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Baahubali ??????? 7 years ago

Vitamin H is also known as biotin and aids in metabolizing carbohydrate, protein,fat.Additionally it helps to produce fatty acids, promote healthy nervous tissue,bone marrow and sweat glands. Biotin is needed for healthy hair and skin. This vitamin may be used to treat certain disease

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methylcynide when treat with hcl

Posted by Bhumo Dhaeyou 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is normality?How is it calculated?

Posted by ਠੇਠ Speakers 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Kartik Periwal 7 years ago

No. Of gram equivalent / volume of solution in litre

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Draw the structure of the compound named 4-methylpent-30-en-2-one

Posted by Natasha Chaudhary 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

In nylon 6,6 what does the designation 6,6 mean?

Posted by Prakriti Mehta 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Vaidehi Gupta 7 years ago

It shows the no. of carbons in the monomers.. lyk nylon 66 has adipic acid(6 carbons) and hexame. diamine(6 carbons) nylon 6has caprolactum (6 carbons)

Ash Thunderbird ✔ 7 years ago

In nylon-6,6 the designation 6,6 means that monomers of nylon-6,6 i.e Adipic acid amd and hexamethylene diamine contains 6 carbom atoms each.

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HCHO is more reactive then cH3 - CHO toward addition of HCN

Posted by Pratiksha Tiwari 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Kartik Periwal 7 years ago

Because in HCHO the carbon is more elctrophiilic i.e. why CN- can easily attack on the carbon relative to ch3cho

4Thank You

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Draw structure 2-(2-chlorophenyl)-1-iodooctane Dam h to batao Gmail karo answer [email protected]

Posted by Gaurav Upadhyay 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Determine the type of cubic lattice to which iron crystals belongs if its unit cell has an edge lengthof 300pm and density of iron is 7.2g cm-3

Posted by Anisha Pal 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Nivetha Vijayakumar 7 years ago

Use the formula, d = ( Z* M) / ( a^3 * Na). a & d r gn, M of iron is 55.8, Na = 6.023 * 10^23. With these data find Z & with that gind the lattice.

Nivetha Vijayakumar 7 years ago

Use the formula d = ( Z *M) / ( a^3 * Na). Gn that, a = 300pm, d = 7.2 g cm^(-3). We know that, M of iron is 55.8. Substitute the values & get Z value, with that find the lattice.

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What is the ethanol

Posted by Tejashvi Singh 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Grace Mercy 7 years ago

Ethanol is a type of alcohol, in which two carbons are present.... CH3-CH2-OH (ETHANOL)

Komal Tatrari 7 years ago

Ethanol is an organic compound containing alcoholic group it can be prepared by the fermentation of sucrose under the action of enzyme invertase and zymase

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What is allotrops??

Posted by Taqdees Fatima 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Komal Tatrari 7 years ago

Compounds having same molecular formula , chemical properties but different structure like in carbon there are four allotropes diamond , carbon nanotube , graphite ,fullerens

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Define micelles.

Posted by Gourav Verma 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Gourav Verma 7 years ago

The aggerated particles formed by combination of electrolytes at higher concentration are known as associated clloids or micelles.e.g.soap.

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What are enantiomers?

Posted by Grace Mercy 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Komal Tatrari 7 years ago

In simple term they can be said as optical isomers of each other d dextro or l laevo they are isomers b/c they rotate ppl in different manner

Suhani Rana? 7 years ago

These are optically active compound which are mirror image of each other and they have same melting point, boiling point and solubility but rotate the plain polarised light in opposite direction up to same extent.

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How can we distinguish between alcohols and aldehydes??

Posted by Grace Mercy 7 years ago

CBSE > Class 12 > Chemistry

3 answers

Aiena Bhatnagar 7 years ago

Tollen

Shivam Keshri 7 years ago

Fehling's test, Tollens' test, 2,4DNP test, Schiff's test are all given by only aldehydes...so it can distinguish between aldehyde and alcohols

Komal Tatrari 7 years ago

Tollens and fehlings test will be given only by aldehyde not by alcohol ,dnp test will be given only by aldehyde not by alcohol and lucas test only by alcohol , victor mayor by alcohols only

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Lanthanoid contraction

Posted by Akanksha Nigam 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Grace Mercy 7 years ago

The regular decrease in atomic radii and ionic radii from La to Lu, due to inert pair effect, due to which outer electrons dont take part in reactions, instead they are attracted by the nucleus, because of poor shielding effect of f orbitals.

Suhani Rana? 7 years ago

The regular decrease in atomic and ionic radii from La to Lu in lanthanoid series is known as lanthanoid contraction

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is metallurgy important to study in the last day....? i am not able to remember....what should i do ..????? please help me .....

Posted by Dharshika As 7 years ago

CBSE > Class 12 > Chemistry

4 answers

Aiena Bhatnagar 7 years ago

Ashok Maurya 7 years ago

Ncert questions are enough.

Grace Mercy 7 years ago

NCERT textbook exercise is more than enough

Rj Singh 7 years ago

Its not so difficult if u only see its ncert question that is sufficient..

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Explain why PCl5 is ionic in nature in the solid state ????

Posted by Rajat Mahour 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Dharshika As 7 years ago

because it exists as [pcl4]- as well as [pcl6]+

ANSWER

What is cannizaro reaction?

Posted by Grace Mercy 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Suhani Rana? 7 years ago

It is dispropotinate reaction those aldehyde which do not have alpha hydrogen and occur in presence of concentrated NaOH or KOH

ANSWER

Calculate emf

Ag/Ag+(10^-3M)//Cu2+(10^-1M)/Cu

Δė=+0.46v

Posted by Surya Pra 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Ashok Maurya 7 years ago

E=E°-0.0591/nlog (product)/(reactant)

Grace Mercy 7 years ago

Use nernst equation.....

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The cell in which following reaction occurs: 2Fe^3+ + 2I^---> 2Fe^2+ +I2 has E°cell=0.236 V at 298 K. Calculate the standard Gibbs energy and the equilibrium constant of the cell reaction. Query-In this ques according to the formula ∆G°=-nfE°cell and in place of n we take maximum electron change that should be 3 but here it is taken as 2.Why it is so?

Posted by Chhavi Sachdeva 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Komal Tatrari 7 years ago

2 I ^-1 →I2 +2e– this is oxi half rxn 2Fe^+3 +2e– →2Fe^+2 in overall rxn n=2

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Cr2+ is reducing while Mn3+ is oxidizing although both have same d4 configuration

Posted by Pankaj Kumar 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Suhani Rana? 7 years ago

And ab tumhara ques ye bi ho skta h ki cr2+ lose hi kyun krta gain bi to kr skta h na d5 bnne ke lie to uska ans ye h ki Mn me nuclear charge jada hota h to uski ability gain krne ki jada h.

Suhani Rana? 7 years ago

This is because cr2+ by losing 1 electron attain stable t2g level half filled configuration and hence act as reducing agent while Mn3+ by gaining 1 electron attain stable d5 configuration and hence is oxidizing agent.

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What is frekland reagent

Posted by Siya Yadav 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why we not prefer to store grignard agent in air?

Posted by Nïßhåñt Bhàrdwàj 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Preeti Takhar 7 years ago

Reacts with moisture present in air and forms alkanes

Hanu Saini 7 years ago

As it react and form methane

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Why there is depression in freezing point when add some solvent to water?

Posted by Nïßhåñt Bhàrdwàj 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Takhar 7 years ago

On adding solvent we decrease the vapour pressure hence there is a resultant decrease in freezing point

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Fe2+mno4+h complete the reaction

Posted by Nadiya Khan 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Takhar 7 years ago

Fe3+ and h2o along with mn2+

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Give an example of zone refining of metals

Posted by Preetibardhan Panda 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Takhar 7 years ago

Semiconductors like germanium

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How i can complete my full syllabus of chemistry in 2 days

Posted by Pankaj Kumar 7 years ago

CBSE > Class 12 > Chemistry

6 answers

Grace Mercy 7 years ago

Do only NCERT exercises.... Its the best way..... N.... Its will be done in one day only

4Thank You

Pankaj Kumar 7 years ago

Don't give faltu le answers

Pankaj Kumar 7 years ago

I am just joking don't do timepass

Preeti Takhar 7 years ago

By skipping all tooics?

Hanu Saini 7 years ago

Ys by doing only selected topics

Harsh Sharma 7 years ago

By using (FARRE)

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What is the configuration of d6 according to weak field ligands

Posted by Jass Brar 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Komal Tatrari 7 years ago

For tetrahedral it will be eg³ t2g³ and for octahedral it will be t2g⁴ eg²

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TeO2 is an oxidising agent

Posted by Gurpreet Singh 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Pankaj Kumar 7 years ago

Yes

ANSWER

What is racemisation mixture

Posted by Kartik Aggarwal 7 years ago

CBSE > Class 12 > Chemistry

3 answers

Chhavi Sachdeva 7 years ago

A mixture which contains 50%of the d form and 50%of the l form is known as a racemic mixture. D form is known as the dextrorotatory form and L form is known as the levorotatory form. D form is when the plane polarised light passed through the nicol prism is rotated clockwise and for L form it is vice versa.

Taqdees Fatima 7 years ago

Mixture of 50% retention and 50% inversion

Gaurav Seth 7 years ago

A mixture of the equal Amounts of the two enantiomers is called the Racemic Mixture or Racemic Modification.