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How can we identify the nature of cubic unit?

Posted by Sanket Arjun 2 years, 10 months ago

CBSE > Class 12 > Chemistry

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Why cannot aromatic primary amines be prepared by Gabriel phthalimide synthesis?

Posted by Rohit Kumar Rout 2 years, 10 months ago

CBSE > Class 12 > Chemistry

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Chapter 12th important question answer

Posted by Komal Yadav 2 years, 10 months ago

CBSE > Class 12 > Chemistry

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Aldehyde question answer

Posted by Komal Yadav 2 years, 10 months ago

CBSE > Class 12 > Chemistry

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In alpha-methoxy propionaldehyde,what have we used alpha for? why do we write it this way?

Posted by Aryan Singh 2 years, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Alsamad Pathan 2 years, 10 months ago

Because, methoxy group is attached to the alpha carbon.( Carbon which is attached to functional group )

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Hvz reaction

Posted by Kadam Shubham Zunjararao 2 years, 11 months ago

CBSE > Class 12 > Chemistry

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What is haloakene

Posted by Bul Bul Wahid 2 years, 11 months ago

CBSE > Class 12 > Chemistry

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Sia ? 2 years, 11 months ago

Haloalkanes are organic chemical compounds formed by replacement of one or more hydrogen atom from an alkane group by a halogen group (elements of group 17 such as chlorine, bromine, Fluorine, iodine, etc.).

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Aseem Mahajan 2 years, 11 months ago

In shock or happy?

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What happens when nitrobenzene in presence of palladium or platinum,hydrogen is supplied and treated . Write only chemical equation.

Posted by Radhika Jadaun 2 years, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Kush J 2 years, 11 months ago

Nitrobenzene +pd/H2 -------------> aniline

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Nitrogen preparation and uses

Posted by Arya Tripathi 2 years, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Abhishek Giri 2 years, 10 months ago

Nitrogen is use in boifertiliser

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Ammonia is a liquid, while other hydrases are non-metals, give reasons why.

Posted by Kavyansh Tembhre 2 years, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Radhika Jadaun 2 years, 11 months ago

Ammonia has intermolecular hydrogen bonding which holds ammonia molecules tightly. That is why NH3 exists as liquid whereas other hydrides exist as gases.

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Aseem Mahajan 2 years, 11 months ago

H - bonding

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Chirality

Posted by V Vikas 2 years, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Hiteshi Sharma 2 years, 11 months ago

A molecule or ion is called chiral... if it cannot be superposed on its mirror image by any combination of rotations, translations, and some conformational changes. This geometric property is called chirality

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V Vikas 2 years, 11 months ago

Answer for chirality

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Complete the reaction

Posted by Rimanta Kalita 2 years, 11 months ago

CBSE > Class 12 > Chemistry

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???

Posted by 🤟Royal Thakur 🤟 2 years, 11 months ago

CBSE > Class 12 > Chemistry

5 answers

🤟Royal Thakur 🤟 2 years, 11 months ago

Hope so ..

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Aseem Mahajan 2 years, 11 months ago

Cbse will see what to do

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🤟Royal Thakur 🤟 2 years, 11 months ago

Haan bro dekha maine lekin ab toh uske base pe he hm log omr check ho gyi hogi ....

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Aseem Mahajan 2 years, 11 months ago

Answer key is also wrong

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🤟Royal Thakur 🤟 2 years, 11 months ago

Hmm ye bhi ho skta...

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Is covid new variant is spreading fastly

Posted by Aditi Chandel 2 years, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Radhika Jadaun 2 years, 11 months ago

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Hiteshi Sharma 2 years, 11 months ago

Yes

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What is the oxidation number of sulphur in H2S2O7

Posted by Tanvir Singh 😊😀😊 2 years, 11 months ago

CBSE > Class 12 > Chemistry

5 answers

Hiteshi Sharma 2 years, 11 months ago

2(1)+2(x)+7(-2)=0 2+2x-14=0 2x-12=0 2x=12 x=12/2=+6

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Suhail Quraishi 2 years, 11 months ago

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Dishant Rajput 2 years, 11 months ago

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?Tamanna ?? 2 years, 11 months ago

+6?

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Aseem Mahajan 2 years, 11 months ago

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Why crystalline solids are anisotropic?

Posted by Dharamraj Choudhary 2 years, 11 months ago

CBSE > Class 12 > Chemistry

4 answers

Ningombam Ibecha 2 years, 11 months ago

Because they have a regular arrangement of constituent particles

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Dishant Rajput 2 years, 11 months ago

On moving from different direction we get different values of physical properties. See diagram showing directions using AB BC type in NCERT.

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?Tamanna ?? 2 years, 11 months ago

some of their physical properties like electrical resistance or refractive index show different values when measured along different directions in the same crystals. This arises from different arrangement of particles in different directions.

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Tamanna Saini 2 years, 11 months ago

Because they have a regular arrangement

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Which of these have higher boiling point: phenol or alcohol

Posted by Dharamraj Choudhary 2 years, 11 months ago

CBSE > Class 12 > Chemistry

5 answers

Dishant Rajput 2 years, 11 months ago

Phenol

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Nikita Choudhary 2 years, 11 months ago

Alcohol due to H bonding

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?Tamanna ?? 2 years, 11 months ago

Phenol

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Tanvir Singh 😊😀😊 2 years, 11 months ago

Depends upon the molecular mass of alcohol

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Aseem Mahajan 2 years, 11 months ago

Alcohol

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Which one is most acidic alcohol, phenol or water?

Posted by Dharamraj Choudhary 2 years, 11 months ago

CBSE > Class 12 > Chemistry

5 answers

Dishant Rajput 2 years, 11 months ago

Phenol then water and then alcohol.

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?Tamanna ?? 2 years, 11 months ago

Phenol

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Tanvir Singh 😊😀😊 2 years, 11 months ago

Phenol

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Akhilesh Rawat 2 years, 11 months ago

Phenol

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Aseem Mahajan 2 years, 11 months ago

Phenol

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IUPAC name of the following compound

Posted by Siddhi Prem 3 years ago

CBSE > Class 12 > Chemistry

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What is fehlings solution

Posted by Priti Choudhury 3 years ago

CBSE > Class 12 > Chemistry

3 answers

Nikita Choudhary 2 years, 11 months ago

Cuo

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Kunishka Yadav 2 years, 11 months ago

Fehling's solution is a chemical reagent used to differentiate between water-soluble carbohydrate and ketone functional groups, and as a test for reducing sugars and non-reducing sugars, supplementary to the Tollens' reagent test

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Jaya Shree 2 years, 11 months ago

Fehling solution is a mixture of copper sulphate, potassium sodium tartrate, and sodium hydroxide. It is used to differentiate between water-soluble carbohydrates (aldehyde) and ketone functional groups and as a test for reducing sugar.

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Which of the following statement is not true A) pressure is higher under water than at the surfaces of a sea B) low surface pressure is responsible for the formation of bends in the body of scuba divers C) bends are actually the bubbles of nitrogen in the blood. D) due to high pressure, solubility of atmospheric air gases in the blood decreases.

Posted by Vikashkumar Kumar 3 years ago

CBSE > Class 12 > Chemistry

2 answers

Shashank 11 3 years ago

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Kumar Prateek 3 years ago

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Ionic equilibrium

Posted by Nithu Seervi 3 years ago

CBSE > Class 12 > Chemistry

2 answers

Kunishka Yadav 3 years ago

Ionic equilibrium is the equilibrium established between the unionized molecules and the ions in a solution of weak electrolytes. pH is a measure of acidity or alkalinity of a solution. Acids produce hydrogen ions in solution. When a sparingly soluble salt is dissolved in water, a dynamic equilibrium is established.

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Jaya Shree 3 years ago

The equilibrium established between the unionized molecules and the ions in the solution of weak electrolytes is called ionic equilibrium. For example, take acetic acid breaking up into acetate ions and hydrogen ions: CH3 COOH → CH3 COO- + H+ Chemical substances that can conduct electricity in their aqueous state or in molten state are called electrolytes. In pure water or in an aqueous solution, the product of concentrations of hydrogen and hydroxyl ions is a constant at a given temperature. This is called ionic product of water and is conventionally designated by Kw. The idea of the ionic product of water can be understood by looking at the autoionization reaction of water that may be expressed as: H2 O + H2 O = H3 O+ + OH- Kw = CH3 O+ COH- The value of Kw at 25°C is 1*10-14. In the study of acid base equilibria in aqueous solutions, we're primarily interested in the hydrogen ion concentration of a solution. Solutions that we deal with are usually dilute, and the hydrogen ion concentrations are some negative power of 10. pH is a measure of hydrogen ion concentration. It's a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline. pH can be calculated using the following formula. pH = -log CH3 O+ Let's discuss how to calculate pH with an example. What will be the concentration of CH3 O+ in a solution having pH = 5.6? Solution: pH = -log CH3 O+ log [H3 O+] = -pH log [H3 O+] = -5.6 [H3 O+] = antilog (-5.6) = 2.512*10-6

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Evaluation of drinking water from various sources

Posted by Nikhil Kishore Sharma 3 years ago

CBSE > Class 12 > Chemistry

1 answers

Jaya Shree 3 years ago

These are the different types of water sources around the globe and how they each play a role in what comes out of your home's sink. Surface Water Resources. ... Groundwater Resources. ... Stormwater Resources. ... Wastewater Resources. ... Saltwater Resources. ... Ice Cap Water Resources.

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Dislocation defect is also known as

Posted by Harsh Tiwari 3 years ago

CBSE > Class 12 > Chemistry

5 answers

Deepak Kumar 3 years ago

Frenkel defect is the correct answer

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Shinchan Gaming 3 years ago

Frankel

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Sanju Tanwar 3 years ago

Frenkel defect

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Shreya Chatterjee 3 years ago

Frenkel defect

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Nikhil Kishore Sharma 3 years ago

Frenkel defect

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Why do solid have a definite volume?

Posted by Milan Gr 3 years ago

CBSE > Class 12 > Chemistry

4 answers

?Tamanna ?? 2 years, 11 months ago

because the molecules in solid are closely packed and in fixed positions.

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Diya Bhati 3 years ago

Because of small intermolecular distance they are held closer, hence greater force of attraction which results in definite volume and shape

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Shinchan Gaming 3 years ago

High force of interaction between molecular

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Kunal Jadhav 3 years ago

Because solid have strong intermolecular space..

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What are antichlors

Posted by Mukkamal Maan 3 years ago

CBSE > Class 12 > Chemistry

0 answers

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Haloalkanes and haloarenes

Posted by Manjit Godara 3 years ago

CBSE > Class 12 > Chemistry

1 answers

Piyush Baghel 3 years ago

Haloalkanes and haloarenes are the hydrocarbons in which one or more hydrogen atoms have been replaced with halogen atoms. The primary difference between haloalkanes and haloarenes is that haloalkanes are derived from open-chain hydrocarbons (alkanes) whereas haloarenes are derived from aromatic hydrocarbons

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High electronic configuration is

Posted by Piyush Baghel 3 years ago

CBSE > Class 12 > Chemistry