CBSE > Class 12 > Chemistry | CBSE Board | Homework Help

No. Of atoms present in element Y = a No. Of octahedral voids = a No. Of atoms present in X = a*⅔ Ratio = x:y = a*⅔*3:a*3 = 2:3 The formula of the compound = x2y3.

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On the basis of CFT, write electronic configuration of d4 ion if deltanot greater than pairing energy

Posted by Kavya S 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Nidhi Bharti 4 years, 5 months ago

T2g4

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Transition elements show magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost same spin only magnetic moment? (i)Co³+ (ii)Cr²+ (iii)Mn²+ (iv)Cr³+

Posted by Shivam Agrawal 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Kavya S 4 years, 5 months ago

Co3+ - 4.8, cr2+ - 4.8 , Mn2+ - 5.9, Cr3+ - 3.7.So,Co3+ and Cr2+ have same magnetic moment

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Determination of formula of the compound?

Posted by Udit Jayapuria 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 5 months ago

Chemical formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. If a compound's chemical formula cannot be reduced any more, then the empirical formula is the same as the chemical formula.

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How to prepare for school viva... For physics & Chemistry...

Posted by Shivi ?? 4 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

Mr. Badmash 4 years, 5 months ago

You can prepare one chapter by own. And practical knowledge is must . Because they first ask from practical then from theory if you can't answer properly

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Dhruv .. 4 years, 5 months ago

Just offer something fantasy to your external?

3Thank You

Lakshya Sharma 4 years, 5 months ago

Simple bro do 1 chapter . They will ask from that chapter...

1Thank You

Kavya S 4 years, 5 months ago

In my scl for practicals questions are from, 1.thorough with the experiment 2.requirements needed 3.reason for the color and observations,etc U should be thorough in each experiment in and out

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An aqueous solution of a dibasic acid containing 35.4g of acid

Posted by Niti Shree 4 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Mr. Badmash 4 years, 5 months ago

What you want to ask????

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Sia ? 4 years, 5 months ago

Please ask question with complete information.

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Pls somebody say how to finish reading chemistry in 5 days

Posted by Kavya S 4 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Kavya S 4 years, 5 months ago

Thank u kanishca?

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Kanishca Ar 4 years, 5 months ago

Day 1..practice all. The naming reaxn and bookback exercise... Day 2 go through all the numericals from solid state electrochemistry chemical kinetics and solutions.. Its better if u start with bookback Day 3..focus on conceptual and application based qn with d and fitness block elements and coordination compounds.. Learn to name.. Compound U have to spent more tym on p. Block.. Day 4 repeat..(I mean.. Concentrate everything) Day 5..repeat... More Practise u do.. The more u become comfortable with your chapters V have our xam on 18th and s.. U could achieve more marks.. Practise daily man I hope this helps...

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Guys.. Do u think our xams will be postponed??..... I think.. Its better to finish it as scheduled .

Posted by Kanishca Ar 4 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

Har Har Mahadev 🙏 4 years, 5 months ago

I think that exam will not postponed.

4Thank You

Hey Kriti 4 years, 5 months ago

I want the exam should be online ??

5Thank You

Kavya S 4 years, 5 months ago

I want the exam to be postponed

6Thank You

Jass . 4 years, 5 months ago

I don't think so that exam will be postponed.

4Thank You

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Why amorphous solids have short range order?

Posted by Abhi Yaduvanshi 4 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 4 years, 5 months ago

The well-defined short-range order is a consequence of the chemical bonding between atoms, which is responsible for holding the solid together.

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Shraddha Verma 4 years, 4 months ago

As the particles are notvarranged in a definite pattern for a long time

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Nomemclature example

Posted by Akriti Singh 4 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Gautam Kumar Gautam Kumar 4 years, 5 months ago

C-Cch3=C-C-Cch3.ch3-C

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P....... ........ 4 years, 5 months ago

In example (1) the longest chain consists of six carbons, so the root name of this compound will be hexene. Three methyl substituents (colored red) are present. Numbering the six-carbon chain begins at the end nearest the double bond (the left end), so the methyl groups are located on carbons 2 & 5. The IUPAC name is therefore: 2,5,5-trimethyl-2-hexene.

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Define lattice

Posted by Rishitha Poleboina 4 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Shraddha Verma 4 years, 4 months ago

It is the smallest unit of a crystal which when repeated gives the whole crystal

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Deepsan Basnett 4 years, 5 months ago

Three dimensional arrangement of points (atoms, molecules or ion ) in space is called lattice.

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What is molar conductivity ? Write the effect of dilution on different conductivities

Posted by Sadik Ali 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 5 months ago

The molar conductivity is defined as the conducting power of all the ions that are formed by dissolving a mole of electrolyte in a solution.
Molar conductance is dependent on the concentration of the electrolyte. When the solution is dilute the number of ions available per unit volume reduces, resulting in the reduction of the conductivity.

The molar conductivity of both weak and strong electrolytes increases with a decrease in concentration or dilution.
The molar conductivity is the conductivity offered by one mole of ions.
Even after dilution, we are still considering the same unit mole of ions.
But however, the increased dilution results in the dissociation of more electrolytes into ions and effectively increasing the number of active ions in the solution.
These active ions impart more conductivity.

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0.90 gram of a solute dissolved in a 87.90 gram of benzene this raise the boiling point of benzene by 0.25 degree Celsius if the molecular mass of the solute 103 gram per mole then calculate the molar elevation constant of benzene

Posted by Simi Hearts 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 5 months ago

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Calculate the molar elevation constant of a solvent if 0.1 molal solution of substance prepared in it boils at 100.05 °c ( boiling point of pure solvent in 100°c)

Posted by Simi Hearts 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Shraddha Verma 4 years, 4 months ago

0.5

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Write the formula of an oxo_anion of manganese (mn)in which it shows the oxidation state equal to its group number

Posted by Abhi Yaduvanshi 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 5 months ago

The formula of an oxo-anion of manganese (Mn) in which it shows the oxidation state equal to its group number is {tex}MnO_4^{-}{/tex}. Here, oxidation state of Mn is +7 which is same as is its group number.

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Is ncert is enough to score 80+

Posted by Prashant Sher Yadavanshi 4 years, 5 months ago

CBSE > Class 12 > Chemistry

5 answers

I A 4 years, 5 months ago

Yes

2Thank You

Paridarshan Sahoo 4 years, 5 months ago

101% out of 100%

3Thank You

Abhi Yaduvanshi 4 years, 5 months ago

Yes bro?????

2Thank You

Sonam Dwivedi 4 years, 5 months ago

Ofcourse yes ☺

1Thank You

Vicky D 4 years, 5 months ago

Yes,if you read line by line and with all example and ouestion ?. All the best ?

2Thank You

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In a first order Reaction . the concentration of reactant decrease from0.8 m to 0.4m in 10 mins . calculate time taken for concentration to change from 0.1 m to 0.0025 m.

Posted by Satpal Bawa 4 years, 5 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Do anybody know how to solve log questions and.. How do u solve antilog without log tables.. Do they provide log table book in xams?

Posted by Kanishca Ar 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Technical Mind 4 years, 5 months ago

Specific log values are given in exams. Values used in NCERT can be memorised for better results. Needless to mention, they will be given in CBSE exams

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When to use 'chloro' & 'chlorido' in IUPAC naming of coordination compounds ?

Posted by D D 4 years, 5 months ago

CBSE > Class 12 > Chemistry

3 answers

Kanishca Ar 4 years, 5 months ago

V use chloro when chlorine is present as a counter ion.. Outside the bracket.. In most cases v won't get this.(potassium mostly) . Chlorido when it is a ligand

1Thank You

Mr. Badmash 4 years, 5 months ago

We use chloro in organic chemistry and chlorido in coordination compound

1Thank You

Rock ×Himanshu 4 years, 5 months ago

Hamara mann ??

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How does molar conductivity vary with increase in concentration for strong electrolyte and weak electrolyte? How can you obtain limiting molar conductivity for weak electrolyte?

Posted by Aniket Singh 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 5 months ago

There is sharp increase in the number of ions in the solution. Hence, the molar conductivity of a weak electrolyte rises steeply at low concentration. (ii) Strong electrolytes: The molar conductivity of a strong electrolyte decreases slightly with the increase in concentration.

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Why are liquids and gases categorised as fluids?

Posted by P....... ........ 4 years, 5 months ago

CBSE > Class 12 > Chemistry

3 answers

Abhi Yaduvanshi 4 years, 5 months ago

Liquids and gases are fluids because they have tendency to flow ,i.e, their molecules can flow from one place to another easily

2Thank You

Royal Thakur ? 4 years, 5 months ago

Pk bro ....?

1Thank You

Rajandeep Kaur 4 years, 5 months ago

Liquids and gases are categorised as fluids because of their ability to flow. Fluidity in these states are due to the fact that molecules are free to move.

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what are the Anomalus behaviour of nitrogen?

Posted by Dhivyasree Mohan 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Aniket Singh 4 years, 5 months ago

1. Nittogen is diatomic while other group members are tetratomic. 2. N2 shows least catenation properties but other members show catenation property. 3. N2 have maximum covalency '4'

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How to do test of ketonic group

Posted by Ayushi Singh 4 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Aniket Singh 4 years, 5 months ago

By sodium nitroprusside test

3Thank You

P....... ........ 4 years, 5 months ago

Presence of ketonic group is confirmed. Dissolve a small quantity of sodium nitroprusside in about 1 ml of distilled water in a clean test tube and then add a small quantity of the given compound. Shake the test tube well and add sodium hydroxide solution dropwise. Red colouration.

1Thank You

ANSWER

How to gain 90%in chemistry????

Posted by Anchal Sharma 4 years, 5 months ago

CBSE > Class 12 > Chemistry

5 answers

Kavya S 4 years, 5 months ago

Use pradeep's chemistry

0Thank You

Prashant Sher Yadavanshi 4 years, 5 months ago

Complete all back exercises and examples of ncert book. Make notes

0Thank You

Ajay Rao 4 years, 5 months ago

By studying ??

3Thank You

Jyoti Dhatterwal 4 years, 5 months ago

Attend classes regularly, make notes, study chemistry with full energy and heartily.

3Thank You

Priyanshu Kumar Sahu 4 years, 5 months ago

Understand 100% chemistry You don't have to gain 90% in chemistry

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ANSWER

chain isomers of C7H15OH

Posted by Shrestha Kumar Singh 4 years, 5 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Write the types of solution on the basis of solubility

Posted by Monika Malviya 4 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

P....... ........ 4 years, 5 months ago

Depending upon the dissolution of the solute in the solvent, solutions can be categorized into supersaturated solution, unsaturated and saturated solutions.

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Which reference book is best for chem class 12

Posted by Laxmi Singh 4 years, 5 months ago

CBSE > Class 12 > Chemistry

5 answers

Bobby Nishad 4 years, 5 months ago

ABC

5Thank You

Satyam Jaiswal 4 years, 5 months ago

According to me Nootan's publication books are best

3Thank You

Sony Chauhan 4 years, 5 months ago

Arihant is best

4Thank You

Sabhyata Pandey 4 years, 5 months ago

Arihant ?

2Thank You

Komal Yogi 4 years, 5 months ago

I think pradeep would be a good book

3Thank You

ANSWER

Co(II) is more stable in aqueous solution but in presence of strong ligand it easily oxidized

Posted by Abhi Yaduvanshi 4 years, 5 months ago

CBSE > Class 12 > Chemistry

3 answers

.Aks Kumar Singh Daksh Prajapati 4 years, 5 months ago

I can't send you photo otherwise i explain you in detail

0Thank You

.Aks Kumar Singh Daksh Prajapati 4 years, 5 months ago

Because in strong ligand pairing of electron gets start and one unpaired electron is left in Co2^+ and hence it loose this electron and get easily oxidised to form Co3^+

2Thank You

Abhi Yaduvanshi 4 years, 5 months ago

Give reason ?

1Thank You

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