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The SEPARATION of Alumina from impurities in the bauxite Ore is USUALLY ACCOMPLISHED by the bear process. In this process the ground bauxite is least with CAUSTIC soda to produce SOLUBLE sodium aluminate living the impurities in the insoluble Residue. The eliminate solution is mainly composed producing Al(OH)3 which is confined to produce Al2O3

It is the smallest PARTICLE in the element
it is SMALLER than microorganisms also
so this is the REASON the atom is not visible with naked EYES

1 ATOMIC mass is PRESENT in 18gm of WATER

I GOT only this RI8 now...U UNDERSTAND why

Hey mate here's ur ans

LET A = { x : x is a LETTER in the WORD INORGANIC}

A = { I,N,O,R,G,A,C}

A= {O,R,G,A,N,I,C}

let B = { x : x is a letter in the word ORGANIC}

B = { O,R,G,A,N,I,C }

Here we can see that both the sets have equal no. of elements.

so, { O,R,G,A,N,I,C } is subset of both the sets.

The answer is C. Alkaline copper sulfate SOLUTION.

Proteins are composed of PEPTIDE bonds (in their primary structure).

When copper sulfate in alkaline condition reacts with the peptide bond of proteins, it produces a purple color CHANGE.

The test USED for detecting proteins is called the Biuret test.

Primarily, when conducting the Biuret test, the protein solution is HEATED to allow the peptide bonds to be exposed.

Metamerism (BIOLOGY), in zoology and developmental biology, the PROPERTY of having repeated segments, as in annelids.

and if u are looking for something in colorimetry........

Metamerism (color), in colorimetry, a perceived matching of the colors that, based on differences in SPECTRAL POWER distribution, do not actually MATCH

Actually O₂ is OXYGEN but while BALANCING any reaction as per REQUIREMENT 3O₂ can be written.

3O₂ is also oxygen with 3 mol

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Gaylussacs law state that at constant VOLUME, PRESSURE of a fixed AMOUNT of a gas varies directly with pressure
P/T=Rn

I THINK s+co2 REACTION SULPHUR +CARBON DIOXIDE

The answer to your question is D. more frequently, causing the reaction rate to increase.

Increasing the concentration of reactants in a CHEMICAL reaction will mean that there will more atoms or MOLECULES to collide and react with each other. Given a fixed space (solvent), increasing the reactants will mean greater CHANCES of these atoms or molecules to collide with each other.

With more COLLISIONS (frequent reactions), then reaction rate increases. A reaction occurs, in this CASE a chemical reaction, when the reactants collide.

The soap molecule is generally represented as RCOONa. In solution, it IONIZES to form RCOO- and Na+. Each soap molecule has a POLAR head group (carboxylate ion, COO- group) and a LONG non-polar hydrocarbon tail (R group from long chain fatty acid). The polar head attracts the polar water molecule and is called hydrophilic end and the non-polar tail attracts the water insoluble oily or greasy dirt particles.

When a dirty cloth is placed in soap solution, the long non-polar hydrocarbon tail of soap molecules points towards the oily dirt particles and the polar heads point towards the water. This forms a spherical structure with polar parts of the molecule on the SURFACE and non-polar parts in the center. This spherical structure is called micelle. This micelle is attracted towards water and carries the oily dirt particles along with it. This causes the dirt particles to detach from the fibres of the cloth. In this manner, clothes become FREE from dirt or dust.

#when you drop a piece of sodium into ethanol then sodium ETHOXIDE with hydrogen GAS is FORMED.

#Gas EVOLVED is hydrogen

#Na + C2H5OH -----> C2H5ONa + H2

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◆Nickel has VARIABLE valency as it belongs to D-Block of the modern periodic table.

◆Valency of Nickel is +1 , + 2 , +3 and +4
But generally in the questions we use +2 valency of Nickel because, valency of an element depends upon the HIGHEST ENERGY LEVEL of 's' and 'p' shell.

◆ For nickel it would be 4s2 so resulting +2 valency by giving both the s-electrons away.



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Amount of WATER CONTENT in HUMAN body is 70%

Alpha PARTICLE is a DOUBLY charged Helium ion.

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WHAT IS RECTILINEAR PROPAGATION OF LIGHT?


IT IS THE PROPERTY OF LIGHT WHICH STATES THAT LIGHT GOES IN A STRAIGHT DIRECTION.



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The thermodynamic entropy therefore has the dimension of energy divided by temperature, and the unit joule per KELVIN (J/K) in the International System of Units (SI).

Thermodynamic entropy is an EXTENSIVE property, meaning that it scales with the SIZE or extent of a system.

The movement of solvent MOLECULES from the region of its higher concentration to the region of its lower concentration through the semipermeable MEMBRANE is called osmosis.

diffusion is the movement of any substance from the region of its higher concentration to the region of its lower concentration

hope you GOT that

Molecular mass is the SUM of ATOMIC masses in the molecule. Molar mass is the mass of one mole of the molecule. This turns out to be numerically the same as the molecular mass but the units are grams/mole!Relative molecular mass is the sum of the atomic masses of the atoms in the molecule. Relative FORMULA mass is the sum of the atomic masses of the atoms in the empirical formula(Atomic subscripts reduced to their lowest terms). ... Formular mass APPLIES to ionic compounds.

ANSWER:

Eq. wt of METAL = 78/2​=39

Explanation:

Let the GIVEN metal chloride and sulphate are MCl2​ and MSO4​and mass of metal M = x g

Then, according to question

0.298/x+71​=0.348​/x+96

0.348x+24.708=0.298x+28.608

0.348x−0.298x=28.608−24.708

0.05x=3.9

x=3.9/0.05​=78

Eq. wt of metal =78/2​=39

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Fossil FUELS are not a clean source of energy EITHER. CONSERVATION of ELECTRICAL energy can help to lessen pollution and reduce greenhouse gas emissions. ... Decreasing our demand for electricity can decrease the need for nuclear reactors and therefore reduce the risk of radioactive pollution.

Hydrogen is in ABUNDANCE around the SUN because sun has sufficient gravity to retain hydrogen but earth being much small and it has no gravity around it .so, it cannot hold the AIR or hydrogen . That is why hydrogen doesn't abundance around the earth .

I HOPE it will help you ^_^

ANSWER: The correct answer is OPTION (2).

Explanation:

Given reaction;

...(1)

On the reversing the reaction:

..(2)

Then heat CHANGE during reaction of metal X with one mole of to form oxide to maximum extent.

Multiply the above the reaction (2) with '4'.

So, the heat change during of the reaction =

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Granite is used for making long lasting building & STATUES because it resists weathering & ABRASION & it bears significant WEIGHT & can be polished to a shine.

Granite is an IGNEOUS rock with a variegated texture but no overall crystalline structure.

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Determination of pKa by pH Titration
Method
Objective
To determine the pKa values and buffering capacity of buffer solutions.
Requirements
Buffer stock solution (concentrated), pH meter, distilled water, wash bottle, volumetric flasks, measuring
cylinders, beakers, and pipettes.
Glycine-NaOH buffer system:
1. 20 mM glycine
2. 200 mM NaOH
Glycine-HCl buffer system
1. 20 mM glycine
2. 200 mM HCl
Theory
The OBSERVATION that partially neutralized solutions of weak acids or weak bases are resistant to pH changes
on addition of small amounts of strong acid or strong base leads to the concept of ”buffering”. Buffers
consist of an acid and its conjugate base, such as carbonate and bicarbonate, or acetate and acetic acid. The
quality of a buffer is DEPENDENT on its buffering capacity (resistance to change in pH by addition of strong
acid or base) and ability to maintain a stable pH upon dilution or addition of neutral salts. Because of the
following EQUILIBRIA, addition of small amounts of strong acid and strong base result in removal of only small
amounts of the weakly acidic or basic species, there fore there is little change in the pH:
HA(acid) ↔ H
+ + A
−
(conjugate base)
B (base) + H
+ ↔ BH+
(conjugate acid)
BL 302-1The pH of a solution of a weak acid or base may be calculated from the Henderson-Hasselbalch equation:
pH = pKa + log [basic species]
[acidic species]
(1)
The pKa of a buffer is that pH where the concentrations of basic and acidic species are equal, and this
basic form of equation is accurate between the pH ranges of 3 to 11. Below pH 3 and above pH 11 the
concentration of the ionic species of water must be included in the equation. Since the pH range of interest
to the biochemical engineer is 3 - 11 ranges, this can be ignored. From the Henderson-Hasselbalch equation
an expression for buffer capacity (β = d[A
−
]/d[pH]) may be deduced.
Procedure
1. pH Measurement: Mix all solutions thoroughly. The pH measurement may be made in original
beakers. Do not change any control on the pH meter except as directed. With the meter on stand by,
rinse the electrode with deionized water, gently shake off the excess water, and immerse the electrode
in the sample solution. Switch the meter to the pH mode, allow the reading to stabilize, and record
the pH. Switch the meter back to the standby mode, rinse the electrode again, and leave the electrode
immersed in deionized water. Repeat this procedure for all samples.
2. Glycine-NaOH buffer system: Prepare 50 ml 20 mM glycine solution and 100 ml of 200mM NaOH
solution. Calibrate the pH meter with standard buffer solution at room temperature. Take 50 ml of
glycine solution in a beaker and add 0.5 ml of NaOH solution and shake well to mix. Note the change
in pH. Add subsequent quantities of NaOH with an increment of 0.5 ml each time and note observed
pH at regular intervals. Take about 30-35 readings and generate the following observation table:
Volume of NaOH added (ml) Observed pH
0.0
1.0
1.5
2.0
2.5
.


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Theoretical MOLECULAR weight
it represents molecular weight of substance which is taken from dissociation and Association. it is ALSO considered as normal molecular weight are calculated molecular weight

observed molecular weight
it represents the molecular weight of EQUILIBRIUM mixture. It is also considered as abnormal molecular weight for experimental molecular weight of AVERAGE molecular weight

An ATOM's electron configuration is a numeric representation of its electron orbitals. Electron orbitals are differently-shaped regions around an atom's nucleus where electrons are mathematically likely to be located. An electron configuration can quickly and simply tell a READER how many electron orbitals an atom has as well as the number of electrons POPULATING each of its orbitals. Once you UNDERSTAND the basic principles behind electron configuration, you will be able to write your own configurations and TACKLE those chemistry tests with confidence.

6.022 ×10^23 is the AVOGADRO NUMBER for 1 MOLE

Because of the prsence of acid in them and acid have corrosive NATURE because of which the acid present in LEMON and trement is used for cleaning the copper pots or vessels actually the acid tarnishes the first BLACK layer of the copper pot



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The three ALKALI metals are potassium (K), rubidium (RB) and caesium (Cs) which form SUPEROXIDE when HEATED in EXCESS air.

ANSWER:--

◆ DECOMPOSITION REACTION:- The reaction in which a single substance decomposes to GIVE two or more substances is called Decomposition Reaction.

◆ There are three types of decomposition reaction

● Thermal Decomposition
● Electrolytic Decomposition
● Sunlight Decomposition

1. Thermal Decomposition:- When the decomposition reaction carried by heat is called thermal decomposition.

example = 2FeSO4 ---- Fe2O3 + SO2 + SO3

2. Electrolytic Decomposition:- When the decomposition reaction carried by electricity is called electrolytic decomposition.

Example = H2 --- 2H2 + O2

3. Sunlight Decomposition:- When the decomposition reaction carried by sunlight is called sunlight decomposition.

Example = 2Ag Br ---- 2Ag + Br2


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ANSWER:--

◆NA2 + H2O ---- NaOH

◆Balanced CHEMICAL Equation
Na2 H2O ---- 2NaOH

◆Word Chemical Equation
SODIUM Oxide + Water ---- Sodium Hydroxide


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ANSWER:--

Homologous Series:-

◆ It is Series of compounds in which in the same functional groups substitute for hydrogen in a carbon chain.


◆ For instance, the Alcohols:
CH2OH
C2H5OH
C3H7OH
C4H9OH

◆ The SUCCESSIVE MEMBER differs by one -CH2 UNIT and 14 unit of mass.

◆ The chemical properties are imparted by the functional groups thus all member have similar properties. But the members have different physical properties.

◆ The physical properties vary among the members of Homologous Series due to different in their molecular mass.

◆ Melting point and boiling point will increase with increasing molecular mass.


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