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u ever been in an empty hall and tried to speak with your friend? you will notice that you both are not able to speak to each other clearly because you may listen to your echo while your friend is saying something to you. so in that CASE we can SAY that reflection of SOUND is UNDESIRABLE(except the case if you’re enjoying listening to your echo). NOTE: reflection of sound is responsible for echo.please mark me as brainliest

re the WAYS to CONSERVE FOREST..HOPE it HELPS..

nthesis. The leaves of the tree have a huge job in the life of a tree. ... By USING carbon dioxide during the photosynthesis process, trees and other plants reduce the amount of carbon dioxide in our ATMOSPHERE and makes the atmosphere SAFER for US. Trees rely on us for carbon dioxide and we rely on them for OXYGEN.

ter is treated with Sodium Hydroxide, Glycerol (Ethanol) and a Sodium salt of Carboxylic ACID (Sodium Ethanoate) is formed.CH3COOC2H5 + NaOH → CH3COONa + CH3CH2OH (This reaction is CALLED Saponification reaction because it is used in the preparation of SOAPS) Definition of saponification. 1 : the hydrolysis of a FAT by an alkali with the formation of a SOAP and glycerol. 2 : the hydrolysis especially by an alkali of an ester into the corresponding alcohol and acid broadly : hydrolysis.

of Air pollution. 1. Burning of FOSSIL Fuels: Sulfur dioxide emitted from the combustion of fossil fuels like coal, PETROLEUM and other factory combustibles is one the major cause of air pollution. Pollution emitting from vehicles including trucks, jeeps, cars, trains, AIRPLANES cause immense amount of pollution ...Causes of Water Pollution. Water pollution is caused due to several reasons. Here are the few major causes of water pollution: Sewage And Waste Water: Sewage, garbage and liquid waste of HOUSEHOLDS, agricultural lands and factories are discharged into lakes and RIVERS.

GES:They are used in preparation of curd,bread,cake etc. (e. g)the bacterium Lactobacillus promotes the formation of curd from milk.The bacterium Renin is used in cheese PRODUCTION.Yeast( saccharomyces cerevisiae) is used for the purpose of baking bread. Since, it is also known as ‘baker’s yeast’.2 . They are used in the production of alcohol from :Sugar or starchWine from fruit juiceBy the process called fermentation.3. In the cleaning of the ENVIRONMENT by breaking down the organic waste into HARMLESS and usable substances.(e. g)Anaerobic bacteria degrade the animal dung into biogas and the left-over slurry can be used as manure.4. Many microorganisms (bacteria, fungi and moulds) produce certain chemicals which inhibit the growth of some other microorganisms. Such chemical compounds are known as antibiotics. PENICILLIN, Streptomycin,Tetracycline, Erythromycin and Gramicidine are some common antibiotics which is used to cure many microbacterial diseases.DISADVANTAGES:It causes many types of diseases in humans.Clostridium tetani is a pathogenic bacterium that causes tetanus.AIDS that is caused by HIV virus.Maleria is caused by parasite plasmodium.TUBERCULOSIS is caused by a bacterium-called Mycobacterium tuberculosis.

s of:GRAVITATIONAL FORCE = Nm^2/kg^2Weight = NEWTON PRESSURE = PASCAL

6Mg'Z=12Orbits= K(2), L(8), M(2)VALENCY= 2 Group No.=2Block= sMg+S=MgS, (S's velocity is 2MgCl2

the electric appliencesreduce the usage of PESTICIDES and fertilizersrecycle the WASTE productstake HEALTHY food

ffic police is wearing a mask brcause of the dust PARTICLES and the hatmful gases in the air... SIMPLY the man is preventing these harmful toxic chemicals like CO2 from entering his lungs because it can cause breathing problems like asthama and MANY other lung problems...HOPE it HELPS:)

that it is a GOOD PARTY before MANY YEARS.

YOUR ANSWER MY FRIEND

ulfill her NEEDS so that she may get a feeling that you can UNDERSTAND her feelings .she may SHARE her feelings with you and PROBLEMS too...........

nomenon in which compounds having different STRUCTURAL FORMULA have same molecular formula is CALLED ISOMERISM.

e here is ur ANSWER! These one-cell organisms are responsible for illnesses such as STREP throat, urinary tract infections andtuberculosis. Viruses. Even smaller than BACTERIA, viruses CAUSE a multitude of diseases — RANGING from the common cold to AIDS.Hope it's help for you!

dy here is ur answer!Rainwater may leak in through roofs, windows, or other damaged AREAS. While clean WATER does not bring in contaminants with it, it can become a breeding ground for bacteria if notcleaned up QUICKLY. CONTAMINATED sources of standing water include FLOODING and sewage backups.I hope it help for u❤️

e here is your answer.....The human respiratory system is a series of organs responsible for TAKING in oxygen and expelling carbon dioxide. The primary organs of the respiratory system are lungs, which CARRY out this EXCHANGE of GASES as we breathe......Hope it helps ✌ ✌ ✌ ✌ Please give thanx.....#follow

dent! Q. Potential difference Electric Potential Difference both are same.Ans:- The (electric) potential difference between two POINTS in an electric field is the AMOUNT of work done in moving a UNIT POSITIVE charge from one point to the another point.I hope it's help for you! ♥♥

is HELPS you

ight answer I think it HELP you if yes GIVE brainli

e here is ur answer. HYPERMETROPIA : Long sightedness. An abnormal condition of the eye in which vision is better for distant objects than for near objects. It RESULTS from the EYEBALL being too short for light rays to properly focus on the retina, thus forming a blurred image.Hope it's help for you.Mark as a BRAINLIST.

e following statements the red colour used during RANG panchami CONTAINS high proportion of lead is True. USING the chemical-mixed colors for HOLI and Rang Panchami can cause and the expert said that they contains SOLVENTS such as tetrathyline as well as lead.

ses of POLLUTION are not just LIMITED to fossil fuels and carbons emissions. There are many other types of pollution including chemical pollution into bodies of water and soil through improper disposal practices and agricultural activities, and noise and light pollution CREATED by CITIES and urbanization as a result of population growth.

=ACETIC ACID CHEESE =FUNGI

ia.tuberculosis.oral THRUSH, a fungal INFECTION in the mouth or throat.cytomegalovirus (CMV), a type of herpes virus.cryptococcal meningitis, a fungal infection in the brain.toxoplasmosis, a brain infection CAUSED by a parasite.cryptosporidiosis, an infection caused by an intestinal parasite.

═══════════════╕☬‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌‌‌ ‌ ‌ ‌ ‌ ‌ YOUR ANSWER ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ☬╘═════════════════════╛Let the x gram gas is mixed MOLE of ethane = Mole of HYDROGEN = x/2mole fraction of hydrogen = = mole fraction of hydrogen = 15 : 16 ╒══════════════════════╕☬‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌‌‌ ‌ ‌ ‌ ‌ ‌ THANKS! ‌ ‌ ‌ ‌Regards ‌ ‌ ‌ ‌‌ ‌‌ ‌ ‌ ‌ ‌ ‌ ☬╘══════════════════════╛

13th ONE on GOOGLE. 12) It is the ROUGH figure.

our answer,Diamond, graphite and fullerenes are some of the ALLOTROPES of CARBON.They are all COMPOSED of carbon but they EXIST in different FORMS. , Different forms of the same element are called allotropes.

process is called CorrosionDifferent metals have different colours whet it is corroded,Silver  - Black colour when corroded - 2Ag + O2 = AG2O ( Silver Oxide )COPPER - Green colour when corroded - 4Cu + O2 = 2Cu2O (Copper Oxide)Iron - REDDISH - Brown colour when corroded - 4Fe + 6H2O = 2Fe2O3 + 6H2 ( Iron Oxide or RUST )ThanksMENTOR90

It is an ionic compound and sodium has 11 atomic number and oxygen has 8 atomic numberTherefore 2 atom of sodium will combine with one atom of oxygen and each sodium will LOSE one electron to oxygen and therefore COMPLETING it's octet

gh RISES because YEAST added to 'maida' reproduces rapidly, and PRODUCES carbon dioxide gas while RESPIRING. This gas fills the dough and increases its VOLUME making it to rise.Based on this principle, yeast (which is a micro-organism) is used in the preparation of breads and cakes. It helps in making them spongy.

ape VELOCITY is milky way is 0.1528 KM /s Hope this HELPS mate

nol. Q,ETHENE reaction = CH3 CH2 OH--------H2SO4----- CH2=CH2+H2O

ppens because WATER is a very good conductor of electricity and electrical fires are due to the electrical APPLIANCES if we THROW water then the person throwing the water MAY also get an electric SHOCK

land is LIMITED and population is GROWING faster.I HOPE this will helpful...

pes of crowns of trees and their location on EARTH are related. For e.g. trees in hilly areas are CONICAL in SHAPE because of FALLING of snow but trees in plains are not conical in shape and are flat because snow didn't FALL here.

sugar and SALT both are dissolved in water and by filtertion only the solid particle are REMOVED not the ELEMENTS that get mixed with water ANF FORM solution. THANKS

re the only (MACHINES ) which help us a lot. If we talk about these activities, no ONE of them COULD be DONE without handsPlz mark it as BRAINLIEST

s the DOLL?the doll is in the BAG