of moles of H2SO4 = 98/98 = 1Density = 1.8 g/LVolume of solution = Mass of solution/ Density = 100/1.8 = 55.55 ml = 0.055 L Applying,M1V1 = M2V218.18 x V1 = 0.1 x1V1 = 0.0055 L = 5.5 ml Hence , volume of acid required = 5.5 ml

Froth flotation method is used for the concentration ofsulphide ores. The method is based on the preferential wetting properties with the frothing agent and water. In the given options,Galena(PbS) is the onlysulphide ore.

(d) solids,liquids and gases correct answer

answer is d solids, liquid and gases

9.26 is the pH of a solution

moles of H2SO4 = 18*(50)/1000 = 0.9 moles

and volume = 50+50 = 100ml = 0.1 L

so, M = 0.9/0.1 = 9

option C

Hrdrogenation is a process to obtain saturated hydrocarbons from unsaturated hydrocarbons.

See a common example :-CH2=CH2 + H2 (Pd) ---> CH3CH3

The unsaturated hydrocarbon ethene is reduced to ethane.

The conditions require pressure (different for different reactions) and catalyst such as Ni, Pd, Pt

The Physical properties might change as follows :-(i) Unsaturated hydrocarbons are mainly insoluble in water but saturated are soluble. Therefore the insoluble becomes soluble .(ii) The boiling point and freezing point changes as accordance to the compounds.