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Is it necessary to write balanced chemical rxns in xms??!

Posted by Ishika Tanwani 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Tanisha Brar 7 years, 11 months ago

In organic chemistry its not necessary at all but if we r talking about p-d-f block its necessary

ANSWER

What is meant by shape selective catalysis

Posted by Somu Yadav 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Adnan Raza 8 years ago

Zeolite or shape selective catalyst are microporous aluminosilicates ex:- ZSM-5

ANSWER

Tautumerism

Posted by Priyanshu Singh 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Anuj Yadav 7 years, 11 months ago

It is isomerism

ANSWER

What is enthalpy change

Posted by Gopal Gupta 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Kamal Singh Rawat 8 years ago

Enthalpy change means the change occurs in association and dissociation of an element.

ANSWER

Why is hf weaker than hcl

Posted by Rishit Kumar Rajesh 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Aditi Singh 7 years, 11 months ago

Because in HF there is intermolecular hydrogen bonding so it is unable to give H+

Adnan Raza 8 years ago

Cl is more bigger in size and less electronegative

ANSWER

what are esters?

Posted by Ajit Singh 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Tanisha Brar 7 years, 11 months ago

Rohit what u r talking about are ether not ester ; ester r those compound which have fruity smell and used as flavouring agent

Kamal Singh Rawat 8 years ago

2CH3COOH react in presence of H2SO4 and form ester (CH3CO—O—COCH3).

ANSWER

Define electrophoresis

Posted by Mayank Nalwa 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Adnan Raza 8 years ago

The movement of colloidal particles towards opposite charged electrode in an electric field is called electrophoresis

ANSWER

What are the important Mechanisms in Organic Chemistry for class 12

Posted by Mouli Kanala 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Tanisha Brar 7 years, 11 months ago

The machanism of hydration nd dehydrationand; all free radical machanism and also the.machanism of markownikow rule

Ibrana Trannum 8 years ago

The important

Bhargav Singh 8 years ago

SN1 and SN2

ANSWER

How to write a practical's experiment{past or present}

Posted by Lmgk Saini 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Propanoic acid to acetic acid it ???

Posted by Harbati Yadev 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Muzaina Fatima 8 years ago

CH3CH2COOH+Na(CaO)------->CH3CH3 (Decarboxylation) CH3CH3+Br2--------->CH3CH2Br CH3CH2Br+aq.NaOH------->CH3CH2OH CH3CH2OH+KMnO4-------->CH3COOH.

ANSWER

Name an element with which Silicon can be doped to given a p-type semiconductor?

Posted by Durgesh Bhardwaj 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Anuj Yadav 7 years, 11 months ago

Add previous group elements only

Rashi Bari 8 years ago

any trivalent impurity for example aluminium, gallium, boron, etc.

ANSWER

Blue print

Posted by Aaaaaa Bbbbbb 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Mohita Bamola 8 years ago

Blueprint is a reproduction of a technical drawing, documenting an architecture or an engineering design, using a contact print process on light-sensitive sheets.

ANSWER

Which is more reactive aldehyde or ketones of same m.wt?

Posted by Tarun Yadav 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Aditi Singh 7 years, 11 months ago

If u talk about NSR then also ketones are more reactive because carbon to which oxygen is attached have partial +I've charge which is stabilized by the +I effect of two alkyl groups

Aditi Singh 7 years, 11 months ago

Ketones are more reactive because they are more polar and tendency of a electrophile to attack is more because alkyl groups on both sides have their+I effect on oxygen which increases the electron density on oxygen

Kamal Singh Rawat 8 years ago

In ketone there are two CH3 group which make stable. So Nucleophile is difficult to addition. In aldehyde there are one CH3 group which make less stable than ketone. So Nucleophile is easily attack.

Deepa Chanwariya 8 years ago

Aldehydes are more reactive than ketone b'coz electrophilicity (rate of accepting electrons ) of aldehyde is high

ANSWER

(CH3)3ccho is does not aldol condensation comments

Posted by Asif Ali 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Anuj Yadav 7 years, 11 months ago

Absence of alpha hydrogen

ANSWER

Show graphically that the freezing point of a liquid will be depressed when a non voletile solute is dissolved in it. (b)The freezing point of a solution containing 0.3gm of acetic acid in 30.0gm of benzene is lowered by 0.450C.calcualte the vant Hoff factor (Kf for benzene = 5.12KKgmol-)

Posted by Deepika Kashyap 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Convert benzoyl chloride to benzonitrile

Posted by Jalaj Pruthi 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the structural difference between aniline and amilopectine?

Posted by Chanthu Pillai 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What does 6,6 signify in nylon 6,6

Posted by Maitri Rautela 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aanchal Gupta 8 years ago

Because its monomer units hexamethylene tetra amine and adipic acid both contain 6 carbons

ANSWER

2 chloro butanoic acid is strong acid than 3 chloro butanoic acid . why?

Posted by Rishi Patel 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Abhishek Tripathi 8 years ago

Due to -I effect,-I effect decrease with distance

ANSWER

Give the IUPAC name.when (1) 2-methyl-1- bromopropane is treated with sodium in the presence of dry ether. (2) 1- methyl cychohexane is treated with HI. (3) chloroethane is treated with silver nitrite.

Posted by Sourabh Saini 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Anuj Yadav 7 years, 11 months ago

(1) 2,5 dimethyl hexane (3) ethane nitrite

ANSWER

iN nacl cryslatl cl ion form the cubic close packing what sites occupy by tha Na ion

Posted by Mani Rana 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aanchal Gupta 8 years ago

Octavoids

ANSWER

How to convert benzoyl alcohol to benzoic acid

Posted by Juby Biju 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the procedure to do Bsc after 12th?

Posted by Shivani Verma 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

E°(A2+/A) = -2.37V and E°(B2+/B) = -0.14V. Which of these is better for coating the surface of iron [E°(Fe2+/Fe) = -0.44V] to prevent corrosion and why?

Posted by Kamal Singh Rawat 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Arrange the increasing order of boiling point and give reason also: a) CH3CH2OH b) CH3COOH c) CH3CHO

Posted by Kamal Singh Rawat 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aditi Singh 8 years ago

b>a>c

ANSWER

What is electron gain enthalpy

Posted by Rishu Yadav 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Mohammad Anas 8 years ago

The enthalpy required to add an e- to the valence shell of atom known as e- gain enthalpy..

ANSWER

Hlehy halogens are coloured

Posted by Vishal Kumar 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride??????

Posted by Harbati Yadev 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Aditi Singh 8 years ago

Resonance ka concept nhi lagega It is because of the difference in hybridisation of carbon to which the chlorine is attached

Hrythm Munjal 8 years ago

Because lone pair of chlorine in chlorobenzene are in resonance with the ring !!

ANSWER

Example of anionic detergent?

Posted by Luksh Kumar 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Aditi Singh 8 years ago

Sodium lauryl sulphate Sodium dodecyl benzene sulphonic acid

ANSWER

IUPAC name of ethyldiene

Posted by Heena Yadav 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Rachit Goyal 8 years ago

Ethyldiene not possible but Ethylene can CH2=CH2

Rajneesh Verma 8 years ago

Eth 1'2 di alkene

ANSWER

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