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Aluminium sulphide gives a fowl smell when damped why ?

Posted by Souradip Majumder 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

In Example 1.5 the power is not coming wrong need solution urgently

Posted by Rajveer Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why doesn't electron pairing take place in [Fe(NH3)6]2+ though NH3 is a strong ligand field producer?

Posted by Shaurya Pratap Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Vishal Kumar 7 years, 1 month ago

Ammonia is a medium-field ligand at best, and water is the defined 'zero point' below which weak field ligands begin. I understand that pairing of electrons occur in the case of strong field ligands and it does not occur in the case of weak field ligands.

ANSWER

Co(NH3) 6 3 +

Posted by Vinayak Sharma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Monomer of Buna S

Posted by Mukesh Pal 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Vishal Kumar 7 years, 1 month ago

1,3 butadiene and styrene

Mansi Sharma 5 years, 8 months ago

1,3 Butadiene + Styrene

ANSWER

What type of linkage is present in nuclic acid ?

Posted by Pratham Kaushik 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Vishal Kumar 7 years, 1 month ago

Phosphodiester linkage

Pratham Kaushik 7 years, 1 month ago

Nuccleotides are bonded together through phosphodiester linkages between the 5' and 3' carbon atoms to form Nucleic acid

ANSWER

What are the reaction which can double the no. Of carbon atoms Or Increase the number of carbon Atom. And decrease the no. Of carbon atom

Posted by Ishani Gupta 7 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Praveen . D 7 years, 1 month ago

Methanol to ethanol CH3-OH (HI) =CH3I (KCN) =CH3-CN(4H)= CH3-CH2(HNO2) =CH3-CH2-OH YES, KCN IS USE TO ADD 1 EXTRA CARBON ATOM

Vishal Kumar 7 years, 1 month ago

Increase the no of carbon by wurtz rx fittig rx adol condensation reaction with KCN

Mansi Sharma 7 years, 1 month ago

To increase the carbons

Mansi Sharma 7 years, 1 month ago

Reaction i don't know but add KCN to that compound

ANSWER

Define average rate of reaction with graphical representation

Posted by Sonali Verma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Vishal Mehendiratta 7 years, 1 month ago

Average rate of rxn is that type of rxn in which there is change in concentration w.r.t time at a given interval of time

ANSWER

How to find equivalent weight

Posted by Deep Aryan 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Esha Sharma 7 years, 1 month ago

Equivalent weight = molecular mass / valency

Vishal Mehendiratta 7 years, 1 month ago

Equivalent weight= given weight / molecular mass

ANSWER

What is S block element

Posted by Lincoln Sirmour 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Pratibha Ydv 7 years, 1 month ago

The element whose last electron enters in s-subshell.

ANSWER

Phenol is acidic but doesnot react with sodium bicarbonate solution.why

Posted by Sam Sangam 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 1 month ago

Phenols are weakly acidic in nature. They turn blue litmus red and react with alkali metals and alkalies to form their salts. Phenol is a weaker acid than carboxylic acid, hence does not react with sodium carbonate and sodium bicarbonate.

ANSWER

What is antifertility drugs

Posted by Abhishek Raj 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Mansi Sharma 7 years, 1 month ago

Examples are Norethindrone and novestrol.

Mansi Sharma 7 years, 1 month ago

Chemical substances which supress the action of harmones .

ANSWER

What is the use of Lucas reagent

Posted by Praveen . D 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Rohit Pradhan 7 years, 1 month ago

Lucas reagent is used to distinguish 3,2 and1 degree alcohol

ANSWER

What is a complex

Posted by Arnav Verma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Praveen . D 7 years, 1 month ago

Complex is a molecule formed by combination of ligands and metal ion

ANSWER

Why alkyl halide is more reactive than aryl halide

Posted by Himanshu Gupta 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Satnam Kaur 7 years, 1 month ago

Alkyl halides are sp3 hybrids whereas aryl halides are sp2 hybrdies .due to resonance these are more stable as compare to alkyl halides

ANSWER

Density formula

Posted by Ravi Sharma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Shobha??? Kumari 7 years, 1 month ago

Density=mass/volume

ANSWER

Formulae of nitril group

Posted by Ajay Vishwakarma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Mansi Sharma 7 years, 1 month ago

C triple bond N

ANSWER

I studied only last 10 years board papers how much will i score in board exam..

Posted by Mano Mano 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Rosenmund reaction

Posted by Rahul Das 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Nargish Pater 7 years, 1 month ago

RCOCL+ H2 (Pd-BaSO4) = RCH=O + HCl

ANSWER

I want cbsc board exam and practical exams paper of previous year

Posted by Purvi Chheda 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Ohm's law

Posted by Manglun Phaltual 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Abhi Singh 7 years, 1 month ago

When physical factors such as temperature and pressure are kept constant then Current flowing through wire is directly proportional to potential Applied...

O Singh 7 years, 1 month ago

V=IR

ANSWER

William sons synthesis

Posted by Ishani Gupta 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Shriya Gautam 7 years, 1 month ago

R-X +R-O-Na gives R-O-R+NaX.

ANSWER

Mechanism of aldol condensation?

Posted by Rudra Bajaj 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 1 month ago

The mechanism of aldol condensation initiates with the formation of carbanion intermediate. Refer to the steps below to observe the mechanism of aldol condensation in the presence of a base as a catalyst.

Aldol Condensation in Aldehydes with Base as a Catalyst

Step 1: Removal of α-hydrogen from the base
Step 2: The first step results in the formation of carbanion which undergoes a nucleophilic addition reaction with the carbonyl group present in the second molecule of the aldehyde (in this case ethanal). The second step results in the formation of the condensation product.
Step 3: Protonation of alkoxide ion will occur due to reaction with water.
Step 4: Heating of the aldol compound in the basic solution will help in dehydrating the product to form α β‐unsaturated aldehyde compound.

ANSWER

In the process

Posted by Deepanshu Sharma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How does markowniks off rule work

Posted by Taring Mary 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Rd Ritik 7 years, 1 month ago

It applicable to asymmetrical alkene when in alkene for eg hbr is added then +ve part go to that carbon which have more hydrogen and with least no of hydrogen

ANSWER

How is excess of copper and iron are you from body

Posted by Aayush Subba 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Send me periodic table

Posted by Rajeev Kumar 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Digvijay More 7 years, 1 month ago

Periodic table Okay

ANSWER

Why perchloric acid is stronger acid than sulphuric acid

Posted by Swayam Prava Sahu 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 1 month ago

Perchloric acid is stronger acid than sulphuric acid because Cl is more electronegative than S. Perchloric acid has more number of double bond than H₂SO₄. So Perchloric acid is more acidic than H₂SO₄.
and the conjugate of it is more stable.

ANSWER

Give one chemical test to distinguish between C2H5Br and C6H5Br

Posted by Harsimran K 4 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 6 months ago

Hydrolysis of C₂H₅Br with refluxing aqueous KOH followed by acidification with dil HNO₃ and subsequent treatment with AgNO₃ gives light yellow ppt. of AgBr whereas C₆H₅Br does not gives this test.

ANSWER

Convert ethanol to but-1- yne

Posted by Mohit Kumar 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Harsimran K 7 years, 1 month ago

Ethanol in the presence of SOCl2 forms chloro ethane, then in presence of NaNH2 in liq NH3 at 196k gives but-1- yne

ANSWER

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