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Name two main factors that favours a metal ions forming complex

Posted by Priya Shishodiya 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 1 year, 11 months ago

High denticity and low crystal field splitting enthalpy of ligand molecules or ions.

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Why aniline does not undergo Friedal - Craft reaction

Posted by Aarzoo Saini 1 year, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Anjan Karthi 1 year, 11 months ago

Aniline, being a Lewis base, and anhydrous Aluminium chloride (catalyst in Friedel-Craft reaction), being a Lewis acid, forms a highly stable and irreversible complex which prevents further reaction to take place in aniline.

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Aarzoo Saini 1 year, 11 months ago

Answer the question

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What do you mean by ideal solution 2 give examples?

Posted by Khushi Kumari 1 year, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Ankit Yadav 1 year, 11 months ago

Ideal situation is the solution which follows to raoult,s law....

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Anjan Karthi 1 year, 11 months ago

Solutions which follow Raoul's law under all possible ranges of concentrations of it's constituents are called IDEAL SOLUTION. Neither do the volume of it's constituents change upon mixing nor do their enthalpies.

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Following ions of 3d transition series are given Ti4+,Vi2+,Cr3+,Mn3+ Identify the ion which is a). Most stable in aqueous solution. b). a strong oxidising agent. c). colourless in aqueous solution.

Posted by Vaibhavi Rai 1 year, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Ashutosh Mishra 1 year, 10 months ago

A first order reaction is 10% complete in 20 min. The time taken for 19% completion is: fPET (Kerala) 2005] (a) 30 min (b) 40'min (c) 50 min (d)38 min (e) 45 min

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Anjan Karthi 1 year, 11 months ago

(a) Cr3+. (b) V2+. (c) Ti4+

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Fictional group of ketone

Posted by Nitin Bhardwaj 1 year, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Prateek Dubey 1 year, 9 months ago

RCOR

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Nitin Bhardwaj 1 year, 11 months ago

C=O

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Give the IUPAC name of benzene CH=CH-CHO

Posted by Priu S 1 year, 11 months ago

CBSE > Class 12 > Chemistry

5 answers

Vartika Pandey 1 year, 11 months ago

3 - phenylprop-2-enal

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Nitin Bhardwaj 1 year, 11 months ago

Prop 2 enal

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Saiyam Bajpai 1 year, 11 months ago

Prop-2-enal

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Dibyajyoti Sahoo 1 year, 11 months ago

3-phenylprop-2-enal

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Ayush Singh 1 year, 11 months ago

Prop-2-enal

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What is Lucas reagent?

Posted by Yash Vashisth 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishi Kumar 1 year, 11 months ago

It is a mixture of anhydrous zinc chloride with concentrated hcl

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What is quaternary structure of protein

Posted by Aarzoo Saini 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 1 year, 11 months ago

The quaternary structure of a protein is the association of several protein chains or subunits into a closely packed arrangement. Each of the subunits has its own primary, secondary, and tertiary structure. The subunits are held together by hydrogen bonds and van der Waals forces between nonpolar side chains.

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When a coordination compound cocl3.6nh3 is mixed with agno3. 3 moles of agcl are precipitated per mole of the compound. Write structural formula of the complex

Posted by Vanshika Singh 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 1 year, 11 months ago

[Co(NH3)6]Cl3.

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Treatment of benzaldehyde with HCN gives a mixture of two isomers which cannot be separated by fractural distillation. Explain why

Posted by Adithya A 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Dabral 1 year, 11 months ago

Almost all physical properties like boiling point are the same for such isomers. They also have identical chemical properties. Therefore, there is no property on the basis of which the two isomers can be separated even by careful fractional distillation.

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ANSWER

What is retard Reaction

Posted by Pratish Anand 1 year, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Preeti Dabral 1 year, 11 months ago

A retarder is a chemical agent that slows down a chemical reaction. For example, retarders are used to slow the chemical reaction hardening of plastic materials such as wallboard, concrete, and adhesives. Sugar water acts as a retarder for the curing of concrete.

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Anjan Karthi 1 year, 11 months ago

The Étard reaction is a chemical reaction that involves the direct oxidation of an aromatic or heterocyclic bound methyl group to an aldehyde using chromyl chloride.

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Determination of molarity and strength practical solutions

Posted by Priya Preeti 1 year, 11 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Practical que and solutions of chemistry

Posted by Priya Preeti 1 year, 11 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

pkb of aniline is more than that of methylamine

Posted by Rajveer Singh 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 1 year, 11 months ago

Higher pKb means lower basic character. This indicates that aniline has less basic character than methyl amine. This is true because the benzene ring in aniline induces -R effect to thereby, pull off electron density from nitrogen making electron donation tougher. But, in methyl amine, the methyl group shows +R effect and this, greater electron density and greater basic character.

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ANSWER

Ethylamine is soluble in water whereas aniline is not.

Posted by Gurpreet Singh 1 year, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Anjan Karthi 1 year, 10 months ago

Another possible explanation is that solubility of any substance in water is greatly affected by the presence of hydrogen bonds between the substance and water molecules (if any), provided the hydrogen bonds require an electronegative atom with AVAILABLE lone electron pairs. In aniline, -R effect of phenyl ring removes electron pair on nitrogen atom (so, LESS chance for hydrogen bonding). But, methyl amine has methyl group with +R effect which actually helps the methyl group to donate electron pairs to nitrogen, thereby increasing the electron density on nitrogen atom.

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Ashutosh Singh 1 year, 11 months ago

Due to resonance, aniline gets stabalise and it becomes difficult to remove electrons from it . Hence it is not soluble in water

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Write a note on classification of solid base on different winding force

Posted by Ghanashyam Beshra 1 year, 11 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Write a note on classification of solids based on different binding force

Posted by Ghanashyam Beshra 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Dabral 1 year, 11 months ago

Based on the nature of the forces that hold the component atoms, molecules, or ions together, solids may be formally classified as ionic, molecular, covalent (network), or metallic. The variation in the relative strengths of these four types of interactions correlates nicely with their wide variation in properties.

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Carboxylic acid and carbonyle group is same??

Posted by Divya. Kumari 2 years ago

CBSE > Class 12 > Chemistry

3 answers

Preeti Dabral 2 years ago

The main difference between carbonyl and carboxyl group is that carbonyl group consists of a carbon atom double bonded to an oxygen atom whereas carboxyl group consists of a carbonyl group and a hydroxyl group bonded to each other via the carbon atom of the carbonyl group.

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Aarzoo Saini 1 year, 11 months ago

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Nikita Jain 2 years ago

No, the carboxylic acid is COOH while carbonyl group is a C doubly bonded with O and 2 hydrogen atom.

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What is alcohol?

Posted by Priyanshu Patel 2 years ago

CBSE > Class 12 > Chemistry

2 answers

Monika Patel 2 years ago

Alcohol is a beverage drink that consists of ethanol

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Nidhi Yadav 2 years ago

When alcohol (-OH) group is attached to a alkyl group is called alcohol

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ANSWER

State preparation of ether

Posted by Amisha Singh 2 years ago

CBSE > Class 12 > Chemistry

2 answers

Preeti Dabral 2 years ago

At room temperature, ethers are pleasant-smelling colourless liquids. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points.

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Anjan Karthi 2 years ago

Ethers can either be treated by acid-catalyzed hydration of alkenes at 413 K, or by Williamson synthesis (Reaction between sodium alkoxide and alkyl halide to give alkoxy alkane and sodium halide).

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ANSWER

Acidity of alcohol

Posted by Songmit Lepcha 2 years ago

CBSE > Class 12 > Chemistry

2 answers

Himani . 1 year, 11 months ago

Acidity of alcohol is less in comparision to water as well as phenols due to its less tendency to loose H+ ion.

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Nidhi Yadav 2 years ago

Acidity of alcohol is depend on the Polarity of oxygen atom

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ANSWER

why do phenols have more boiling point than alcohols of comparable molecular mass

Posted by R.Sasi Kumar 2 years ago

CBSE > Class 12 > Chemistry

3 answers

Alok Mittal 1 year, 11 months ago

In simple we write only this Is because of resonance effect

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Anjan Karthi 2 years ago

Unlike those in alcohols, the -OH group in phenols are supported by a benzene ring that, through +R effect, provides greater electron density in the O atom. As a result, the oxygen atoms in phenols are more capable of stronger intermolecular hydrogen bonding with each other than alcohols, whose OH group is supported by alkyl group (-R effect). This, phenols have higher BP.

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Harsh Sharma 2 years ago

Loda bc

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ANSWER

[Cr(NH³)6]³±

Posted by Ananya Kasaudhan 2 years ago

CBSE > Class 12 > Chemistry

1 answers

Yashi Kushwaha 1 year, 10 months ago

If you need oxidation number than it is 3 We consider Cr=x NH3 is neutral outside bracket we have 3 X+(0*6)=3 X+0=3 i.e X=3

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Koi mycbse guide ka class 12 physics/chemistry/maths ka sample papers buy kiya h please 🙏 Pdf share kr do

Posted by Rounak Anand 2 years ago

CBSE > Class 12 > Chemistry

2 answers

Rounak Anand 2 years ago

Muh mein lega lund

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Harsh Sharma 2 years ago

Loda bc

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Which is more stable compound in nature

Posted by K. Priyanka_Xi_C_16 2 years ago

CBSE > Class 12 > Chemistry

1 answers

Sushma Pandey 2 years ago

Ph3C+ is most stable due to presence of three benzene rings which are resonance stabilised.although more compound are stable but this more srable

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Give reasons: (i) Benzoic acid is a stronger acid than acetic acid. (ii) Methanal is more reactive towards nucleophilic addition reaction than ethanal.

Posted by Sazid Sheikh 2 years ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Dabral 2 years ago

1. Due to greater electronegativity of sp² hybridised carbon to which carboxyl carbon is attached and greater resonance stabilization of carboxylate ion with the benzene ring, benzoic acid is a stronger acid than acetic acid.
2. Methanal is more reactive towards nucleophilic addition reaction than ethanal because carbonyl carbon of methanal is more electrophilic than that of ethanol. Also, due to +I effect of methyl group in ethanal, reactivity of ethanal decreases.

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ANSWER

What is dual cell

Posted by Priu S 1 year, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Dabral 1 year, 11 months ago

The dual cell heat exchanger consists of two porous fluid zones, namely a primary zone and an auxiliary zone. The two zones are solved simultaneously and are coupled only through heat transfer.

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Vector sum rules

Posted by Aniket . 2 years ago

CBSE > Class 12 > Chemistry