Explore topic-wise InterviewSolutions in Current Affairs.

Let the MOLECULAR weight of KBrO₃ be 'M'.

Oxidation state of Br in BrO₃⁻ :

x + 3(-2) = -1

x - 6 = -1

x = +5

Oxidation state of Br in Br⁻ :

x = -1

Thus, the oxidation state of Br in the GIVEN reaction, CHANGES from +5 to -1.

→ n-factor = change in oxidation state = 5 - (-1) = 6

Therefore Equivalent weight of KBrO₃ = M/n-factor = M/6

Hope it helps!!

"1 mole of any gas at NTP OCCUPIES 22.4 LITRES of VOLUME."

so, number of MOLES in 1.12 litres of the gaseous substance = 1.12/22.4 = 0.05

given that,

mass of 0.05 moles of the gaseous substance is 0.5 grams

Hence, mass of 1 mole of the gaseous substance is 10 grams

Therefore the molecular mass of the gaseous substance is 10 grams.

Hope it helps!!

Hey
Ice is having DENSITY LESS than that of WATER which makes it to float in it but in case of alcohol, density of alcohol is less than that of ice therefore it SINKS.

Hope it helps :))

Because their are not in FREE STATE

HEYA!!
---------

✔An electrolyte in solid state does not CONDUCT ELECTRICITY because the free ions movement is not possible . The inter molecules space in SOLIDS is NEGLIGIBLE. Hence the ions cannot move about FREELY in solid state.

----------------------------------------------------------------------------------------------------

1.Calculate the empirical FORMULA MASS.


2.Divide the gram molecular mass by the empirical formula mass.

3.Multiply each of the subscripts within the empirical formula by the number CALCULATED in Step 2.

It is dected in some PATHOLOGY CONDITIONS

In Frenkel defects, the IONS leave their POSITIONS and OCCUPY interstitial sites.

CsCl is does not show Frenkel defect because -

-The ratio of radius between the two is not sufficient to allow the ions to occupy interstitial sites.

-The coordination NUMBER of CS is high which LEADS to the strong force of attraction between the ions so they can not move from their space.

AIM : To show that burning of magnesium ribbon is a chemical change.

MATERIAL REQUIRED : Magnesium WIRE , tongs , burner.

Procedure :

1. Take a strip of magnesium ribbon and hold it with the help of tongs.

2. INTRODUCE it into the flame of the burner.

OBSERVATION :

Magnesium ribbon  burns with dazzling light and WHITE substance is formed which is magnesium oxide. This HAPPEN due to following reaction :-

CHEMICAL REACTION :

2Mg ( s ) + O₂ ( g ) -------------->  2MgO ( s )

CONCLUSION :-

• Burning of magnesium in presence of oxygen to form magnesium oxide is a combination reaction and an exothermic process because heat and light are produced.

The different chemical materials that can be used in soil to adjust the pH are chalk, slaked LIME, or QUICK lime.

The chemical NAME of chalk is calcium carbonate (CaCO3), slaked lime is calcium HYDROXIDE (Ca(OH)2), and calcium oxide (CAO).

All these three are calcium salts.

Some STANDARD temperatures/pressures EMPLOYED are 115 °C/10 p.s.i., 121°C/ 15 p.s.i., and 132 °C/27 p.s.i. (psi=pounds per SQUARE INCH).

Given that,
1 MOLE of FE has mass = 55.85 g
Then,
55.85 g of Fe = 1 mole of Fe
=6.022 x 10²³ ATOMS of Fe
558.5g contains =6.022 x 10²³/55.85 x 558.5
=6.022 x 10²⁴ atoms of Fe.

Hope it helps you
^_^

Hey mate!!!

ur ans.....

Methods of PREPARATION of ALDEHYDES

Preparation of Aldehydes:From hydrocarbons: Aldehydes are OBTAINED by the ozonolysis of alkenes followed
•by REACTING the ozonolysis products with ZINC dust and water. ...

•By oxidation of methylbenzene: Toluene can be oxidised by strong oxidising agents to benzoic acid.

hope it helps

The STRUCTURE of CARBON monoxide (CO) is in the ATTACHMENT below↓↓

Hope it HELPS!!

hii FRIEND!!☺️
soda water vinegar and filtered tea is *homogenous* in nature
air is the*homogenous*mixture of gases if dust ENTERS in air it becomes *HETEROGENEOUS*
soil and wood are *heterogeneous* in nature
hope this may help you and please MARK my answer as brainliest☺️☺️
thank u so MUCH!!☺️

Oxidation state of 'S' in S₂O₃²⁻ :

2x + 3(-2) = -2

2x = -2 + 6

2x = 4

x = +2

Oxidation state of 'S' in S₄O₆²⁻ :

4x + 6(-2) = -2

4x - 12 = -2

4x = 10

x = +2.5

So,

In the above reaction, the oxidation state of sulphur CHANGES from +2 to +2.5.

Thus the change in oxidation state = 2.5 - 2 = 0.5

→ But the change occurs in TWO sulphur atoms, hence the total change in oxidation state is 2 x 0.5 = 1

Thus, n-factor of Na₂S₂O₃ = 1

So, EQUIVALENT weight = molecular weight / 1 = Molecular weight

Hope it helps!

...........HOPE this is HELPFUL

Pure SUBSTANCE is made up of only one TYPE of ATOM

In HF the HOMO orbital are the double degenerated
PI 2PX and 2py and pi orbitals

hope it helps
if it helps you MARK it as brainliest❤

I don't KNOW PLEASE you TELL me I do t know CHEMISTRY

The ELEMENT that is placed at the top of the Electro-chemical series (or ACTIVITY series) is Lithium.

It undergoes only oxidation.

While the element at the BOTTOM of this series is Fluorine

It can only UNDERGO reduction.

Hope it helps!!

Physical Properties of

Haloalkanes

1. Boiling point -

• As the length of the carbon chain increases, surface area increase, vanderwaal FORCE increases. So, boiling point increases.
• Haloalkanes have high boiling point than their parent hydrocarbon because between haloalkanes strong dipole-dipole forces present.
• From fluoride to chloride; surface area increases, vanderwaal force increases. So, boiling point also increases.
• With branching surface area decreases, vanderwaal force decreases. So, boiling point also decreases.
• Para-isomers have high melting point than the ortho and meta-isomer because para-isomers are symmetrical and have CLOSE packing.

→ NOTE:- Boiling point increase with the increase in carbon chain but decrease with increase in branching.

2. State -

• As the number of carbon increases, the surface area increases, vanderwaal force increases. So, they CONVERT from gas to liquid and then liquid to solid.

3. Polarity -

• Haloalkanes are polar due to the presence of more electro-negative halogens, even though they are insoluble in water. Because alkyl halide make dipole-dipole force with water, which is weaker than Hydrogen bond present between water molecules.

4. Density -

• Haloalkanes are heavier or DENSER than parent hydrocarbon as well as water.

In Anti-fluorite structure,

the cations OCCUPY all the tetrahedral voids.

while the anions are present at face-centered cubic(FCC) LATTICE points.

eg: Na₂O

Hope it HELPS!

Volume strength (or volume percent) is an OUTDATED TERM REFERRING to the volume of oxygen gas liberated from one volume of H2O2 solution (at 0OC and 1 atm.). For example: If the volume strength is given as 20-volumes, it means that 1cm3 of H2O2 will produce 20cm3 of oxygen gas

To MAKE it INERT. i.e. UNREACTIVE

Hey MATE...
FIRST of all your question is not clear... What you want to ask, it is not written here...

But I should answer your question
QUESTION ==
ALLOY of gold & copper weight 100 gm contains 97 gm of gold

ANSWER ==
Alloy of gold & copper weight 100 gm
97 gm of gold
Let the quantity of copper be X

=>(97+X)=100 gm
=>X=100-97 gm
=>X=3 gm
Therefore, quantity of
Copper =3gm
Gold=97 gm... ANSWER

I HOPE IT WILL HELP
#YAHYAAHMAD#

A molecule or ION with such a delocalized electrons is REPRESENTED by several contributing STRUCTURES (also CALLED resonance structures or canonical structures).

I hope it will HELP you.

The PRESSURE of a GIVEN amount of gas is directly proportional to its absolutetemperature, provided that the volumedoes not change (Amontons's law). The volume of a given gas sample is directly proportional to its absolutetemperature at CONSTANT pressure

CaBr2 is less IONIC than CaBr2, this can be explained by the following -

Fluorine is smaller in size than Br.

ELECTRONEGATIVITY of the elements decrease as we move down the group.

Since the ionic character of elements increases with the increasing electronegativity.

THUS CaF2 will have the MAXIMUM ionic character.

1 Sodium HYDROGEN carbonate NaHCO3
2 ACETIC acid CH3COOH
3 CALCIUM carbonate CaCO3
4 silicon dioxide or silica SiO2

BENZENE does not decolourise pink COLOUR of alkaline KMnO4, which is a TEST for unsaturation, but acetylene does decolourise alkaline KMnO4, that is benzene GIVES negative Bayer's test but Acetylene gives positive Bayer's test.

Distance between the 2nd and the 3rd ORBITS = distance of 3rd orbit – diistnace of SECOND orbit from the nucleus.

d3 = 0.529 x n2/z x 10-10 m = 0.529 x 9 x 10-10 m

d2 = 0.529 x 4 x 10-10 m

d3 – d2 = 0.529 x 5 x 10-10 m

= 2.645 x 10-10 m is the distance between the 2nd the 3rd orbits.

Hope it helps u and mark me as brainlist plzz i need it plzzzzzzzz

From ortho, para and meta-xylene, meta-xylene is the most stable.

m-xylene is more thermodynamically controlled product, whereas the other two are kinematically controlled product.

Methyl is an ortho-para directing group.
In ortho and para-xylene, electron density BECOMES HIGH DUE to +R effect of methyl group, whereas this is not SEEN in the CASE of meta-xylene.

Thus, m-xylene is more stable.

Hope it helps☺️☺️.

Mark me as brainlist ☺️☺️

The iupac name of this COMPOUND is KNOWN as the ethanal. it has a very EXTENSIVE uses in our life.….….….….….

Total VOLUME of 4M HCL solution = 2 Litre

consider volume of 5M HCl solution = ‘V’ Litre

So, volume of 2M HCl solution = (2-V) Litre

According to equation,

(M1V1 + M2V2) / (V1+V2) = M3

M1 = 5M; V1 = V Litre

M2 = 2M; V2 = (2-V) Litre

M3 = 4M; V1+V2 = 2 Litre

Substitute in equation,

[5 X V + 2 x (2-V)] / 2 = 4

5V + 4 – 2V = 8

3V = 4

So, Volume of 5M HCl solution, V = 1.33 Litre

Then, Volume of 2M HCl solution, 2-V = 2-1.33 = 0.67 Litre

This is because its Mg2+ and O2- , Ions have a GREATER number of charges .
# magnesium OXIDE STAYS solid at such high TEMPERATURES , it remains non-conductive.

Osmotic PRESSURE is the MINIMUM pressure which needs to be applied to a solution to prevent the inward flow of its PURE SOLVENT across a semipermeable membrane. It is also defined as the MEASURE of the tendency of a solution to take in pure solvent by osmosis.