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Aluminium reacts VIGOROUSLY with NITRIC acid once the Al2O3 layer has been breached. (HOWEVER, as Kraput pointed out, if the HNO3 is very strong, it will form a passive layer) the reaction is just like magnesium with nitric acid, except that it takes a few minutes to get started. it produces aluminium nitrate and HYDROGEN gas and a lot of heat, as well as NITROGEN oxides fumes.

the reaction formula is:

aluminium + nitric acid —> aluminium nitrate + hydrogen
2Al(s) + 6HNO3 (aq) —> 2Al(NO3)3 (aq) + 3H2(g)

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↪↪Sodium kept in KEROSENE oil BCOZ it is highly reactive, it can react with AIR and PRODUCE fire.

hope it helps u☺

Products of fractional distillation include, petrol (or gasoline), naptha, kerosene, diesel OIL, lubricating oil, FUEL oil, GREASE and wax, and some residue. 


The BASIC idea is to heat the crude oil and then separate out thevarious FRACTIONS in a fractional distillation column.

The SINGLE most important operation used for the recovery and UPGRADING of sulphide ore. Only sulphide ORES are concentrated by froth flotation process because pine oil selectively wets the sulphide ore and hence BRINGS it to the froth

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Nucleophilic acyl substitution describe aclass of substitution REACTIONS involvingnucleophiles and acyl compounds. In this type of reaction, a nucleophile – such as ANALCOHOL, amine, or enolate – displaces theleaving group of an acyl derivative – such asan ACID halide, ANHYDRIDE, or ESTER.

Electrons are shared between the atoms which can neither release electrons nor ACCEPT. more ever atoms should have low ELECTRONEGATIVITY difference.
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17% SULPHUR 26% STARCH 40% AMMONIA

A volume occupied by 4.4g of CO2 at STP is. (a) 22.4L. (B) 2.24L. (c) 0.224L.

1)2,8,3

2)13

3)13

4)3-

5)aluminium

6)METAL

A molecular vibration occurs when atoms in a molecule are in periodic motion while the molecule as a whole has constant translational and rotational motion. The frequency of the periodic motion is known as a vibration frequency, and the typical frequencies of molecular vibrations range from less than 1013 to approximately 1014 Hz, corresponding to wavenumbers of approximately 300 to 3000 cm−1.

In general, a non-LINEAR molecule with N atoms has 3N – 6 normal modes of vibration, but a linear molecule has 3N – 5 such modes, because rotation about its molecular axis cannot be observed.[1] A diatomic moleculehas one normal mode of vibration. The normal modes of vibration of polyatomic molecules are independent of each other but each normal mode will involve simultaneous vibrations of different parts of the molecule such as different chemical bonds.

A molecular vibration is excited when the molecule absorbs a quantum of energy, E, corresponding to the vibration's frequency, ν, according to the RELATION E = hν (where h is Planck's constant). A fundamental vibration is excited when one such quantum of energy is absorbed by the molecule in its ground state. When two quanta are absorbed the first OVERTONE is excited, and so on to higher overtones.

To a first approximation, the motion in a normal vibration can be described as a kind of simple harmonic motion. In this approximation, the vibrational energy is a quadratic function (parabola) with respect to the atomic displacements and the first overtone has twice the frequency of the fundamental. In reality, vibrations are anharmonic and the first overtone has a frequency that is slightly lower than twice that of the fundamental. Excitation of the higher overtones INVOLVES progressively less and less additional energy and eventually leads to dissociation of the molecule, because the potential energy of the molecule is more like a Morse potential or more accurately, a Morse/Long-range potential.

The vibrational states of a molecule can be probed in a VARIETY of ways. The most direct way is through infrared spectroscopy, as vibrational transitions typically require an amount of energy that corresponds to the infrared region of the spectrum. Raman spectroscopy, which typically uses visible light, can also be used to measure vibration frequencies directly. The two techniques are complementary and comparison between the two can provide useful structural information such as in the case of the rule of mutual exclusion for centrosymmetric molecules.

Vibrational excitation can occur in conjunction with electronic excitation in the ultraviolet-visible region. The combined excitation is known as a vibronic transition, giving vibrational fine structure to electronic transitions, particularly for molecules in the gas state.

Simultaneous excitation of a vibration and rotations gives rise to vibration-rotation....

PV=nRTPV=nRT
Where PP is the pressure of the gas, VV is the volume taken up by the gas, TT is the temperature of the gas, RR is the gas CONSTANT, and nn is the NUMBER of moles of the gas.

A catalyst is a SUBSTANCE that can be ADDED to a reaction to increase the reaction rate without getting consumed in the process. CATALYSTS typically speed up a reaction by reducing the ACTIVATION energy or changing the reaction mechanism. Enzymes are proteins that act as catalysts in biochemical reactions.

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In CELL FRACTIONATION TECHNIQUE is a PART of cell

Very TUF QUESTION V

   Prepare 800 ML of distilled water in a SUITABLE container.

   Add 5.772 g of SODIUM Acetate to the solution.

   Add 1.778 g of Acetic Acid to the solution.

   Adjust solution to desired pH using 10N HCl (TYPICALLY pH ≈ 5.0).

   Add distilled water until volume is 1 L.

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no. of ATOMS in 4 G of CALCIUM= 6.023*10^22

no.of maloe=4/40=1/10

no of moles of neon required=x/20=2/20

therefore, 2g of neon will have the same no. of atoms

Hola,

x:35=14:245
x/35=14/245
now,we will USE the cross MULTIPLICATION method.

so,
x/35=14/245
x*245=14*35
245x=490
x=490/245
x=2/1
x=2.

hence,
the value of x is 2.
if any QUERY please ask.

thanks for ASKING this question.
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atoms combine with other atoms to FORM molecules, they interact to do so and create a chemical bond. A chemical bond is an ATTRACTIVE FORCE that links two atoms together in a molecule

there are many kinds of bonds, such as the covalent bonds, the STRONG bonds created from the sharing of electrons

Due to the PRESENCE of COPPER we SEE GREEN flames.

This MAKES it the most common GREENHOUSE gas. In dry air, the THIRD most abundant gas is ARGON, amonatomic noble gas. The abundance of carbon dioxide is variable. While it is an important greenhouse gas, it is only present an AVERAGE of 0.04 percent, by mass.

HARDNESS and crystal structure

toughness

brightness and the GLINT in colors

luster

fluorescence

thermal conductivity

thermal stability

good electric insulator

pressure resistance

high MELTING POINT

C-H OR C-C


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Both burn LEAVING carbon rsidue 12C ISOTOPE and no 13C

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The term bond energy normally refers to the strength of the covalent bond between two atoms. I would take the question to refer to the homolytic bond dissociation energy to cleave the bond giving two RADICALS. This is invariably a positive value since bond BREAKING costs energy and bond FORMATION gives out energy. Where the two atoms are different and THEREFORE have different values of electronegativity there will be an ionic component to that bond strength but the covalent component is a function of the bond order and the efficiency of the ATOMIC orbitals overlapping to form the bonding molecular orbitals. In contrast, the term lattice energy normally refers to electrostatic (coulombic) interactions between cations and anions in an ionic lattice. Again, formation of an ionic lattice is a favourable process and breaking that lattice will cost energy.

Its ans
0.01 N
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The BUCKET at LAST.......MAYBE

In SN1 we PREFENCE 3°then 2° then. 1°
in SN2 we prefence 1° then2° then3°

The ans is
años i VIVE u trick to find CHEMICAL FORMULA

It will be 800 DEGREES

The TEMPERATURE is CONSTANT

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They are hard because of strong electrostatic FORCES between atoms. They are brittle because of low mobility of defects called DISLOCATIONS present in IONIC solids


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ANSWER---

◆ An atoms or group of ATOM which are reactive sits in a organic COMPOUNDS. They provide specific PROPERTIES to the organic compounds.

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To KNOW their PROPERTIES

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The Solvay PROCESS is extensively used for industrial PREPARATION of sodium CARBONATE (soda ash). The process is named after Ernest Solvay who developed the process during the 1860s. Carbon dioxide reacts with the dissolved ammonia to form AMMONIUM carbonate followed by ammonium hydrogen carbonate.


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By REACT with soduim