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्ध्व पातन - sublimationप्रकृति में कुछ पदार्थ ऐसे होते है जिनको यदि गर्म किया जाता है तो वे ठोस अवस्था से सीधे ही वाष्प अवस्था में बदल जाते है , पदार्थ का ठोस अवस्था से सीधे वाष्प अवस्था में बदलने की क्रिया को ही उर्ध्वपातन कहते है और उन उस पदार्थ को जो उर्ध्वपातन का गुण .नोट - गूगल से कॉपी किया गयास्रोत - गूगल| ￣￣￣￣￣￣￣￣￣￣LI धन्यवाद अगर आपको मेरा lI जवाब पसंद आया हो या lI   इसे   BRAINLIEST lI  दिया गया हो L l|＿＿＿＿＿＿＿＿ ＿＿l(\__/) ||  ll (\__/)(•ㅅ•) ||  ll (•ㅅ•)/ 　 づ  ⊂ \ {उद्देश्य -70 अनुयायियों और 1500 धन्यवाद}

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tion:When added to ice, salt first dissolves in the film of liquid water that is always PRESENT on the SURFACE, THEREBY lowering its FREEZING point below the ices temperature. Ice in contact with salty water therefore melts CREATING more liquid water, which dissolves more salty thereby, causing more ice to melt and so on.

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Answer. Sulfuric acid ( H2SO4 ), NITRIC acid ( HNO3 ), and CARBONIC acid ( H2CO3 ) are the major components of acid RAIN

to SEE lightammeterExplanation:HOPE it HELPS you FRIEND

-1 is the correct ANSWER which is OPTION B)EXPLANATION:MARK as brainliest

Simple cooking OFTEN involves stovetop searing of FISH or meat and sautéing of VEGETABLES. A GOOD pan, preheated until really hot, delivers the intense flavors you're looking for.

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The COMPOUND hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At ROOM TEMPERATURE, it is a COLOURLESS gas, which FORMS white fumes of hydrochloric acid upon contact with atmospheric water vapor.

a&d....both.........

1) Chromatography 2)Petroleum3)DISTILLATION 4)MAGNETIC Separation PLEASE mark me as BRAINLIEST and follow me. ......☺☺

1. NITROGEN and PHOSPHORUS2. HydrocarbonExplanation:HOPE it HELPS you BUDDY :)

The mixture contains two or more substances mixed, but neither chemically as well as not in INEXACT quantity while COMPOUND includes two or more elements combined chemically and in a fixed ratio. Pure substances are MADE up of elements and compounds

In this way... please MARK As BrainliestExplanation:Chemical SYMBOL, short notation derived from the scientific NAME of a chemical element—e.g., S for sulfur and Si for silicon. Sometimes the symbol is derived from the Latin name—e.g., Au for aurum, GOLD, and Na for natrium, sodium.

please MARK As BRAINLIEST...Explanation:1 Answer. (a) Camphor, iodine, naphthalene, ammonium CHLORIDE, DRY ice (solid carbon DIOXIDE), etc. (b) Gases do not change their state on heating.

No . EXPLANATION:it us wrong a precipitate GENERALLY KNOW INSOLUBLE substance

We call SUBSTANCES that dissolve in water soluble. SUGAR and salt are examples of soluble substances. Substances that do not dissolve in water are called insoluble. Sand and flour are examples of insoluble substances.Explanation:HOPE this HELPS.

I THINK SHOLEY .EXPLANATION:HOPE I HELP you

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Reaction of IRON Nails with Copper SULPHATE Solution in Water. When an iron nail is DIPPED in copper sulphate solution, a BROWN coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.Explanation:I hope this is the answer..please MARK my answer as brainlist...if it is wrong I am sorry..Thanks...

When iron NAILS are PLACED in copper SULPHATE SOLUTION the iron DISPLACE copper from its salt solution as it is more reactive tha copper.

tion:2nd QUESTION is WRONG. So I didn't do that. There is no THING LIKE NA2O

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tion:(a) Aluminium FOILS are used to wrap food items. ... (a) Aluminium is malleable, soft and does not react with food items, so it is used to wrap food items. (b) METALS are GOOD conductor of HEAT and electricity, so immersion rods are made up of metallic substances......FOLLOW me and like my answers i will do same for u

tion:Classification of elements in GROUPS PROVIDES as a fixed PATTERN in which the element change their properties periodically. Periodic table made the study of physical and CHEMICAL properties of element simple and organized.

Both A and B

Smell of a PERFUME REACHES US by the process of diffusion.

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Chemical formula of the FOLLOWING is as follows:(a) Magnesium chloride = MGCL 2 (b) Calcium oxide = CaO(c) Copper NITRATE = CU(NO 3 ) 2 (d) Aluminium chloride = AlCl 3 (e) Calcium carbonate = CaCO 3

tion:(ii) Hydrochloric acid reacts with copper sulphide to FORM copper CHLORIDE liberating H2S gas which has the smell of rotten egg. (iii) When excess of chlorine gas is TREATED with ammonia gas, a YELLOW coloured explosive is formed.

1) H2O2)RUST takes place when IRON COMES in CONTACT with air and water..Explanation:plz mark brainliest

cottonExplanation:because it is LIGHT

⠀ ⠀The force acting PER unit area on the walls of the container is called pressure. Thus, gases EXERT pressure. ... (d) In AIR, there is lot of empty space between the MOLECULES and the FORCES between the particles are almost negligible. Hence, we can move our hand in air.⠀ ⠀ ⠀ ⠀21♥Follow » InboX

s number (SYMBOL A, from the German word Atomgewicht [atomic weight]),[1] also called atomic mass number or nucleon number, is the TOTAL number of protons and neutrons (together known as nucleons) in an atomic nucleus. It is approximately equal to the atomic (also known as isotopic) mass of the atom expressed in atomic mass units. Since protons and neutrons are both baryons, the mass number A is identical with the baryon number B as of the nucleus as of the whole atom or ion. The mass number is different for each different isotope of a chemical element. Hence, the difference between the mass number and the atomic number Z gives the number of neutrons (N) in a GIVEN nucleus: N = A − Z.[2] The mass number is written either after the element name or as a superscript to the left of an element's symbol. For example, the most common isotope of carbon is carbon-12, or 12 C , which has 6 protons and 6 neutrons. The full isotope symbol would also have the atomic number (Z) as a subscript to the left of the element symbol directly below the mass number: 12 6C .[3]Mark Me As Brainliest(:

Lusture is SEEN only on the freshly CUT METAL surface EXPLANATION:please MARK it brainliest answer

(a) ALUMINIUM is the CORRECT ANSWER. HOPE IT'S HELPS YOU: