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

Electrophilic aromatic substitution is an organic reaction in which an atom that is attached to an aromatic system (usually hydrogen) is replaced by an electrophile.

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An Organic compound (A) with molecular formula C,H,NO on heating with Br₂ and KOH forms a compound (B). Compound (B) on heating with CHCI, and alcoholic KOH produces a foul smelling compound (C) and on reacting with C.H.SO₂Cl forms a compound (D) which is soluble in alkali. Write the structures of (A), (B), (C) and (D).

Posted by Virendra Bankey 2 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Jatin Jatin 2 years, 5 months ago

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10g glucose is disolved in 400 g of solution, calculate percentage concentration of the solution

Posted by Kartik Sharma 2 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Deepak Sharma 2 years, 6 months ago

Answer= 10g/410g*100= 2.43%

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Mallikarjuna Appa 2 years, 6 months ago

Ans= 10g/400g × 100= 2.5%

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I think term 1 was easier

Posted by Aseem Mahajan 2 years, 6 months ago

CBSE > Class 12 > Chemistry

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Which is more reactive towards HCN benzaldehyde or acetone??

Posted by Ritika Kumari 2 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Aseem Mahajan 2 years, 6 months ago

<font size =72>⌬

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Aseem Mahajan 2 years, 6 months ago

Benzaldehyde , ketones are less reactive than sldehydes for HCN

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Deepanshu Sharma 2 years, 6 months ago

Benzaldehyde due to steric reaason

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Who is shocked?

Posted by Aseem Mahajan 2 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Dipali Gaykwad 2 years, 6 months ago

Resistance of any system is zero

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Calculate Emf of the following cell with nernst equation: Zn(s)/Zn^ 2 +(0.1 l ) || (0.01 M) Ag+/Ag(s) Given E ^ 0 * Zn * 2 + Zn = - 0.7 0 Ag+/Ag=+0.8C (Given log 10=1)

Posted by Lia Sharma 2 years, 6 months ago

CBSE > Class 12 > Chemistry

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Write a cell reaction of electrolysis of brine and find the anode product

Posted by Talbiya Fatma 2 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Unknown Ji 2 years, 6 months ago

Cell reaction 2H₂O(l) + 2Cl(aq) → H₂(g) + Cl2(g) + 2OH(aq) Chlorine is produced at anode Reaction of anode half:- 2C1 →Cl2 +2e

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Catalysis from surface chemistry, deleted?

Posted by Jyoti Yadav 2 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Liza 29 2 years, 6 months ago

Yes

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Bhawna Yadav 2 years, 6 months ago

2020

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Faraz Sonu 2 years, 6 months ago

Yes

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Propanal to butanal

Posted by C H E R R Y 🍒 2 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Aseem Mahajan 2 years, 6 months ago

Reduce with H2/Pd to get alcohol then treat with SOCl2 to make chloride then react with KCN and then reduction

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Naiyer Abbas 2 years, 6 months ago

First react with KCN then do hydrolysis then reduce with LiAlH4

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Electrochemistry

Posted by Biharilal Dinkar 2 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Arun Kumar 2 years, 6 months ago

Refer To First Para On Ch 3 Electrochemistry On Ncert Textbook

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Why amine salt are soluble in water not in organic solvent ?

Posted by Gurjeet Kaur 2 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Gurjeet Kaur 2 years, 6 months ago

Thnkuu ji

1Thank You

Aseem Mahajan 2 years, 6 months ago

H-bonding in water

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[Pt(NH3)2Cl(NO2)]

Posted by Ananya Gona 2 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Aseem Mahajan 2 years, 6 months ago

Diamminechloridonitrito-N-platinum(II)

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2x+3=2

Posted by Vikas Kumar Gupta 2 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Amrit Mall 2 years, 6 months ago

-1/2

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Harshdeep Kaur Mirok 2 years, 6 months ago

2x+3=2 2x=2-3 2x=-1 X=-1/2

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Ratikanta Rout -Xii-B- 22 Rout 2 years, 6 months ago

-1/2

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Convert ethyl cyanide to ethanoic acid

Posted by Raghuvansh Sharma 2 years, 6 months ago

CBSE > Class 12 > Chemistry

4 answers

Manvi Gupta 2 years, 6 months ago

Simply by hydrolysis

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Swagger Bro 2 years, 6 months ago

Simply by hydrolysis

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Aseem Mahajan 2 years, 6 months ago

get you carboxylic acid*

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Aseem Mahajan 2 years, 6 months ago

Use SnCl₂ + HCl to convert into aldehyde
Oxidation further will get you ketones

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Give reason: aldehydes are more reactive than ketones towards nucleophilic reaction

Posted by Lol My Life 2 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Kunal Patil 2 years, 6 months ago

The actual reasons behind this concept is of steric hinderance and +ve Inductive effect. These both factors are responsible for the more reactivity of aldehydes towards nucleophilic reaction than Ketones.

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Mansi Baranwal 2 years, 6 months ago

This is due to two reasons 1. Steric reason(presence of bulkier groups on either side of ketones) . 2. Electronic reason(+I effect of alkyl group)

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Aseem Mahajan 2 years, 6 months ago

Less steric hinderence
Greater electrophilicity than ketones

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Calculate the masses of cane sugar and water required to prepare 250g of 25%cane sugar solution

Posted by Sheetal Kumari 2 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Aditya Yadav 2 years, 6 months ago

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Calculate the molarity of 1 liter of solution of 93% of H2SO4 1.84gper ml

Posted by Sonila Bhutia 2 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Manya Khera 2 years, 6 months ago

Molarity=mass percent*10*density÷molecular mass of the solute =(0.93*10*1.84)÷98 =0.174 mol/l

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Sanjay Thanda 2 years, 6 months ago

Molality = 93/98/91×1000= 10.42

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What is adsorption?

Posted by Aditi Gupta 2 years, 6 months ago

CBSE > Class 12 > Chemistry

4 answers

Mansi Baranwal 2 years, 6 months ago

Accumulation of one substance over the surface of another substance is called adsorption. The substance getting adsorbed is adsorbate. The substance providing it's surface for adsorption is adsorbent.

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H K 2 years, 6 months ago

Process of accumulating of adsorbate molecules on the surface of the adsorbent instead of in the bulk is called adsorption.

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Utkarsh Singh 2 years, 6 months ago

Adsorption is the process of attracting and holding a substances molecules on the surface of a liquid or solid, resulting in a large concentration of molecules on the surface

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Utkarsh Singh 2 years, 6 months ago

It is the phenomenon in which adsorbate is accumulated on the surface of adsorbent

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dependence of activation energy in d and f block elements

Posted by Jeya Selva 2 years, 6 months ago

CBSE > Class 12 > Chemistry