Explore topic-wise InterviewSolutions in Current Affairs.

I THINK the METAL USED in ALUMINIUM

dipole moment =charge X DISTANCE between them

=1.6 x 10^-19 x 141 x 10^-12 Cm

=225.6 x 10^-31 Cm

=22.56 x 10^-30 Cm

now,

% of IONIC characters

=dipole moment by experimental x 100/dipole moment by THEORETICAL

=(2.6 x 10^-30/22.56 x 10^-30 ) x 100

=260/22.56 %

=11.52 %

READ more on Brainly.in - brainly.in/question/1105804#readmore

A relation of the formk = aN(xAxB/d2)¾+bhas been found to hold accurately for a large number of diatomic and simple polyatomic molecules in their ground states. (The average deviation of k calculated from k observed for seventy‐one cases is 1.84 percent.) Here k is the bond‐stretching force constant, d the bond length, N the bond order, and xA and xB are the electronegativities of the bonded atoms. If k is MEASURED in dynes/cm×10−5 and d in Angstrom units, a and b have the VALUES 1.67 and 0.30, respectively, for stable molecules exhibiting their normal covalencies, except those in which both bonded atoms have only one electron in the valence shell; for diatomic molecules of the alkali METALS, NA2, NaK, etc., a and b are 1.180 and −0.013, respectively; for hydrides of elements having a single electron in the valence shell, 1.180 and 0.040, respectively; and for diatomic hydrides of elements having two to four electrons in the valence shell, 1.42 and 0.08, respectively. Numerous applications of the relation are made and CERTAIN exceptions are pointed out.

Types of Metallurgical Processes

1 Pyrometallurgy EXTRACTION of metals takes PLACE at very HIGH temperature. Cu, Fe, Zn, SN, etc .. are extracted by this METHOD.
2 Bydrometallurgical process In this method, metals are extracted by the use of their aqueous solution. Ag and Au are extracted by this method.
3 Electrometallurgical process Na, K, Li, Ca, etc., are extracted from their molten salt solution through electrolytic method.

Cange in colour


form new SUBSTANCE

CHANGE structure and TEMPERATURE ALSO

A rearrangement reaction is a broad class of organic reactions where the CARBON skeleton of a molecule is rearranged to give a STRUCTURAL ISOMER of the original molecule. Often a SUBSTITUENT moves from ONE atom to another atom in the same molecule.

ANSWER:

Explanation:

Molarity=No of moles/Volume of SOLUTION in litre

10% means 10G in 100g solution

So,mass of solvent=100-10=90g

No of moles=10/180=1/18

Molality=(1/18)/(90/1000)

Molarity=(1/18)/1=1/18

Hope you understood.

Hope it helps u.
water glass is a SOLUTION of sodium or potassium silicate which solidifies on EXPOSURE to air, USED for preserving eggs and hardening artificial STONE.
please mark as BRAINLIEST.

Metals such as potassium and SODIUM react so vigorously that they catch fire if KEPT in open.Hence,to PROTECT them and to prevent their burning they are stored in KEROSENE as moisture cannot enter in it.


@skb

Homogeneous mixture

1. It has UNIFORM COMPOSITION

2. The PARTICLES are uniformly distributed

3.Example of Homogeneous mixture: alcohol-WATER mixture we call this homogeneous mixture as a solution, Sugar and water, Air is a homogeneous mixture of gases

Heterogeneous mixture

1. It has a non-uniform composition

2. Particles involved are not uniformly distributed

3.Example of Heterogeneous mixture: sea water, concrete, a mixture of salt water and sand.

@skb

ISOMERISM the relation the relation between two CHEMICAL compounds which are formed of different atoms of the same kind with the same composition which differ only in the orientations.

Two types of isomerism found in coordination compounds are -

-Stereoisomerism - It is the isomerism in which two compounds have the same atoms which are ARRANGED in different positions.

-Structural isomerism - In this type of isomerism, in which there is an exchange of the cationic and anionic part AMONG the isomers.
Eg.
[PtBr(NH3)3]NO2
[Pt(NO2)(NH3)3]Br

The LANTHANIDE contraction is the greater-than-expected decrease in ionic radii of the elements in the lanthanide SERIES from atomic number 57, lanthanum, to 71, lutetium, which results in smaller than otherwise expected ionic radii for the subsequent elements starting with 72, HAFNIUM

FROM ALKYL HALIDES (By Wurtz Reaction)
Alkyl halides are halogen DERIVATIVES of alkanes with general formula R-X. They can be used to prepare alkanes by Wurtz reaction:
It INVOLVES the CHEMICAL reaction between alkyl halides (usually BROMIDES and iodides) and metallic sodium in the presence of dry ether. The product is the symmetrical alkane containing twice the number of carbon atoms present in the alkyl halide.

So, what do you WANT to KNOW???

Hii There!!!

Balance equation is :-
2H₂ + O₂ -------> 2H₂O

Moles in 10g of hydrogen = mass/molar mass
          = 10g / 2
          =  5 moles

64g of OXYGEN

No. of moles = given mass/molar mass

So, moles = 64/32

 = 2 moles

The mole reaction for the equation above is
H₂ : O₂  is 2 :1

THEREFORE 5 moles of H₂ will REQUIRE 2.5 moles of oxygen - this makes oxgen the limiting reagent.

We therefore use the moles of oxygen to find those of H₂O:

mole ratio  O₂ : H₂O   is 1 : 2

That means 2 moles of oxygen will PRODUCE 4 moles of H₂O

Now , If 1 mole = 22.4 liters
Then 4 moles = 22.4 × 4/1
                       = 89.6 liters

The volume of H₂O produced is 89.6 liters.


Hope it helps

Because with INCREASE in temperature, volume of SOLUTION also increases. So with change in temperature, molarity also CHANGES. But there is no EFFECT of temperature on molality. For example, with increase in temperature, volume will increase and then molarity will decreases.

The probability of finding the electrons around the NUCLEUS is known as Orbital. There are 6 NODES in 7s orbital

The component of a SOLUTION that dissolve the other component in it ( USUALLY the component PRESENT in large AMOUNT) is CALLED solvent.

X has 7 ELECTRONS in its outermost shell and it REQUIRES one electron to complete its octet so atom y will DONATE 1 electron . it MEANS their is transfer of electrons between atoms .

so the bond FORMED will be ionic.

and its formula will be xy.

hope it helps you

The METAL REACT with OXYGEN and CARBON DIOXIDE

When COPPER is exposed air it reacts with WATER and oxygen and a green LAYER is formed.
This happen due to oxidation. Common name of the green colored LAYERING is patina or verdigris.
Chemical formula :Cu(CH3COO)2
how to prevent :
1) polish the copper.
2)wash the copper articles with warm water.

Question KYA HAI smaj me nhi AA RHA

ANSWER:

Explanation:

Actinides are RADIOACTIVE SUBSTANCES,hence SOURCE is any radioactive MATERIAL.

MOLE of WATER is 1000/18 =55.55 mole

Mole of SOLUTE is 1/1= 1 mole then

Mole FRICTION of solute = 1/1+55.55 =0.1768 =0.177

Gas is carbon dioxide and compound FORMED is CALCIUM CARBONATE
ca(oh)2+co2=caco3

1) Hot tea gets cool over time DUE to evaporation - hot molecules on the surface gets evaporated taking away heat with them.
2) Wet clothes dry in sun due to evaporation - the WATER in wet clothes takes heat energy from sun and gets evaporated.
3) Evaporation of perspiration from body - Sweat on our body evaporates taking away heat from our body
4) Drying of a mopped floor
5) Drying of wet HAIR after some time
6) drying up of water BODIES like lakes and rivers
7) Evaporation of water from earthen pots
8) Evaporation of water sprinkled on ground or ROOF top
9) Evaporation of nail paint remover when applied on nails - acetone in nail paint remover takes heat from our body and evaporates.
10) Preparation of common salt from sea water by evaporation

Types of Overlapping and NATURE of Covalent Bonds. (ii) s-p overlap. It INVOLVES mutual overlap of half-filled s-orbital of the one ATOM with half-filled p-orbital of the other. ... This type of covalent bond is formed by the lateral or SIDEWISE overlap of the ATOMIC orbitals.

Answer: -

In Dettol, Chloroxylenol is the chief ingredient, comprising 4.8% of Dettol's total MIXTURE, with the REST made up by pine OIL, isopropanol, castor oil, soap and water.

When we add water to the dettol, micro emulsion occurs. It is a SOLUTION where small droplets of the oil gets SUSPENDED in the water.The microemulsion destabilizes releasing the pine oil and castor oil. This leads to turbidity.

Thus a few drops of dettol when added to water the mixture turns turbid

Latitude is an angle which RANGES from 0° at the Equator to 90° at the POLES. Lines of constant latitude, or PARALLELS, run east–west as circles parallel to the equator. 

pls follow me

Here is the ANSWER to your QUESTION

Electron
plzz MARK me BRAINLIEST

The SHINY brown COLORED element x is copper. When copper metal is heated in air, it forms a black colour compound copper oxide. So,
the black COLOURED compound is copper oxide (CuO).
2Cu+O2-----heat-----2CuO
when it REACTS with HCl it gives
CuO+2HCl--------CUCL2+ H2O
therefore z is CuCl2

Lyophilic sols and LYOPHOBIC sols DEPENDS upon the INTERACTION of colloids and the loquid

Soorrryyyy i HV no IDEA ABT it !! m in TENTH THOUGH

Two names of METALLOIDS are POLONIUM (PO) and TELLURIUM (Te)

The COMPOUND A is ( 3 ) OPTION which I THINK .

ANSWER:

-1.51ev

Explanation:

Energy=-13.6Z^2/n^2

so,E=-13.6*1/3^2

= -13.6/9

=-1.51ev.