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ANSWER:

FIBRES that are made by HUMANS are called synthetic fibres .

Plastic is a harmful substance made by humans . It doesn't decompose in the ENVIRONMENT.

Answer:

If u are not ABLE to solve a problem or give answer to a QUESTION then u must ask QUESTIONS so that others can help u.....

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ANSWER:

what will we WRITE in the QUESTION

Answer:

HEY MATE ITS YOUR ANSWER

Explanation:

oxidation and REDUCTION CONSIDERED TOGETHER as complementary processes.

"REDOX reactions involve electron transfer"

ANSWER:

(a) Magnesium chloride

–º MgCl2

(B) Calcium oxide

–º CAO

(C) Copper nitrate

–º Cu (NO3)2

d) Aluminium chloride

–º AlCl3

(E) Calcium carbonate

–º CaCO3

f) magnesium nitrate

_MgNO3

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ANSWER:

COLLIDE to WALLS of the CONTAINER

Answer:

EXPLANATION:

TRY using words that might APPEAR on the page that you’re looking for. For example, 'cake RECIPES' instead of 'how to make a cake'.

ANSWER:

Sodium CHLORIDE is a salt. It is also a COMPOUND.

ANSWER:

Fast change

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Explanation:

because SUGAR DISSOLVES in water fast.

Answer: Activity 2.1 NCERT Class 9 Science Is Matter Around Us Pure

Activity 2.1 NCERT Class 9 Science Is Matter Around Us Pure

Brief procedure:

Activity 2.1 asks us to:

prepare various solutions with different amount of copper sulphate and compare them.

Mix the different amount of copper sulphate and potassium permanganate solution and compare them.

Observation/findings:  

Different amount of copper sulphate in the solution GIVES different colour intensity.

Activity 2.1 class 9 science Is Matter Around Us PureExplanation:

Solute particles mix with the solvent and form a mixture. If there is only one type of solute particle, we CALL this mixture homogenous. If we add more than one type of particle, we call it a heterogeneous mixture. For EXAMPLE, any amount of copper sulphate in water is a homogenous mixture; while a mixture of copper sulphate and potassium permanganate in water is a heterogeneous mixture.

Colour intensity of a solution depends on the concentration of the solute and the solvent. If we add more solute particles in the solvent the colour intensity will INCREASE. ANOTHER way to increase the intensity is by reducing the amount of the solvent eg, boiling the solution. In both of the cases the concentration of solute particle increases.

The mixture of potassium permanganate (red) and copper sulphate (blue) forms a mixture which has a different composition. Such a mixture is a Heterogenous solution.

Inference /Conclusion:

This experiment shows that a homogenous mixture can have variable colour intensity.

Some facts:

Air is a heterogeneous mixture of various gases like oxygen, nitrogen, carbon dioxide.

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Answer:

0.1 molar

Explanation:

A solution of urea containing 6 G urea in ONE LITRE is. Solution : C=660=0.1 molar.

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Answer:

 The heat capacity (C) of a body of MATTER is the quantity of heat ... of 1 gram of a substance by 1 DEGREE CELSIUS (or 1 KELVIN): ... ciron=18,140J(808g)(50.0°C)=0.449 J/g°C.

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ANSWER:

Collectively the SEPALS are called the CALYX (plural CALYCES), the outermost whorl of parts that form a FLOWER.

Answer:

• No we cannot SEPARATE colloids using a FILTER paper. It is because the PARTICLES of colloids are very small that they can pass through the pores of the filter paper

Answer: Petals are brightly coloured to attract insects for pollination. Some flowers have scented and bright coloured petals, by which insects attract towards them and help in distribution of POLLEN GRAINS from one FLOWER to another flower, while there is no reason of petals to be bright in colour for sunlight as all plants do photosynthesis in the presence of sunlight.

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ANSWER:

BASIC i guess

because MILK of MAGNESIA is basic in NATURE

EXPLANATION:

SEPALS is your ANSWER....

Answer:

In chemistry, a lone pair refers to a pair of valence electrons that are not shared with ANOTHER ATOM in a covalent bond and is sometimes called an unshared pair or non-bonding pair. Lone pairs are found in the outermost electron shell of atoms. ... They are also referred to in the chemistry of LEWIS acids and BASES.

Answer:

The STRUCTURE of the OXYGEN and the sulphur ATOMS have been ATTACHED. Explanation: ... This MEANS oxygen will contain 6 electrons and the 6 protons and the sulphur will contain 16 electrons and 16 protons in their respective single atom.

Answer:

Handpicking is used to separate GRASS from mint leaves. EXPLANATION: The method used to separate TWO substances by just picking them with our hands is handpicking. This method is used only when the substances to be separated are big enough to be separated and are not LIQUID.

ANSWER:

true

true

true

true

Explanation:

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ANSWER:

NAHI PATA broooooooooooooooooooooo OK

Explanation:

An acid is a molecule or ion capable of donating a proton, or, alternatively, capable of forming a covalent bond with an electron pair. The first category of ACIDS are the proton donors, or Brønsted–Lowry acids.

General CHARACTERISTICS of Acids:

Reacts with a metal to FORM HYDROGEN gas. Increases the H+ concentration in water. Donates H+ ions. Turns blue litmus indicator red.

ANSWER:

John daldon - atomic theory

Rutherford- atomic structure and radioactivity

Mendeleev- periodic table

Avogadro- discovery of molecules

Humphry Davy- Laughing Gas

Marie CURIE- NOBEL PRIZE for radioactivity

ANSWER:

(D) VOLTAMETER IS THE ANSWER

Answer:

Sandy SOILS have GOOD drainage and aeration but poor moisture retention. LOAM - soil composed of relatively equal AMOUNT of clay, sand, and silt. Loamy soils typically have good drainage

..

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ANSWER:

CO3.................i THINK this is RIGHT

Answer:PLS MARK BRAINLIEST,ITS REQUEST

Explanation:The Coulomb, C , is the SI UNIT of charge, and is itself QUITE simple, being the charge that results from 1 Ampere of CURRENT flowing in 1 second.

ANSWER:

atom

Explanation:

it is the CORRECT answer

Answer:

Under most definitions the RADII of ISOLATED NEUTRAL atoms range between 30 and 300 pm (trillionths of a METER), or between 0.3 and 3 ångströms. Therefore, the radius of an atom is more than 10,000 times the radius of its nucleus (1–10 fm), and less than 1/1000 of the WAVELENGTH of visible light (400–700 nm)

formula of calcium SULPHITE :-

CaSO3

following info will be helpfull:-

Calcium SULFITE, or calcium sulphite, is a CHEMICAL compound, the calcium salt of sulfite with the formula CaSO3·x(H2O). Two crystalline forms are known, the HEMIHYDRATE and the tetrahydrate, RESPECTIVELY CaSO3·½(H2O) and CaSO3·4(H2O).

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ANSWER:

a is CHEMISTRY and B is PESTICIDE

Answer:

NaBr or BrNa

Explanation:

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ANSWER:

Vandor WALL FORCE or force of ATTRACTION or REPULSION

Answer:

XEROPHYTIC PLANT SURVIVE in SALINE SOIL

Answer:

1. Elements.

SODIUM, silver, tin, SILICON.

Compounds.

CALCIUM carbonate, carbon dioxide, methane

Mixtures.

soil, SUGAR solution, coal, air, SOAP, blood.

Answer:

JI haan MAI isse tadka laga DETI HOON jab namak nahi HOTA

ANSWER:

EXPLANATION:

METAL because a DIAMOND is SHINY.

ALKANES---. ( CnH2n+2). n=1 LEAST value of n

1.methane

2.ethane

3.propane

4.betane

5.pentane

6.hexane

7.heptane

8.octane

9.nonane

10.decane

alakenes start with ethene

Alkenes----(CnH2n). n=2 least value of n

1.ethene

2.propene

3.butene

4.pentene

5.hexene

6.heptene

7.octene

8.nonene

9.decene

Alkynes--- (CnH2n-2). n=2 least value of n

1.ethyne

2.propyne

3.butyne

4.pentyne

5.hexyne

6.heptyne

7.octyne

8.nonyne

9.decyne

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ANSWER:

RATIO and ATOMICITY of=H2SO4,

ANSWER:

d

Explanation:

the OXYGEN has camparatively larzer SIZE than axygen ATOM

Answer:

1......101

2.....HASSIUM 108

ANSWER:

we cannot get back oxygen from iron OXIDE through OXY method.

Explanation:

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Explanation:

CHANGE in enthalpy TAKES PLACE due to change in BOND order ............

Answer:

Hope it helps

Explanation:

Rate of MIXING INCREASES with increase in TEMPERATURE. This is because of HEAT particles of matter GETS more kinetic energy and they starts moving faster.

ANSWER:

it is IRREVERSIBLE CHANGE FRND...

ANSWER:

h20 BRO.......

EXPLANATION:

its obvious...

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HYY MATE ✌️

Formula of WATER is H2O.

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Explanation:

Humus is dark, organic material that FORMS in SOIL when plant and animal MATTER decays. When plants drop LEAVES, twigs, and other material to the ground, it piles up. This material is called leaf litter. When animals die, their remains add to the litter.

ANSWER:

By altering the SHAPE.

Explanation:

Explanation: By changing the shape of an object it can be made to float on a FLUID even if it is DENSER than that fluid. This principle is USED in ship building.