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moles of H2 → 8/2 = 4 moles has the maximum no. of molecules.

it will depend on number of molesno of moles=AMT given/molecular weighthence for option a it is 8/2=4option b it is 64/64=1option c it is 44/44=1and option d 48/48=1hence option a had the highest no of moles hence highest number of molecules.

When the coal burns, it gives offsulfur dioxide,nitrogen oxideand carbon dioxide, among other gases. Thesulfurparticulates are partly removed with scrubbers or filters

A cation has a positive charge as it has lost an electron. An anion has a negative charge as it has gained an electron.

Their diffences are their charge, one is positive and the other is negative. Cations are metals, and anions are non-metals. They will move in different directions in an electric field.

Their similarities is that they both have a charge. Both will move in an electrical field.

Plz give me short answer

m = -2,-1,0,1,2 .... total m values = 5

and L = 2

option c

how come m has these many values

because this is the definition...

for L = 2. m can be -L to L here it is -2 to 2

as they are reflected by both magnetic and electric fieldshence they are particles

Both magnetic and electric field

Molarity of solution = 1 MMolar mass of KCl(Mb)= 39 + 35.5 = 74.5 g mol-1van’t Hoff factor,i= 2 ... (AsKCldissociates completely, number of ions produced are 2.)Let volume of solution = 1 L = 1000 mLMass of KCl solution = Volume of solution × Density of solution = 1000 × 1.04 = 1040 gMolarity = No of moles of solute (nb)/ Volume of solution (V⇒nb= 1× 1 = 1Mass of KCl (Wb)/ Molar mass of KCl (Mb) = 1⇒Mass ofKCl(Wb) = 1× 74.5 = 74.5 g∴Mass of solvent (Wa) = 1040 – 74.5 = 965.5 g = 0.9655 kg

Molality of the solution (m) = No of moles of solute/ Mass of solvent (kg) = 1/ 0.9655 = 1.03547 m

Delta Tb = i * Kb * m

= 2 * 0.52 * 1.0357 = 1.078 °c

Therefore boiling point of solution = 100 + 1.078

= 101.078°c

all are chain isomers

It's a "Reimer - Tiemann reaction.

THE CORRECT ANSWER IS OPTION 2

1,2,3,4 are primary because it is attached with Carbon which is in contact with single carbon atom.5 is secondary because it is attached with Carbon which is in contact with two carbon atoms.6 is tertiary because it is attached with Carbon which is in contact with three carbon atoms.

Ans :- (ii) zero

hii

Answer: 2. zero

Answer ii) zero is the answer

the correct options are 1,2,3

Ca(OH)2+H2SO4→CaSO4+2H2OAsperthestochiometricequation,1moleofCa(OH)2reactswith1moleofH2SO4So0.2moleofCa(OH)2gives?moleofH2SO4=11×0.2=0.2moleofH2SO4ButtheamountofH2SO4givenis0.5mole.ThatmeansCa(OH)2actsasalimitingreagent.So1moleofCa(OH)2gives1moleofCaSO40.2moleofCa(OH)2gives=11×0.2=0.2moleofCaSO4

The High Speed Diesel (HSD)marketed by our Corporation meets the Indian Standard IS 1460 : 2005 (5th Rev) governing the properties of diesel fuels.

Cinnabar is a toxic mercury sulfide mineral with a chemical composition of HgS. It is the only important ore of mercury.

mercury is the metal which is extrcted from cinnabar ore so mercury is right answer

B) is correct answer

If the temperature of a place is increased then the evaporation increases.Hence option b is correct.

the answer to the question is b

the correct answer is b

B) is correct answer

Whensoap is added to water,micelle formation takes place, this is because the hydrocarbon chains ofsoapmolecules are hydrophobic while the ionic ends are hydrophilic and hence soluble inwater. ... It willformin such type of solvent wheresoapis insoluble in that particular solvent.

A soap is a sodium or potassium salt of long chain fatty acids. It has one polar end and one non-polar end. The polar end is hydrophilic in nature i.e., this end is attracted towards water. The non-polar end is hydrophobic but lipophilic, i.e., it is attracted towards hydrocarbons. When soap is added to water, soap molecules arrange themselves in a cluster to keep the non-polar portion out of water such that the non-polar ends are in the interior of the cluster and the polar ends are on the surface of the cluster. Since the dirt present on clothes is organic in nature and insoluble in water, the hydrophobic ends of the clusters attach themselves to the dirt. This cluster formation in which the dirt is entrapped is the micelle.

When soap is added to water, micelle formation takes place, this is because the hydrocarbon chains of soap molecules are hydrophobic while the ionic ends are hydrophilic and hence soluble in water.Micelle will not form in all types of solvents. It will form in such type of solvent where soap is insoluble in that particular solvent.

thank you

There are about twenty different types of chemicals used for making different synthetic rubber varities. It is obvious that there are different synthetic rubber kinds. Some of the popular synthetic rubber types include the following.-Acrylic Rubber (ACM)-Butadiene Rubber (BR)-Butyl Rubber (IIR)-Chlorosulfonated Polyethylene (CSM)/ Hypalon-Ethylene Propylene Diene -Monomer (EPDM)-Fluoroelastomers (FKM)/ Viton-Isoprene Rubber (IR)-Nitrile Rubber (NBR)-Perfluoroelastomer (FFKM)-Polychloroprene (CR)/ Neoprene-Polysulfide Rubber (PSR)-Silicone Rubber (SiR)-Styrene Butadiene Rubber (SBR)

20 types of sythentic rubber

Other than naturalrubber, all the othertypesofrubberaresyntheticor manmade. Some of the examples of suchrubber typesinclude Polychloroprene (generally sold by the trade name Neoprene); Polybutadiene; Poly(styrene-butadiene-styrene)rubberor SBSrubber; Polyisobutylene; Silicone among others.

Synthetic rubber, like other polymers, is made from various petroleum-based monomers. The most prevalent synthetic rubbers are styrene-butadiene rubbers (SBR) derived from the copolymerization of styrene and 1,3-butadiene.

This defect arises due to the missing of cations and anions from their original lattice points in a crystal.

The last statement is a false statement regarding the given chemical reaction. Six molecules of oxygen will require only 2 molecules of carbon disulphide (CS2)

ClO²⁻ (aq) + H₂O₂ (l) — > Cl⁻ + O₂ (g) + H₂O (l)

The mole ratio is 1 : 1

Since the mole ratio is 1 :1 ;

I) Moles of ClO²⁻ = moles of H₂O₂The moles of H₂O₂ that will be oxidized by 1 mole of ClO²⁻ is 1 mole.

Firstly it'simportanttounderstandwhat a rate ofreaction is. When areactionoccurs, molecules are colliding together with enough energy for reactants to be broken down or changed into a new species known as a product (often thereismore than one products).

to remove the layer of magnesium oxide

Aqueous solution of sodium chloride.

Properties that can help distinguish a colloidal solution:1)The particles in a colloidal solution cannot be viewed by naked eyes but only through an ultra microsope.2)Colloidal solutions cannot be filtered using a filter paper but rather using a parchment paper or a cell membrane.3)The solution formed in a colloidal solution is heterogeneous and not homogeneous as true solutions..4)Colloidal solutions are translucent and not transparent

Chemical reactions-The transformation of chemical substance into a new chemical substance by making and breaking of bonds between different atoms is known as Chemical Reaction.

E.g. - H2+ O2⇒ H2O

Solidsodium hydroxideis obtained from this solution by the evaporation of water. Principle — Incastner-kellnermethodNaOHis prepared by the electrolysis of aqueous solution ofNaCl(Brine).Castner-kellner cell— It is a rectangular tank of steel.Na+ ions are discharged at mercury cathode.

Limitations of Dalton's Atomic Theory: Now it is proved that the atom consists of particles like electrons, protons, and neutrons. Thus the assumption of Dalton's theory that the atom is not divisible is false. Discovery of isotopes revealed that the atoms of the same element possess different weights.

amount left when 3/4th of the reaction will be completed = 1/4th

so T¾ = 1/k*(ln[A/(A/4)])=> T¾= ln4/k

and similarly T½ = 1/k*(ln[A/A/2]) = ln2/k

ao, ratio T¾/T½ = ln4/ln2 = 2

please solve on paper

thanks

B is rhe the correct answer this question now

B.NaNh2 and alc. KOH is the write answer..

In the presence of a catalyst, the heat evolved or absorbed during the reaction remain unchanged.As a catalyst do not alter the enthalpy change, heat of the reaction.

Acatalystis an agent or compound that is added to a process to make a chemical reaction happen more quickly. Thecatalyst can increase the reaction rate of the steam and can participate in the secondary reactions. The packing can also act as acatalystto enhance desired chemical transformations.