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601.

Fill ups. 1. Evaporation of a liquid at room temperature leads to______ effect. 2 . At room temperature the forces of attraction between the particles of solid substances are ___________ than those which exists in the gaseous state. 3. The arrangement of particles is less ordered in the ___________ state. However there is no order in the _________ state. 4. __________ is the change of gaseous state directly to solid state without going through the__________ state

Answer»

Answer:

1.Cooling

2.More

3.LIQUID;gas

4.sublimation;liquid

602.

What is a mixture? why do we need to seprate a mixture​

Answer»

mixture is a substance made by mixing other SUBSTANCES together. they have more more than one substance.

people separate MIXTURES in order to get a SPECIFIC substance that they need or the other thing people separate pictures to remove and required COMPONENTS .

603.

V. All the planets move around the sun in a:a) Circular pathb) Rectangular pathc) Elongated pathd) None of these​

Answer»

EXPLANATION:

planets move AROUND the sun in a circular PATH

604.

100 g calcium carbonate on heating decomposes in to x g calcium oxide and 44 g carbondioxide. Calculate the mass of calcium oxide formed.​

Answer»

ANSWER:

he was a lote of internet service founder of a lote BASED in ADVENT and a new generation that was a PART time project in which the DAY of

605.

Justify the statement.the molecules of water have more energy as compared to the molecules of ice.

Answer»

Answer:

The molecules of water have more energy as compared to molecules of ice at the same temperature. Justify this STATEMENT. ACCEPTED Answer: ... This HIDDEN energy is KNOWN as LATENT energy and because of this energy the molecules of water have more energy as compared to molecules of ice at the same temperature.....

Hope it is correct

606.

Explain how onidation , corrosion , rancidity ? apply scientific concepts in daily life.​

Answer»

ANSWER:

the metal undergoes a PROCESS called CORROSION.

Also, have you OBSERVED a bad smell emanating from food containing fats or oils....This process is called rancidity. Both these processes are everyday examples of OXIDATION reactions.

607.

ANYBODY CAN EXPLAIN WHAT IS SUPER SATURATED SOLUTION ?

Answer»

ANSWER:

Supersaturation is a solution that contains more of the dissolved MATERIAL than could be dissolved by the solvent under normal circumstances. It can ALSO REFER to a vapor of a compound that has a higher (partial) pressure than the vapor pressure of that compound.

608.

A diver is able to cut throughwater in a swimming pool. Whichproperty of matter does thisobservation show?​

Answer»

HEYA MATE HERE U GO.

A diver can easily pass through a stream of water PRESENT in a POOL. ... These spaces allow the particles of water to move away. Also, water being a liquid, has weak forces between MOLECULES. These forces can be overcome by the STRONGER FORCE exerted by the diver's body.

HOPE THIS HELPS

PLS MARK AS VRAINLIST.

609.

What would happen if we cool a saturated solution ?

Answer»

ANSWER:

hi the answer is in the explanation :)

Explanation:

If a saturated SOLUTION is cooled, then some of its DISSOLVED SOLUTE will separate out in the form of solid crystals.

pls MRK as brainliest can u plsss :)

610.

hi just choose tip or top it is a game between me and my brother if any one repote my questions i will never follow them no one will give any other answers just choose​

Answer»

ANSWER:

top

Explanation:

HOPE it HELPS you

mark it as BRAINLIEST PLZ plz plz

611.

What do you mean by establishing​

Answer»

Answer:

to found, institute, build, or bring into being on a FIRM or stable basis: to establish a university; to establish a medical practice. to install or settle in a position, place, business, ETC.: to establish one's CHILD in business. to show to be valid or true; prove: to establish the facts of the MATTER.

612.

what happens when we electrolyse copper sulphate solution with carbon electrodes at positive electrode and at negative electrode?​

Answer»

ANSWER:

The ANODE (positive ELECTRODE ) is made from impure copper and the cathode (negative electrode) is made from pure copper. During electrolysis, the anode loses mass as copper DISSOLVES, and the cathode GAINS mass as copper is deposited. A half-equation shows what happens at one of the electrodes during electrolysis.

613.

Does factory waste make rivers acidic or basic in nature?

Answer»

Answer:

Generally, the nature of the industrial activity drives the pH of a wastewater, as stated by Teresa, mining process COULD result in ACID drainage.

Mostly, the cleaning process within the INDUSTRY or waste treatment process cause acidity or alkalinity. Wine industry wastewater could be alkaline and could CONTAIN high amount of sodium. DAF waste treatment process may use lime as an acid neutralising agent which will result in alkaline wastewater. Skin processing industry generally produces alkaline and salty wastewater

614.

Why do gases have neither definite shape and not definite volume?

Answer»

ANSWER:

bjbcmn hvydxsx

Explanation:

615.

Y-3. The Arab trade with Europe was disrupted by therise of the_____in West Asia.​

Answer»

MUSLIMS

Please MARK me as the BRAINLIEST and CLICK THANKS

616.

Vegetation or trees help in soil conservation.How can we justify it?

Answer»

Answer:

vegetation or tress HOLDS soil firmly by their roots and thus checks soil errosion .It ALSO prevents the soil to get washed away by WATER rather rainwater or flood water. HENCE vegetation conserves soil

Explanation: follow me and mark me the brainliest

hope it helps u

617.

Is butter getting rancid a physical or chemical change

Answer»

ANSWER:

CHEMICAL CHANGE.............

618.

Why respiration is called as slow.combustion?​

Answer»

Answer:

PLZ MARK ME AS MBRAINLIST MATE

Explanation:

SLOW combustion is a form of combustion which consumes time and takes place SLOWLY. Cellular respiration is an EXAMPLE of slow combustion. In respiration, glucose is oxidised and carbon dioxide and energy are RELEASED in the process. This is a very similar REACTION to combustion.

619.

What is oxidising property​

Answer»

ANSWER:

ADDING OXYGEN to a CHEMICAL SUBSTANCE

620.

Nylon is used to make tents and sleeping bags.justify​

Answer»

Answer:

  • NYLON, Polyester, Taffeta
  • Nylon, Polyester, Taffeta These are the most common materials used for MUMMY sleeping bags. They are the LEAST DURABLE of the synthetic materials and are BEST for car camping or general walk-in camping. Nylon, polyester and taffeta are low cost and extremely breathable fabrics.

Explanation:

✌️please mark as brainliest answer✌️

621.

The ____ of the reactants that products are_____ chemical reaction​

Answer»

Answer:

the SUBSTANCE of the REACTANT that PRODUCT are of reactant of CHEMICAL reaction

622.

Capital of karanakta​

Answer»

ANSWER:

BENGALURU

Explanation:

The CAPITAL of KARNATAKA is Bengaluru ( BANGALORE)

623.

Are plants a chemical factory justify​

Answer»

Answer:

yes

Explanation:

plant is chemical FACTORY BECOZ plant do various PROCESSES CALLED photosynthesis in which it TAKE in co² and realise o² so plant is called as chemical factory

624.

Answer the following question what is sublimation give example ?​

Answer»

An example of sublimation is the act of a person CREATING paintings for sale INSTEAD of graffiti. Sublimation is a chemical PROCESS where a solid turns into a gas without going through a LIQUID stage. An example of sublimation is when ice cubes SHRINK in the freezer.

625.

Answer the following question state the law of conservation of mass who proposed it​

Answer»

Answer:

HEY MATE!

Explanation:

  • I HOPE TO HELP YOU!
  • PLEASE MARK ME A BRAINLIEST ANSWER!

PLEASE!!!

626.

One sentence answer why is sodium benzoate added to food ?​

Answer»

Answer:

Sodium benzoate INHIBITS the growth of POTENTIALLY HARMFUL bacteria, mold, and other microbes in FOOD, THUS deterring spoilage.

627.

What are the different chemical properties of non metals? ​

Answer»

ANSWER:

NONMETAL is typically brittle when solid and usually has poor thermal CONDUCTIVITY and electrical conductivity. Chemically, nonmetals tend to have RELATIVELY high ionization energy, electron affinity, and electronegativity. They GAIN or share electrons when they react with other elements and chemical compounds.

628.

The __ of the reactants that products are in __ chemical reaction​

Answer»

Answer:

All CHEMICAL REACTIONS INVOLVE both REACTANTS and products. Reactants are substances that start a chemical REACTION, and products are substances that are produced in the reaction.

629.

Fill in the blanks1. __ are the smallest particles of an element that can take part in chemical reaction​

Answer»

Answer:

Here's your answer mate

Explanation:

ATOM

The atom is the smallest UNIT of MATTER that can take part in a CHEMICAL reaction

HOPE IT HELPS. PLS MARK ME BRAINLIEST

630.

Please tell the answer of this questionnnnnn​

Answer»

ANSWER:

yep

Explanation:

2. don't know

3.copper sulfate

4.zinc CHLORIDE +iron

pls MARK as BRAINLIEST

631.

A solution of crystalline oxalic acid is prepared by dissolving 0.63g ofoxalic acid in 250 cc of solution.Calculate normality and molarity of solution. ​

Answer»

Answer:

Molar Mass of the OXALIC Acid = 1236 g/mole. = 5 × 10⁻³ MOLES. Hence, the molarity of the SOLUTION is 0.02 M. = 0.04 N.

Explanation:

Hope it helps you

632.

explain why melting of ice is considered to be a physical change ?give at least two points in support of your answer​

Answer»

Answer:

MELTING of ice Is considered as physical change.

The two points that support my ANSWER are:-

  • In this change no new substance is formed.
  • Water can be CHANGED BACK to ice by cooling.

Thank you

Hope it helps

PLEASE MARK AS BRAINLIEST.

633.

Which acid does the ant bite injects in the body and how can it be neutralised

Answer»

Answer:

Insect BITES and stings occur when an insect is AGITATED and seeks to defend itself through its natural defense mechanisms, or when an insect seeks to feed off the BITTEN person. Some insects inject formic acid, which can cause an immediate skin reaction often RESULTING in redness and SWELLING in the injured area. Stings from fire ants, bees, wasps and hornets are usually painful, and may stimulate a dangerous allergic reaction called anaphylaxis for at-risk patients, and some wasps can also have a powerful bite along with a sting. Bites from mosquitoes and fleas are more likely to cause itching than pain.

I HOPE THIS IS HELPFUL TO YOU

634.

How to know bond type by vbt ? Eg SO2 have two sigma and 1 p pi dpi and 1 p pi and pi bond. How do we know this from VBT ? Plz don't spam

Answer»

ANSWER:The hybridization of S" ROLE="presentation" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; line-height: normal; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 15px; vertical-align: baseline; display: inline; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: 0px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(12, 13, 14); orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; position: relative;">SS in SO2" role="presentation" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; line-height: normal; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 15px; vertical-align: baseline; display: inline; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: 0px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(12, 13, 14); orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; position: relative;">SO2SO2 is sp2 which means it has only one unhybridized p orbital to form a π" role="presentation" style="box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; line-height: normal; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 15px; vertical-align: baseline; display: inline; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: 0px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(12, 13, 14); orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; position: relative;">ππ bond

Explanation:

635.

In VII A group, the atomic numbe of first element is ‘x’, then what is the atomic number of third member of element in that group

Answer»

Answer:

the answer is x + 3

Explanation:

it is easy FIRST is x SECOND is x+2 THIRD is x+3

please MARK as the BRAINLIEST answer.

636.

डिस्क्राइब तीन पीरियड चेंजेज इन नेचर ​

Answer»

ANSWER:

SUBJECT KONSA hai yeah toh bta do bahi

637.

Define the components of colloid

Answer»

ANSWER:

The components of a colloidal SOLUTION are the dispersed phase and the dispersion medium. The solute-like component or the dispersed PARTICLES in a COLLOID form the dispersed phase, and the component in which the dispersed phase is suspended is known as the DISPERSING medium.

Explanation:

638.

How to find protons, nuetrons, electrons ​

Answer»

Answer:

The number of PROTONS in the nucleus of the ATOM is equal to the atomic number (Z). The number of electrons in a NEUTRAL atom is equal to the number of protons. The MASS number of the atom (M) is equal to the SUM of the number of protons and neutrons in the nucleus.

639.

6. Describe the kinds of energy changes thataccompany physical and chemical changeswith an example each.Long answers​

Answer»

ANSWER:

CHEMICAL CHANGE cannot be REVERSED PHYSICAL change can be reversed

640.

5. Differentiate between what happens whenyou (i) heat iodine crystals and (ii) stronglyLong answers​

Answer»

ANSWER:

MARK me as BRAINIEST please

Explanation:

FOLLOW me GUYS

641.

Is burning of a candle both physical and chemical change???? ​

Answer»

Yes BURING of candle is both physical and chemical change.

EXPLANATION:-

Wax of the candle is made of carbon and HYDROGEN which reacts with oxygen on burning and CHANGES into carbon DIOXIDE gas and water which escapes into the air. This is a chemical change. As a result, candle melts and REDUCES in size. This is a physical change.

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642.

3.Classify the following as physical or chemical properties  (a) The composition of a sample of steel is: 98% iron, 1.5% carbon and 0.5% other elements.  (b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.  (c) Metallic sodium is soft enough to be cut with a knife.  (d) Most metal oxides form alkalis on interacting with water.​

Answer»

Answer:

(a) It is a PHYSICAL property as no new COMPOUND is formed because steel is an alloy and alloy is a

homogeneous mixture of two or more metals or of metallic ELEMENTS with non-metallic elements.

(b) It is chemical property because chemical reaction takes place between zinc and hydrochloric acid

with the evolution of hydrogen gas and a compound zinc chloride is formed.

Zn(s) + 2HCI (dil) → ZnCI2(AQ) + H2(g)

(c) It is physical property because cutting with knife does not form new substance.

(d) It is chemical property as new compound is being formed by the reaction of metal oxide and WATER.

M2O (s) + H2O (Z) → 2MOH (aq)

Metal oxide Water Metal hydroxid

643.

1. Long-answer questions 1. Describe three periodic changes you observein nature.​

Answer»

Answer:

Periodic changes are changes which occur periodically or at regular intervals Example: Change of seasons. Day and night, changing phases of the moon, BEATING of HEART, clock STRIKING an hour are all examples of periodic motion WHEREAS waterbecoming ice, burning of matchstick etc are non periodic changes.

644.

What is the main difference between alchemy & chemistry​

Answer»

\huge\pink{\underline{Good-Morning}}\huge\blue{\fbox{\fbox{\fbox{\red{\mathcal{Hlo}}}}}}plz \: thx \: my \: answerThe DIFFERENCE between alchemy and modernchemistry is alchemy is based on a mystic, supernatural view of reality, whereas chemistry assumes reality is basically NATURAL. That makes a hugedifference, and chemistrywould never have gotten very FAR if it had stuck with the old METAPHYSICS

645.

The freezing point of a —————- is the same as the melting point of the coresspoding solid

Answer»

ANSWER:

The freezing point of DRY ICE is the same as the melting point of the corresponding solid.

646.

Which of the following material as ups and downs on their surface give the ans faster​

Answer»

Explanation:

A superhydrophobic coating is a thin surface layer that repels WATER. It is made from superhydrophobic (ultrahydrophobicity) materials. Droplets HITTING this kind of coating can fully rebound. Generally SPEAKING, superhydrophobic COATINGS are made from composite materials where one component provides the ROUGHNESS and the other provides low surface energy.

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647.

if the ratio of kinetic energy of Alpha particle and proton is 1:4 then ratio of this wavelength will be​

Answer»

Given :

➾ Ratio of KINETIC ENERGY of ALPHA particle and proton = 1 : 4

To Find :

➛ Ratio of their wave lengths.

Solution :

➳ Relation b/w de - broglie wavelength and kinetic energy of moving particle is given by

\bigstar\:\underline{\boxed{\tt{\lambda=\dfrac{<klux>H</klux>}{\sqrt{2m\times KE}}}}}

where,

\lambda denotes wavelength

◕ h denotes plank constant

◕ m denotes mass

◕ KE denotes kinetic energy

We know that,

➝ mass of proton = m

➝ mass of alpha particle = 4m

\longrightarrow\tt\:\dfrac{\lambda_a}{\lambda_p}=\dfrac{\sqrt{2m_p\times (KE)_p}}{\sqrt{2m_a\times (KE)_a}}\\ \\ \longrightarrow\tt\:\dfrac{\lambda_a}{\lambda_p}=\sqrt{\dfrac{m\times 4}{4m\times 1}}\\ \\ \longrightarrow\tt\:\dfrac{\lambda_a}{\lambda_p}=\sqrt{\dfrac{1}{1}}\\ \\ \longrightarrow\underline{\boxed{\bf{\lambda_a:\lambda_p=1:1}}}

648.

What is the chemical name for Mn3(NO3)3​

Answer»

Answer:

manganese nitrate

Explanation:

I hope it will HELP u plz mark my answer as BRAINLIEST be BRAINLY

649.

Q10. Which utility software 1 pointincreases disk capacity bycompressing files before savingthem on the hard disk? *O a) BackupO b) Operating system​

Answer»

ANSWER:

a) BACKUP is the answer

HOPE it HELPS you

650.

3) Napthalene balls were kept inside the cloth.a) State your observation after a few daysb) What has happened to it?​

Answer»

ANSWER:

Naphtalene BALLS are vapourised

Explanation:

As They are VOLATILE SOLIDS