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1. Sour substances are acidic in nature,i.e, they have acids in them. So, when they are kept in brass or copper vessels, they react with them and form poisonous or better to say toxic elements which may prove harmful for the human body. So they are not kept in metal containers. 2. When acid is dissolved in water it dissociates into ions thus it conducts electricity due to the presence of ions. But alcohol is a very weak acid does not dissociate into ions and so it does not conduct electricity. Glucose, when dissolved in water, does not produce ions so it does not conduct electricity.3. Dilution of concentrated acid is an exothermic process. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. On the other hand, adding acid to water, the solution that forms is very dilute and the small amount of heat released is not enough to vaporize it.

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Purpose of Making AlloysPure metals possess few important physical and metallic properties, such as melting point, boiling point, density, specific gravity, high malleability, ductility, and heat and electrical conductivity. These properties can be modified and enhanced by alloying it with some other metal or nonmetal, according to the need.

Alloys are made to:

Enhance the hardness of a metal: An alloy is harder than its components. Pure metals are generally soft. The hardness of a metal can be enhanced by alloying it with another metal or nonmetal.

Lower the melting point: Pure metals have a high melting point. The melting point lowers when pure metals are alloyed with other metals or nonmetals. This makes the metals easily fusible. This property is utilized to make useful alloys called solders.

Enhance tensile strength: Alloy formation increases the tensile strength of the parent metal.

Enhance corrosion resistance: Alloys are more resistant to corrosion than pure metals. Metals in pure form are chemically reactive and can be easily corroded by the surrounding atmospheric gases and moisture. Alloying a metal increases the inertness of the metal, which, in turn, increases corrosion resistance.

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the answer of this question is 2-methlypentane

The product is. CH3 CH3 | | CH3 - C -C - CH3 | | CH3 CH3

(c) 91.Acetone,CH3COCH3

2.Propionaldehyde,CH3CH2CHO

3.Allyl alcohol,H2C=CHCH2OH

4.Prop-2-en-1-ol,H2C=C(OH)CH3(the enol tautomer of acetone)

5.Prop-1-en-1-ol,HOCH=CHCH3(the enol tautomer of acetaldehyde)

6.H2C=CHOCH3, methyl vinyl ether

7.Cyclopropyl alcohol

8.Propylene oxide

9.Trimethylene oxide

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Among the numerous types oforganic compounds,four majorcategories are found in all living things: carbohydrates, lipids, proteins, and nucleic acids.

Pentan-2-one, I think

As it doesn't react with tollen reagent hence it is either aldehyde or ketoneAs it reacts with NaOIHence pentane 2 one as one methyl group only required.

Thecompoundsin solid, liquid or gaseous state which containcarbonin its molecule are known asorganic compounds.Thereare a large number oforganic compoundsand therefore a proper systematicclassificationwas required.Organic compoundscan be broadlyclassifiedas acyclic (open chain) or cyclic (closed chain).

(1) Acyclic or open-chain compounds:Organic compounds in which all the carbon atoms are linked to one another to form open chains (straight or branched) are called acyclic or open chain compounds. These may be either saturated or unsaturated.

Cyclic or closed-chain compounds:Cyclic compounds contain at least one ring or closed chain of atoms. The compounds with only one ring of atoms in the molecule are known as monocyclic but those with more than one ring of atoms are termed as polycyclic. These are further divided into two subgroups.

Homocyclic or carbocyclic :These are the compounds having a ring or rings of carbon atoms only in the molecule. The carbocyclic or homocyclic compounds may again be divided into two types:

Alicyclic compounds:These are the compounds which contain rings of three or more carbon atoms. These resemble with aliphatic compounds than aromatic compounds in many respects. That is why these are named alicyclic, i.e., aliphatic cyclic. These are also termed as polymethylenes

Aromatic compounds:These compounds consist of at least one benzene ring, i.e., a six-membered carbocyclic ring having alternate single and double bonds. Generally, these compounds have some fragrant odour and hence, named as aromatic (Greek word aroma meaning sweet smell).Non-benzenoid aromatics: There are aromatic compounds, which have structural units different from benzenoid type and are known as Non-benzenoid aromatics e.g. Tropolone, azulene etc.b)Heterocyclic compounds:Cyclic compounds containing one or more hetero atoms (e.g. O, N, S etc.) in the ring are called heterocyclic compounds. These are of two types:

Alicyclic heterocyclic compounds:Heterocyclic compounds which resemble aliphatic compounds in their properties are called Alicyclic heterocyclic compounds

Aromatic heterocyclic compounds:Heterocyclic compounds which resemble benzene and other aromatic compounds in most of their properties are called Aromatic heterocyclic compounds

The ion formed after removal of Hydrogen ion (H⁺ ion) from an acid is called acid radical.

Ex: When HCl loses H⁺ ion, it forms Cl⁻ which is an acid radical.

Sodium chloride is formed when sodium atoms interact with chlorine atoms. When this occurs, sodium will donate an electron to chlorine. This makes sodium slightly positive and chlorine slightly negative. Sodium ions will attract chloride ions and form an ionic bond that's why they called ionic compound.

Ionic Bond:1. Formed between metal and non metal. 2. Do not have definite shape. 3. High melting point.

Covalent Bond:1. Formed between two non metals. 2. Have definite shape. 3. Low melting point.

Thisisbecause hydrogen's characteristicsarevery similar to halogens and alkali metals. Other keylimitationsinMendeleev periodic table werethat the atomic number in thetable wasnot shown increasing in a regular pattern and the symmetry of thetable wasalso disturbed.

Mendeleev Periodic Table – We all know that there are118 elementspresent in our periodic table. Out of these118 elements, 94 elements are natural elements and24 elementsare synthetic elements. Back in the year 1800, only30 elementswere known.

1. (i) X(NO3)2 (ii)XSO4 (iii)X3(PO4)2 (iv)Group II (v)It will form an ionic bond since it is a metal.

1 mole of NaOH contains. 22.4 litres? mole of NaOH contains 4. litres(use unitary method to solve)

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plz solve it full

Please refer to this similar solution!

solvent is a liquid capable of or used for dissolving something. When the solvent has dissolved as much solute as it can, it is a saturated solution. A solvent is the liquid or solid which is the basis for a solution.

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Soap : It is sodium or potassium salt of fatty acid.Hard water contains bicarbonates, chlorides and sulphates of calcium and magnesium which react with soap molecules forming insoluble precipitates called scum. Hence, strength of soap molecules are lost in the chemical reaction and they are not available for cleansing action.

The dirt present on clothes is organic in nature and insoluble in water. Therefore, it cannot be removed by only washing with water. When soap is dissolved in water, its hydrophobic ends attach themselves to the dirt and remove it from the cloth. Then, the molecules of soap arrange themselves in micelle formation and trap the dirt at the centre of the cluster. These micelles remain suspended in the water. Hence, the dust particles are easily rinsed away by water.

This is the structure of micelle, when soap is dissolved in hydrocarbon. This happen when we wish to remove grease or oil strains and apply soap solution on it.

A one molal solution contains 1 mole of solute per 1000 g (1 kg) of solvent. To prepare a one molal solution of sucrose you would weigh one mole of sucrose into a container and add 1000 g water.

Soap is a mixture of sodium salts of various naturally occurring fatty acids. Air bubbles added to a molten soap will decrease the density of the soap and thus it will float on water. If the fatty acid salt has potassium rather than sodium, a softer lather is the result.

Soap is produced by a saponification or basic hydrolysis reaction of a fat or oil. Currently, sodium carbonate or sodium hydroxide is used to neutralize the fatty acid and convert it to the salt.

General overall hydrolysis reaction:

fat + NaOH ---> glycerol + sodium salt of fatty acid

Although the reaction is shown as a one step reaction, it is in fact two steps. The net effect as that the ester bonds are broken. The glycerol turns back into an alcohol (addition of the green H's). The fatty acid portion is turned into a salt because of the presence of a basic solution of the NaOH. In the carboxyl group, one oxygen (red) now has a negative charge that attracts the positive sodium ion.

Types of Soap:The type of fatty acid and length of the carbon chain determines the unique properties of various soaps. Tallow or animal fats give primarily sodium stearate (18 carbons) a very hard, insoluble soap. Fatty acids with longer chains are even more insoluble. As a matter of fact, zinc stearate is used in talcum powders because it is water repellent.

Coconut oil is a source of lauric acid (12 carbons) which can be made into sodium laurate. This soap is very soluble and will lather easily even in sea water.

Fatty acids with only 10 or fewer carbons are not used in soaps because they irritate the skin and have objectionable odors.

Synthetic detergents have similar molecular structures and properties as soap. Although the cleansing action is similar, the detergents do not react as readily with hard water ions of calcium and magnesium. There are over a thousand synthetic detergents available in the United States. Detergent molecular structures consist of a long hydrocarbon chain and a water soluble ionic group. Most detergents have a negative ionic group and are called anionic detergents. The majority are alky sulfates. Others are "surfactants" (from surface active agents) which are generally known as alkyl benzene sulfonates

(a)

(b)

1/12th part of 1 carbon is known as atomic mass

Chemical Names:Aspirin;ACETYLSALICYLIC ACID; 50-78-2; 2-Acetoxybenzoic acid; 2-(Acetyloxy)benzoic acid; O-Acetoxybenzoic acid More...Aspirinis a Nonsteroidal Anti-inflammatory Drug and Platelet Aggregation Inhibitor. The mechanism of action ofaspirinis as a Cyclooxygenase Inhibitor

Mass of solute - NaCl =40gmMass of solvent - water =320gmMass of solution =(40+320) gm=360gmConcentration in terms of Mass by mass percentage =mass of solute /mass of solution *100=40/360*100%=11.11%

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Mass of solute - NaCl =40gmMass of solvent - water =320gmMass of solution =(40+320) gm=360gmConcentration in terms of Mass by mass percentage =mass of solute /mass of solution *100=40/360*100%=11.11%

Mass of solute - NaCl =40gmMass of solvent - water =320gmMass of solution =(40+320) gm=360gmConcentration in terms of Mass by mass percentage =mass of solute /mass of solution *100=40/360*100%=11.11%

Let me know if there is a catch and I'll correct it.

Explain me when in first case arrow shifts to carbon bond but in 2nd case why you have not drawn the double bond in carbon ( functional group wala)

Right.that picture has a pi bond missing from the aldehyde carbon.I hope this sets it right.Do approach for further clarifications.

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Mass of CO2= 22g

Molecular mass of CO2=44g

Number of moles = Mass / molecular mass = 22/44 = 0.5 moles

So, in 22g of CO2contains 0.5 moles.

molecular mass of carbon tetrachloride is 153.8mass of cl=35.45 And carbon = 12. So ccl4= 12+4*35.45 =153.8so 154 g of ccl4 makes 1 moleso 22 g of ccl4 will make (22/154) moles =0.14 moles

please refer to the uploaded ans

please refer to the uploaded ans

Percentage of Sodium [Na] in Sodium Carbonate [Na2CO3] = 46/106 x 100 =43.40%.

copper pyrite is CuFeS2.

so, molar mass of this = 183gand mass of iron is = 56g

now, %age iron is =56*100/183 = 30.60%

Mass of solution= 100 g +1g=101 gMass of solute= 1 gMass percentage= 1/101×100=100/101=0.99%

molecular Mass of CCl4 = 12 + 4×35.5 = 154(mass of carbon = 12 mass of chlorine = 35.5)154g of CCl4 = 1 mole22g of CCl4 = 22/154 = 0.1428 mole

carbon tetrachloride has the molecular weight is 154(12+142)g/mole

so 1 mole has 154gmsfor 22 gms we can see thatx = 22/154= 1/7 moles

thus 22g of ccl4 is 1/7th of a mole

i) and ii) The oxidation of alcohols is done usimg acidified sodium orpotassium dichromate(VI) solution. This reaction is used to make aldehydes, ketones and carboxylic acids, and as a way of distinguishing between primary, secondary andtertiaryalcohols.

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Distilled watercannotconduct electricitybecause itdoes notcontain ions while rainwater conducts electricityas it contains ions due to presence of dissolved salts in it.

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