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Baahubali ??????? 6 years, 9 months 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 6 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is normality?How is it calculated?

Posted by ਠੇਠ Speakers 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Kartik Periwal 6 years, 9 months ago

No. Of gram equivalent / volume of solution in litre

ANSWER

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

Posted by Natasha Chaudhary 6 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

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

Posted by Prakriti Mehta 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Vaidehi Gupta 6 years, 9 months 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 ✔ 6 years, 9 months 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.

ANSWER

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

Posted by Pratiksha Tiwari 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Kartik Periwal 6 years, 9 months ago

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

4Thank You

ANSWER

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

Posted by Gaurav Upadhyay 6 years, 9 months 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 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Nivetha Vijayakumar 6 years, 9 months 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 6 years, 9 months 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.

ANSWER

What is the ethanol

Posted by Tejashvi Singh 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Grace Mercy 6 years, 9 months ago

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

Komal Tatrari 6 years, 9 months 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

ANSWER

What is allotrops??

Posted by Taqdees Fatima 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Komal Tatrari 6 years, 9 months ago

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

ANSWER

Define micelles.

Posted by Gourav Verma 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Gourav Verma 6 years, 9 months ago

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

ANSWER

What are enantiomers?

Posted by Grace Mercy 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Komal Tatrari 6 years, 9 months 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? 6 years, 9 months 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.

ANSWER

How can we distinguish between alcohols and aldehydes??

Posted by Grace Mercy 6 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Aiena Bhatnagar 6 years, 9 months ago

Tollen

Shivam Keshri 6 years, 9 months 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 6 years, 9 months 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

ANSWER

Lanthanoid contraction

Posted by Akanksha Nigam 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Grace Mercy 6 years, 9 months 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? 6 years, 9 months ago

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

ANSWER

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 6 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Aiena Bhatnagar 6 years, 9 months ago

Ashok Maurya 6 years, 9 months ago

Ncert questions are enough.

Grace Mercy 6 years, 9 months ago

NCERT textbook exercise is more than enough

Rj Singh 6 years, 9 months ago

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

ANSWER

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

Posted by Rajat Mahour 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Dharshika As 6 years, 9 months ago

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

ANSWER

What is cannizaro reaction?

Posted by Grace Mercy 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Suhani Rana? 6 years, 9 months 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 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Ashok Maurya 6 years, 9 months ago

E=E°-0.0591/nlog (product)/(reactant)

Grace Mercy 6 years, 9 months ago

Use nernst equation.....

ANSWER

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 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Komal Tatrari 6 years, 9 months ago

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

ANSWER

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

Posted by Pankaj Kumar 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Suhani Rana? 6 years, 9 months 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? 6 years, 9 months 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.

ANSWER

What is frekland reagent

Posted by Siya Yadav 6 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why we not prefer to store grignard agent in air?

Posted by Nïßhåñt Bhàrdwàj 6 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Preeti Takhar 6 years, 9 months ago

Reacts with moisture present in air and forms alkanes

Hanu Saini 6 years, 9 months ago

As it react and form methane

ANSWER

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

Posted by Nïßhåñt Bhàrdwàj 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Takhar 6 years, 9 months ago

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

ANSWER

Fe2+mno4+h complete the reaction

Posted by Nadiya Khan 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Takhar 6 years, 9 months ago

Fe3+ and h2o along with mn2+

ANSWER

Give an example of zone refining of metals

Posted by Preetibardhan Panda 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Takhar 6 years, 9 months ago

Semiconductors like germanium

ANSWER

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

Posted by Pankaj Kumar 6 years, 9 months ago

CBSE > Class 12 > Chemistry

6 answers

Grace Mercy 6 years, 9 months ago

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

4Thank You

Pankaj Kumar 6 years, 9 months ago

Don't give faltu le answers

Pankaj Kumar 6 years, 9 months ago

I am just joking don't do timepass

Preeti Takhar 6 years, 9 months ago

By skipping all tooics?

Hanu Saini 6 years, 9 months ago

Ys by doing only selected topics

Harsh Sharma 6 years, 9 months ago

By using (FARRE)

ANSWER

What is the configuration of d6 according to weak field ligands

Posted by Jass Brar 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Komal Tatrari 6 years, 9 months ago

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

ANSWER

TeO2 is an oxidising agent

Posted by Gurpreet Singh 6 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Pankaj Kumar 6 years, 9 months ago

Yes

ANSWER

What is racemisation mixture

Posted by Kartik Aggarwal 6 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Chhavi Sachdeva 6 years, 9 months 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 6 years, 9 months ago

Mixture of 50% retention and 50% inversion

Gaurav Seth 6 years, 9 months ago

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