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tinture IODINE, baking SODA, washing soda, baking powder, vinegar, brass, BRONZE, diamond, glycerine, gypsum, alcohol.etc are the CHEMICALS which are mainly found in our home
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S-block. The s-block is on the left side of the periodic table and includes elementsfrom the first two COLUMNS, the alkali METALS (group 1) and alkaline EARTH metals (group 2), plus hydrogen and helium. ... S-block elements are unified by the fact that their valence electrons (outermost electrons) are in the s orbital.

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Crystallisation is BETTER than evaporation because during Evaporation.

⇒• Some solids decompose or some, like sugar MAY get charred on heating to dryness.

⇒• Some IMPURITIES may remain DISSOLVED in the solution even after filtration which on evaporation contaminates the solid.

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Because the substance is sour in taste
is
called base
and also those ITEM in not kept in METAL CONTAINER so they finally REACT with each other and MAKE a harmful for us

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The acidic behaviour of ACID is due to the presence of HYDROGEN ions. Theacids will not SHOW its acidic behaviour in the absence of water, thisis because the ACIDS produce hydrogen ions only in the presence of water.

CH4+ 2O2 = CO2+ 2H2O. so 1 mole of methane upon complete combustion PRODUCES 2 moles of water. 16 gms of methane produces 36 gms of water. hence 8 gms of methane produces 18 gms of water.

Because it SHOWS its ACIDIC PROPERTY only in WET FORM

Once upon a time there was a child he always lie
one day he LIKED to his PARENTS and GET PUNISHED

Interestingly, aqueous SOLUTIONS with ions conduct electricity to some degree. Pure water, having a very low concentration of ions, cannot conduct electricity. When a solute dissociates in water to FORM ions, it is called an ELECTROLYTE, due to the solution being a good ELECTRICAL conductor.
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✔Aromatic amines cannot be prepared by Gabriel Phthalimide synthesis reaction because aryl halides do not undergo nucleophilic SUBSTITUTION with the ANION formed by phthalimide.

✔It is USED for the preparation of primary aliphatic amines.

✔Phthalimide on treatment with ethanolic POTASSIUM hydroxide forms potassium salt of phthalimide which on heating with alkyl halide followed by ALKALINE hydrolysis produces the corresponding primary amine.

They have displacable H+ IONS

The water level remains the same when the ice cube melts. A floating object displaces an amount of water equal to its own WEIGHT. Since water EXPANDS when it freezes, one OUNCE of frozen water has a larger volume than one ounce of liquid water.

The ACID is hydrochloric acid, not hydroelectric acid.
The REACTION is GIVEN above.
The gas formed is carbon dioxide.

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1) Water has a definite composition that is two atoms of hydrogen and ONE atom of Oxygen.

2) It cannot be separated into its constituents by physical method

3) Hydrogen and oxygen are the gases that combine to FORM water which is liquid.

4) Here, the PROPERTIES of gases to be in its own form at the room temperature DRASTICALLY CHANGES this is one of the way that in which water is proved to be a compound .




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It is the BRANCH of CHEMISTRY that DEALS with the ORGANIC COMPOUNDS

When you DISSOLVE polystyrene in TOLUENE and PRECIPITATE the polymer solution into METHANOL, you get a polymer that is stuck together. However, when polystyrene is dissolved in THF and PRECIPITATED in methanol, the polymer precipitates out in strands.

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The COMPOUND is GLUCOSE (C6H12O6) or Benzene ( C6H6).




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When acid reacts wit metal then the gas liberated is hydrogen(H).For test of PRESENCE of gas you can bring candle NEAR it and you'lol LISTEN a POP sound.
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RED PHOSPHORUS is more STABLE...

Molaiti=1000*5.3/74*200
=0.358

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-: HEISENBERG'S UNCERTAINITY PRINCIPLE :-

It is not POSSIBLE to measure simultaneously the position and the momentum of microscopic particle with accuracy.

∆ x × ∆ P ≥ h/4π

where, ∆x = uncertainty in MEASURING exact position. ∆P = uncertainty in measuring momentum .




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Electromagnetic Spectrum :-

The arrangement of DIFFERENT electromagnetic radiation in ORDER of INCREASING wavelength and decreasing frequency is known as electromagnetic spectrum.



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The pinacol rearrangement EXAMPLES..

➡️ When Pinacol is treated with dilute moderately con H2 so4.. A rearrangement reaction TAKES PLACE which leads to the FORMATION of Me3.C.co3.Me (pinacolone).

You can calculate the H+ concentration by taking 10^(-PH), you now have the concentration of H+ in .001 L, DILUTING it to 2 L will USE the equation M1V1=M2V2, 10^-5 *.001 is 10^-8, 10^-8 /2 = 5*10^-7, to get pH from this, you do -log([H+]), which is -log(5*10^-7), which gives a pH of 6.3.

2.34/14= N = 0.167
5.34/16 = O = 0.333

divide MOLES by least amount of moles

N = 0.167/.167 = 1
O = 0.333/.167 = 2

this WAY it can be found by emperical formula.

formula will be NO2

I THINK that be is having LARGER RADIUS

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An alpha PARTICLE is an doubly charged helium ION which has two electrons removed from its VALENCE SHELL.

Molr mass of COMPOUND is= 368.35 g/mol.
1 mole Potassium ferrocyanide = 12 x 6 grams of C
0.5 moles = 12 x 3 = 36 GM of c

When ACIDIC solution is diluted, it's acidic COMPOSITION is decreased, so pH VALUE increase

As glass is supercooled LET liquid ,so it has TENDENCY to FLOW though very very slow.
So if we see ancient GLASSES,they LOOK thicker from bottom as glass flowed down and look less transparent and more milky

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this is so as when we blow AIR into the balloon FIRST the MOLECULES are free to move but when we blow excess of air in it molecules starts pushing each other on the sides of balloon as a RESULT it can HOLD more of pressure so it inflates

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This happens due to CREATION of F-centers, as a result of CHLORIDE anion vacancy created UPON heating KCl in excess of K vapours. The hole created by the chloride anion is filled by an electron from K, GIVING it VIOLET appearance.

5 ML of OXYGEN will LEFT after REACTION

THIS IS RELATED TO THE DENSITY OF SUBSTANCE , THE DENSITY OF WATER IS MORE THAN OIL AND WATER FORM UPPER LAYER & OIL IS IN LOWER .

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Because when the MIXTURE is passed through a magnetic belt the iron filling GET attaract to MAGNET and fall near the belt but the SAND is not magnetic attractive it falls away from the belt and both get separated EASILY.

HALOGENS have SEVEN VALENCE ELECTRONS.

In ALKALI metal no of valence ELECTRONE is 1 so its valency is ALSO 1
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