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3851.

A residential area or an industrial area. which has cleaner air and why?

Answer»

A residential AREA may have cleaner air as compared to industrial area because EXPLANATION:Because industrial AREAS are producing ENOUGH harmful chemicals than residential areas.And their are MANY more things

3852.

The changes which are useful to us are called​

Answer» CHANGES which are useful is CALLED useful change example ripening of fruits. Changes which are harmful is called harmful changes RUSTING of iron.Explanation:PLEASE my answer CORRECT for thanks
3853.

Which 2 school of thought prevailed regarding the nature of the matter​

Answer»

MATTER IS MADE UP OF PARTICLES. For a LONG time, two schools of thought prevailed regarding the NATURE of matter. One school believed matter to be continuous like a BLOCK of WOOD, whereas, the other thought that matter was made up of particles like sand.

3854.

Gases can be liquified by : - increasing pressure -decreasing temperature -both a and b -deacreasing pressure

Answer»

both a and BPLS FOLLOW and GIVE BRAINLIEST MARK

3855.

Do you think we can libe without plastic ?Describe one day of your life ,beginning from morning , when you will not use plastic . Write how will you go about doing your daily chores and what substitute objects will you use.​

Answer»

tion:No! I thing that we can't LIVE without plastic because if there WOULD be no plastic in our life FRM morning so there would not be HALF of the work will be stopped there will be no phone cover, refrigerator outer plastic cover , & many more so there is impossible without plastic ....Hope it HELP

3856.

Purity of a solid substance can be checked by its: O Boiling pointO Melting pointO Solubility in waterO Solubility in alcohol​

Answer»

ity of a solid substance can be checked by its:(b) MELTING POINT- The purity of a substance can be checked by its physical PROPERTIES like melting point, boiling point, ETC.- SINCE the given substance is solid, it first starts melting on REACHING its melting point.- If it has impurities, its melting point will be DIFFERENT.- So, its melting point is the easiest and the best way to find its purity.

3857.

Which one is a sublime substance?O Table saltO SugarO lodineO Potassium iodide​

Answer»

At STANDARD, ATMOSPHERIC pressure, a few SOLIDS which will SUBLIME are iodine

3858.

Boyle's law states that the: O Pressure of a gas is directly proportional tothe temperature at constant volumeO Pressure of a gas is inversely proportionalthe volume at constant temperature0 Volume is directly proportional to thetemperature ot constant pressure.0 None of the above​

Answer» VOLUME is DIRECTLY proportional to the temperature at CONSTANT PRESSURE .
3859.

Question 2 The boiling point of alcohol is 78°C. What is this temperature in Kelvin scale:O 373 KO 351 KO 375 KO 78 K​

Answer»

t is 351 K in KELVINSCALE

3860.

Which of the following has a charge of +1 and a mass of 1 amu?

Answer» 1AMU MEANS 1 ATOMIC mass UNIT
3861.

What happens when we put a cup of hot coffee at the table?​

Answer»

the hotness of the COFFEE i.e. TEMPERATURE DECREASE and thus it becomes cold

3862.

Why are ice slippery?​

Answer»

tion:The "slippery" nature of ice is generally attributed to the FORMATION of a thin LAYER of liquid water GENERATED by friction, which for instance allows an ice skater to "surf" on top of this liquid film. ... The mystery of SLIDING on ice can therefore be found in the "viscous" nature of this film of water. hope it helps plzz mark as brainliest ✌️✌️

3863.

Why are crystals rare?​

Answer» EXPLANATION: The answer is twofold: erosion and mixed composition. Wind, rain, and water flow have a WAY of KNOCKING and mixing around things here on earthI hope this will help you
3864.

Write an equation for each of the following 1. Oxidation 2. Reduction 3. Redox reaction Whosoever will give correct answer I will mark him/her brainliest

Answer» ILL SAY MARK me as the brainliestExplanation:oxidation=C+O^2=CO2reduction = ZnO2=zn+O2redox reaction = MgO2 + C = CO2 + Zn
3865.

A mixture of ZnCl_2 and PbCl_2 can be separated by:

Answer»

The MIXTURE is non-homogeneous mixture so it was SEPARATED by METHOD of CRYSTALLIZATION.

3866.

What does chemical formula represent three major points​

Answer»

We encounter CHEMICAL substances and COMPOUNDS everyday. The substances under the kitchen sink that we use to clean our houses as well as those that are staples in our medicine cabinet are made up of chemical substances. These CHEMICALS are made up of a fixed proportion of atoms, and these atoms are arranged in a certain way. In ORDER to figure out what these proportions are and how they are arranged for any given SUBSTANCE, we need to know the chemical formula of the substance or compound.

3867.

acids and bases react to produced salt and hydrogen.this solution is . salt and hydrogen, salt and oxygen , salt and water.​

Answer» EXPLANATION:When an acid and a base are combined, water and a salt are the products. Salts are ionic compounds containing a positive ion other than H+ and a negative ion other than the hydroxide ion, OH−. Double displacement reactions of this type are called neutralization reactions. We can write an expanded VERSION of this equation, with aqueous substances written in their longer form: H+(aq)+Cl−(aq)+NA+(aq)+OH−(aq)→Na+(aq)+Cl−(aq)+H2O(L) PLEASE mark it as brainliest
3868.

Name any two states in india where jute is manually grown?​

Answer»

e CROP is grown in nearly 83 DISTRICTS of seven states - West Bengal , Assam , Orissa , BIHAR , Uttar Pradesh , Tripura and Meghalaya

3869.

Iodine can be separated from a mixture of iodine and common salt by the process of _____.​

Answer» TION L GUESS... ........
3870.

1 the pH of an acid is​

Answer»

77777777777777777777777777777

3871.

Constituent of a ______can be separated out by physical means​

Answer»

Constituent of a *mixture* can be separated by physical means.Because , in mixture particles are just mixed TOGETHER they do not have atomic force between them and can be EASILY separated from each other.But, if the particles have atomic force between them like COMPOUND than it cannot be separated by physical means because atomic force is very strong and can be separated only through chemical reactionsHOPE IT HELPS YOU PLZ mark as BRAINALIST.

3872.

The constituent of impure substance may be in______ ratio.​

Answer»

1:1Explanation:I THINK it willbehelpful

3873.

Smog is the mixture of smoke and ______.​

Answer»

Smog is the mixture of smoke and FOG in the air. Details about smog:Smog is a type of air pollution. The word 'smog' was firstly coined in the early 20th century and its a contraction of the two word smog and fog. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke and sulfur dioxide.What are smog made up of? Smog are composed of nitrogen oxides, sulphur oxides, ozone, smoke and other particulates. There are ALSO man-made smog that are derived from coal combustion emissions, vehicular emissions, industrial emissions, forest and agricultural FIRES and photochemical reactions of these emissions.Smog formed? Smog are formed by atmospheric pollutants or gases. I more POINT to be noted-:When sunlight and heat react with these gases with some FINE particles Smog are formed. ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀~ ThesnoWyprince

3874.

Smog is the mixture of smoke and what

Answer»

ixture of AIR pollution MAINLY SMOKE and FOG in the air

3875.

Calculate the percentage of nitrogen in urea

Answer» PERCENTAGE of NITROGEN in UREA is 46.66 %.To calculate the percentage composition of an ELEMENT in a compound, we use the equation:Putting values in above equation, we GET:Hence, percentage of nitrogen in urea is 46.66 %.
3876.

explain the properties of particle that determine the physical state of matter. please give me answer​

Answer»

mark me as Brainliest and FOLLOW MEExplanation:Particles in a: gas are well separated with no regular ARRANGEMENT. LIQUID are close TOGETHER with no regular arrangement. solid are tightly packed, usually in a regular PATTERN.

3877.

Name the 7R’s which make the difference in our environment.

Answer»

To help us lead a LIFESTYLE that is FOCUSED on resource management we can use a few more words that also start with the letter “r” as a guide. They are reuse, REPURPOSE, ROT, repair, return, refill and refuse which are also called the “7 R's.The 7 R's: Refuse, Reduce, Repurpose, Reuse, Recycle, Rot, RethinkHope it helps youPls mark me brainliest

3878.

Write a short note on acetate fibres

Answer»

Acetate fibers are one of the principal TYPES of synthetic fibers. The FIBER forming substance is cellulose acetate in which at least 92% of the HYDROXYL groups are acetylated. This fiber is called triacetate or triacetate cellulose. Secondary acetate CONTAINS only about 76 percent acetylated cellulose groups.#GUNDI..✌✌

3879.

Explain why are plastic containers are favoured for storing food?

Answer» TION:Plastic containers seem more CONVENIENT than metal containers. This is because of their light WEIGHT, LOWER price, good strength and easy handling. Being lighter as compared to metals, PLASTICS are used in cars, aircrafts and spacecrafts also.I hope it may help you Mark me as a brainlist.
3880.

Advantages of chemical changes​

Answer» TION:ADVANTAGE-Chemical Reactions helps US to find new products which can be useful for FUTURE inventions in a great way. DISADVANTAGE-Chemical Reactions cost us a lot of time and money for buying various chemicals and their instruments and sometimes harmful product may be PRODUCED which may harm us and our environment.Aug 8, 201
3881.

Write a short note on ceramic fibres

Answer»

Ceramic fibres are small-dimension filament or thread composed of a ceramic material, usually alumina and silica, used in lightweight units for electrical, thermal, and sound insulation;Explanation:The USE of ceramic fibers in the composite applications is taking attraction/attention since the last decades. In particular, continuous ceramic fibers/filaments are generally employed in high-temperature applications instead of metals due to their high thermal tolerance and CORROSION resistance. Ceramic fibers may be produced in various forms like blankets, felts, bulk fibers, vacuum-formed or CAST shapes, paper, and textiles depending on the application area [55]. The existence of ceramic fibers considerably improves both PHYSICAL and mechanical properties of CMCs and satisfies the unity of the composites through matrix cracking that leads to the increase of composite's tolerance to failure. From the point of view of industrial implementation, ceramic-fiber-reinforced composites are utilized in many different commercial products such as aircraft ENGINE components (turbine combustors, compressors, and exhaust nozzles), automotive and gas turbine elements, aerospace missiles, heat exchangers, hot gas filters, rocket nozzles, gasket, and wrapping insulations [55,56].There are plenty of studies available in the literature that focus on the performance of various ceramic fibers in CMCs. Depending on the requirements (mechanical, physical, or thermal), oxide, nonoxide, or other types of ceramic filaments find applications in many cases.

3882.

What is a solution?name its particles

Answer»

tion:It is a homogeneous MIXTURE. The SIZE of solute particles in the SOLUTIONS is extremely small. It is less than 1 nm in DIAMETER. The particles of a solution cannot be seen even with a microscope. The particles of a solution pass through the filter papermark my ans as BRAINLIEST

3883.

4. The ions of ammonium, magnesium and aluminium are represented as given below.Draw similar patterns for ferrous, ferric, sodium and zinc ions.​

Answer» EXPLANATION:PLS FIND THE ATTACHMENT THANKS
3884.

Aaisa kis kis ke saath hotha hai guy's​

Answer» EXPLANATION:  MERE SATH HUA HAIExplanation:
3885.

I was asking difference between addition polymer and copolymer

Answer»

According to the TYPE of monomers, there are two major types called Homopolymers and Copolymers. The main DIFFERENCE between polymer and copolymer is that polymer is any GIANT molecule made out of same or different monomers WHEREAS a copolymer is a polymer made out of different monomers. PLZ MARK ME AS BRAINLIEST ANSWER

3886.

4. The main cause of air pollution is A. Bird droppings B. Solid rubbish C. Oil spills

Answer» B is the RIGHT ANSWER of this QUESTION
3887.

1. Define air 2. State the composition of air 3. List four properties of air 4. List three air pollutants and their sources 5. Why is air a mixture and not a compound the most reasonable answer i will mark it the brainliest

Answer»

air is a INVISIBLE wave force which can't be SEEN

3888.

Hey what is the difference between copolymer and addition polymer and are condensation polymer and copolymer the same

Answer»

Difference Between Copolymer and Condensation POLYMER. The key difference between copolymer and condensation polymer is that the copolymers FORM VIA copolymerization whereas the condensation POLYMERS form via condensation reactions.

3889.

A the pit of 1.4 into 10 to the power - 2 H NaoH is​

Answer»

it is a CHEMICAL combinationExplanation:HOPE it will HELP you

3890.

please write a report writing the one who will do so i will follow him and mark as brainliest. i need it by tomorrow​

Answer» ALF QUESTION PLZ SEND it FULL
3891.

Define alkalies anyone who will answer I will make him/her brainliest ​

Answer» ALKALIES are those BASES which is SOLUBLE in WATER .. all alkalies are BASE but all base are not alkalies
3892.

Similarity between homogeneous and heterogeneous mixtures

Answer»

in homogeneous MIXTURE PARTICLES are fine and cannot be seen. example water and milk.in heterogeneous mixture particle are are not fine and differ in SIZES. and individual particles can be differentiated. example sand and gravel.hope this was helpful.please MARK me as brainliest.

3893.

Write the IUPAC name of the compound ​

Answer»

answer is BROMINE oxideExplanation:HOPE it helps YOUMARK ME AS THE BRAINLIEST

3894.

Which of these solutions have same molar concentration? a) 49g H2SO 4 per litre of solution b) 49g H3 PO 4 per litre of solution c) 73g HCl per litre of solution d) 63g HNO3 per litre of solution.

Answer»

A few SUBSTANCES are ARRANGED in the increasing ORDER of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) WATER, air, wind (b) Air, sugar, oil (C) Oxygen, water, sugar (d) Salt, juice,airA few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice,airA few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice,airExplanation:A few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugarA few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice,air (d) Salt, juice,airA few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement ? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, water, sugar (d) Salt, juice,air

3895.

Find out the number of protons, electrons and neutrons in the element 107Ag14?

Answer»

electrons=protons=107neutons=93 HOPE it's RIGHT ANS MARK me as BRAINLIEST if it is

3896.

Change of gaseous state directly to solid state without going through liquid sate is called _____________________ .

Answer»

The PROCESS is KNOWN asSUBLIMATION..~HOPE this HELPS

3897.

Water droplets seen on the outer surface of a glass containing ice-cold water is due to _____________ .

Answer»

It's because of CONDENSATION

3898.

Do attempt any one on the task assigned below. guidelinesTask 1.Make a PowerPoint Presentation(10-15 slides)Topic - Sustainable city model-Delhi in 2050.a. What is sustainable development and its importanceb. Citizens contributionC. Government's roled. Strategy to be adopted in coming yearse. Features of Sustainable cityf. Case study of any one sustainable city across the globeg. Conclusion​

Answer»

........mmsbbj

3899.

Please give me the answers to the below questions. 1. ________ is the maximum amount of solute which can dissolve in _______ g of water at a fixed __________ 2. The factors affecting solubility are; Type of _________ Type of _________ 3. Substance A and B are mixed and filtered. B completely dissolves in water. Substance A is ________ Substance B is ________

Answer»

RATURE PRESSURE

3900.

. Give the characteristics of the particles of matter.

Answer»

1)The PARTICLES of matter are very, very small.2)The particles of matter have SPACE between them.3)The particles of matter are constantly moving.4)The particles of matter ATTRACT each other.