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Ans: Carbon compounds are used as fuels because of the reason that they posses high calorific value. That is on burning they produces large amount of heat. That heat can be used efficiently.

when sodium reacts with HCL NaCl is produced alongwith hydrogen gas.

2nd answer is right

2) less than copper

Melting of ice is the physical change in which physical state of water is changed from. solid to liquid. But conversion of milk into curd is chemical change as the chemical state of milk is different then that that of curd.

Andaman districtwas adistrict of India, one of threedistrictsin theIndianUnion Territory (UT)ofAndaman and Nicobar Islands. The district's administrative territory encompasses all of theAndaman Islands, which are located in theIndian Ocean(Bay of Bengal, bordering with theAndaman Sea). The district government is headed by aDeputy Commissioner, who in turn reports into the Lt. Governor of the Andaman and Nicobar Islands

Sulphur

Left to right in period size decreases and alkali and alkaline earth metals lie left in period that why there size is smaller than alkali metals

out of these three nothing can be used as all are polar solvents and sodium reacts vigoursely with these polar solvents.

Thealkaline earth metalsare dense rthanthealkali metalsdue tosmaller sizeand better backing in the crystal lattice.

The densities ofalkaline earth metaldo not show any regular trend with increasing atomic number.

The density of thesemetalfirst decreases from Be to Ca and then increases from Ca to Ba.

25

One atom of sulfur has a mass of 32.07 amu; one mole of S atoms has a mass of 32.07 g. For compounds, the molecular mass (in amu) is numerically the same as the mass of one mole of the compound in grams

Ans :- I) they same functional group.(ii)they have similar chemical properties.(iii)They are represented by a general formula(iv)successive member differ by -CH2unit.

LIKE THE SOLUTION

In organic chemistry, a homologous series is a series of compounds with the same functional group and similar chemical properties in which the members of the series differ by the number of repeating units they contain

The word, “polyatomic” means “many atoms”. Apolyatomicion, therefore, is an ion that is made of more than one atom. An example of apolyatomicion is the sulfate ion, SO42. Sulfate is composed of one sulfur atom and four oxygen atoms and overall sulfate has a negative two charge.

In organic chemistry, a homologous series is a series of compounds with the same functional group and similar chemical properties in which the members of the series differ by the number of repeating units they contain.

(i) Same functional group.(ii)Similar chemical properties.(iii)Regular gradation in physical properties.(iv)Successive member differ by - CH2

A homologous series is a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group. For example, methane, ethane, propane, butane, etc. are all part of the alkane homologous series.

(i)

kindly post 1 ques. at a time.kindly crop the question you need to ask

Those with two double bonds have the formula,CnH2n-2. Cycloalkenes have the general formulaCnH2(n-m).

1 mole of Cu weighs = 63.5 g

Number of mole of Cu= 76.8/63.5= 1.21moles

Given general formula isCnH2n-1For 2nd member put n = 2 in given formula

Then, we getC2H2Its a formula of ethyne

Glycerol is propane 1,2,3-triol

Acycloalkylis derived from acycloalkaneby removal of a hydrogen atom from a ring and has thegeneral formulaCnH2n-1

l think fungi is correct answer

The four most commonsoil erosionprevention methods are vegetation, geotextiles, mulch, and retaining walls.Preventing soil erosionis critical in protecting your property and exposedsoil, whether from wind, weather, running water, and even the after-affects of forest fire.

fungi is the correct answer.

I think fungi is current answer

fungi is a correct answer for this question

option b is correct answer

brophytes is the correct answer

fungi is correct answer

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So the answer of questions is Fungi

Soil erosion is prevented by fungi

Fungi is the correct answer

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The reaction between Acid and an Alcohol to produce ester as the product is called Esterification reaction. During this reaction a molecule of water is eliminated.Ex: CH₃COOH + C₂H₅OH →CH₃COOC₂H₅ + H₂OIn the above reaction Ethanoic acid reacted Ethyl alcohol to form an ester Ethyl Acetate and water molecule.

thankyou very much

1)The cell organelles plastids and mitochondria have their own genetic material.

2.If the organization of a cell is destroyed due to some physical or chemical influence, what will happen? (page 65)

Answer- If the organization of a cell is destroyed due to some physical or chemical influence then cell will not be able to perform its basic functions like digestion, excretion, respiration etc. This may stop all the life activities and the life of an individual may come to an end.

3.Why are lysosomes known as suicide bags? (page 65)

Answer- Lysosomes are called suicide bags because in case of any disturbance of their cellular metabolism they release their own enzymes to digest their own cell.

4.Where are proteins synthesized inside the cell? (page 65)

Answer- The proteins are synthesized in the Ribosome

Thank you this is answers is qiestion1

There are answers for questions 2 , 3, and 4 as indicated.

Esterificationis thereactionin which a Carboxylic acid combines with an alcohol in the presence of little concentrated sulphuric acid to form anester. Theestersso formed are pleasant smelling.

benzene ka

Easterification: Carboxylic acids -> esters The coversion is carried out using acid and alcohols. This is called the Fischer Esterification.

C2H5OH + CH3COOH --> CH3COOC2H5 + H2O

Activity: A few drops of H2So4 is added to ethanol and glacial acetic acid. They are placed in a warm water bath for at least five minutes and the contents are poured into a beaker containing water. Observe the resulting mixture. The odor is sweet and the substance formed is Ethyl acetate. This reaction is called esterification reaction.

Esterification is a chemical reaction that occurs between the acid and alcohol

Fischer esterification or Fischer–Speier esterification is a special type of esterification by refluxing a carboxylic acid and an alcohol in the presence of an acid catalyst. The reaction was first described by Emil Fischer and Arthur Speier in 1895

Areactionin which carboxylic acid combines with an alcohol to give a fruity smelling liquid calledesteris known asesterification. ... It also looks briefly at makingestersfrom thereactionsbetween acyl chlorides (acid chlorides) and alcohols, and between acid anhydrides and alcohols.

1. Nucleophile Capture

In the natural sciences aprotocolis a predefined written procedural method in the design and implementation of experiments.Protocolsare written whenever it is desirable to standardize a laboratory method to ensure successful replication of results by others in the same laboratory or by other laboratories.

Solids which comprises or consists of a cation (a positive ion) and an anion (a negative ion) can be termed as Ionic Solids. Those solids are held together by electrostatic forces. On dissolving, it dissociates into ions and moves freely in the solution. An example of an ionic solid is table salt, NaCl.