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In case of ideal solution interaction between solute-solvent particles remains same as that of solute-solute ans solvent-solvent particle interaction whereas in case of non ideal solution it either increases or decreases.

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Why covalency increases down the group

Posted by Sree Ramana 5 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Rohit Krishna 5 years, 6 months ago

Due to the presence of vacant d and f orbitals, elements down a group can expand their covalency beyond a value that is assigned to them.While the first member of the group can't expand its covalency due to the absence of d and f orbitals.

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What is colloidal state

Posted by Gurbhej Gill 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Parva Rastogi 5 years, 6 months ago

A solution a which particle cannot pass through the filter paper and have range between 10 nm to 100nm is known as collidal solution this state is known as collidal state

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covert it 1. isopropyl chloride to 2-methylpropionaldehyde

Posted by Anandita Dhal 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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differentiate bw molality and molaeity of a solution. what is the effect of change in temperature of a solution on its molality and molarity

Posted by Malkiat Singh 5 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Aditya Kishore 5 years, 6 months ago

Molality of a solution is defined as moles of solute per kiogram mass of solvent. Molarity of a solution is defined as moles of solute per litre volume of solution. Molarity of a solution depends on volume of solution, and since volume depends on temperature, therefore molarity depends on temperature. But molality is independent of temperature.

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Lower alcohols are highly soluble in water but higher alchols are less soluble in water

Posted by Sangam Gupta 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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? ? 5 years, 6 months ago

Due to their long hydrocarbon chain they are unable to be soluble as they become highly unpolar and water being polar is unable to dissolve long chained hydrocarbon parted alcohol..

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2.44 gm of benzoic acid is dissolved in benzene to form 500ml solution than find out M and F .

Posted by Suhani Sachdeva 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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P- dichlorobenzene has higher melting point than its o and m- isomers

Posted by Vipul Kaushal 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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? ? 5 years, 6 months ago

Its could also be due to sterric hinderance. O and m isomers of dichlorobenzene are less stable as compared to p-dichlorobenzene and that's due to sterric hinderance. Hence the melting point of o and m are not so higher to break as p have.

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? ? 5 years, 6 months ago

Its not due to hydrogen bonding as there is no provision due to absence of o, f or n ....in this case it is due to symmetry in p dichlorobenzene which helps in easy paking of molecules and thus increasing mpt

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Shravan Kapadia 5 years, 6 months ago

Due to inter molecular hydrogen bond in p dichlorobenzene

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What is the electro galvanic cell

Posted by Santanu Kumar Behera 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Yogita Ingle 5 years, 6 months ago

Galvanic Cell: The electrochemical cell which uses chemical energy to produce electrical energy is called galvanic cell or voltaic cell, e.g. Daniell Cell.

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Nacl or cacl2 is used to clear snow on roads.why?

Posted by Anushka Sharma 5 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Insha Khalid 5 years, 6 months ago

Because by addition of volatile substance depression in freezing point occur and then snow melts.

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? ? 5 years, 6 months ago

Due to depression in freezing point temperatures

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? ? 5 years, 6 months ago

Due to depression in freezing point

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Briefly explain non ideal solution

Posted by Tejendra Singh Gurjar 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Insha Khalid 5 years, 6 months ago

Those solution which donot obey Roults law

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Gaurav Seth 5 years, 6 months ago

Non-ideal solution: Solutions which do not obey the Raoults law over the entire range of concentration, are called non-ideal solutions. The vapour pressure of non-ideal solutions is either higher or lower than the ideal, i.e. predicted by Raoult's Law.

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In tearms of bond theory what is the diffrence between conductor of semico ductor?

Posted by Apurva Rupner 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Kuldeep Rautela 5 years, 6 months ago

In conductors the valence band is partially filled and overlaps high energy conduction band and hence electrons can easily flow . Whereas in case Semiconductors have a small energy gap between the valence band and the conduction band. Electrons can make the jump up to the conduction band, but not with the same ease as they do in conductors.

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Define NON IDEAL SOUTION

Posted by Prof Gurdev Singh 5 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

? ? 5 years, 6 months ago

The solution which does not obey Raoult's law at any range of concentration and at all temperature are called Non ideal solutions

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Yogita Ingle 5 years, 6 months ago

The solutions which don’t obey Raoult’s law at every range of concentration and at all temperatures are called Non-Ideal Solutions. Non-ideal solutions deviate from ideal solutions and are also known as Non-Ideal Solutions.

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In thin layer chromatogtaphy of alpha amino acid ,the chromatographic plate is usually developed by apraying a solution of (1) sodium chloride (2) potassium chloride (3) ninhydrin (4) ferric chlorode

Posted by Renu Sahu 5 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

? ? 5 years, 6 months ago

Ninhydrin

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The regent used for Elamans degradation of polypetides at the n- terminal is (1) pb-N=C=S (2) pb- N= C=O (3) pb-S-C=N (4) pb-O-C=N

Posted by Renu Sahu 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Difference between charial and acharial compound

Posted by Sunil Kunar 5 years, 6 months ago

CBSE > Class 12 > Chemistry

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Yogita Ingle 5 years, 6 months ago

A chiral molecule is one that is not superimposable on its mirror image. These molecules contain one asymmetric or chiral carbon atom. For example, butan-2-ol.
An achiral molecule, on the other hand, is one which is superimposable on its mirror image. For example, propan-2-ol.

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the sangrers regent used for the N- terminal amino acid determination is (1) ninhydrin (2) 1- fluoro2,4dinitrobenzen (3) phenyl isolatiocyanate (4) hydrazine )

Posted by Renu Sahu 5 years, 6 months ago

CBSE > Class 12 > Chemistry