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Two liquids X&Y on mixing form an ideal solution. At 30°C the v.p. of sol containing 3 moles of X and 1 mol of Y is 550mm Hg. But when 4mol of X and 1 mol of Y are remixed v.p. of the sol becomes 560mmHg. What is the v.p. of pure X&Y.

Posted by Riya Gupta 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Define tailing of mercury

Posted by Sandeep Kumar 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Short note on hybridisation

Posted by Anjali Rathore 8 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Shristi Mourya 8 years, 3 months ago

Hybridization is the idea that atomic orbitals fuse to form newly hybridized orbitals, which in turn, influences molecular geometry and bonding properties. Hybridization is also an expansion of the valence bond theory

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What is electrophilic substitution

Posted by Sheetal Wankhede 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Shristi Mourya 8 years, 3 months ago

Electrophilic substitution reactions are chemical reactions in which an electrophile displaces a functional group in a compound, which is typically, but not always, a hydrogen atom.

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Can i have all the conceptual questions of p-block And also a humble request that give an option for the question paper to be downloaded and will be available without answer . Thank you.

Posted by Shweta Verma 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Answers sheet

Posted by Avdhesh Bhatt 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Molality

Posted by Kanchan Sagar 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Shristi Mourya 8 years, 3 months ago

No. Of moles of solute per mass of solvent in kg

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how we learn the reactions of organic chemistry

Posted by Manpreet Kaur 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Is Glass is an amorphous solid

Posted by Neha Negi 8 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Shirin Kalam 8 years, 3 months ago

Yes,because when glass breaks ,it has irregular surface,this is one of the characteristic of amorphous solid

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Manpreet Kaur 8 years, 3 months ago

the moleculer then have a disordered arrangement byut sufficient cohesion to maintain some rigidity. In this state it is often called an amorphous solid or glass

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Which of the following is most stable complex and why? [Co(NH3)] 3+ and [CO(en)3]3+

Posted by Aditi Diwedi 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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How to see who thanks me for giving answer?

Posted by Shristi Mourya 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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What is solution

Posted by Nandan Kumar 8 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Amar Kumar 8 years, 3 months ago

A solution is a homogeneous mixture of two or more substances. A solution may exist in any phase. A solution consists of a solute and a solvent.For example, in a saline solution, salt is the solute dissolved in water as the solvent.

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Nandan Kumar 8 years, 3 months ago

It is the homogeneous mixture of two or more component

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If we interchange the electrode in galvanic cell not solution but happen with current

Posted by Vijay Meena 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Alcohol rx

Posted by Hars Thakur 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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How we can prepare mono carboxylic acids from alchols and aldehydes and ketones

Posted by Aman Singh 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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What is picric acid

Posted by Jainendra Kumar 8 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Raveesh Yadav 8 years, 3 months ago

2,4,6-trinitrophenol (TNP).

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Distinguished b/w ethanol & propan2ol

Posted by Prashant Chandel 8 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Raveesh Yadav 8 years, 3 months ago

Add Lucas reagent (It is a compound of Anhydrous zinc chloride and conc. HCL) to the unknown given alcohol and then observe the changes.
If you see that that there are no changes then it can be concluded that it is a primary alcohol (Ethanol) .If you see turbidity or cloudiness in the alcohol after 5 minutes then it is a secondary alcohol( propan 2 ol).If you see turbidity immediately after addition of Lucas reagent then it can be concluded the alcohol is tertiary alcohol.

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What is polymer

Posted by Tanborlang Sohshang 8 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Raveesh Yadav 8 years, 3 months ago

large number of Monomer unit units comvbine chemically to form polymer and the reaction is calleed polymerisation reactions.

Eg. polymerisation of Ethene to polythene

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What is threshold energy

Posted by Sneha Dwivedi 8 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Raveesh Yadav 8 years, 3 months ago

The minimum amount of energy that molecule need to have in order for a reaction to take place is called threshold energy.

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What are amourphous solids

Posted by Swayman Singh 8 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Amar Kumar 8 years, 3 months ago

An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel.Amorphous solids do not have a sharp melting point; they are softened in a range of temperature.

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Write down Carbylamines reaction.

Posted by Aman Sidhu 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Rfsyu uc d

Posted by Aditya Ojha 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Alkyl halide is polar but in soluble in water why

Posted by Aditya Ojha 8 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Shristi Mourya 8 years, 3 months ago

Alkyl halides have dipole dipole attraction among them and Hydrogen molecules consist of hydrogen bonding or wanderwal's forces of attraction it is difficult for Alkyl halides to break these bonds. So Alkyl halides are insoluble in water.

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Alkyl halide is polar but insoluble in water

Posted by Aditya Ojha 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Bleaching effect ?

Posted by Prince Tanwer 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Resonances

Posted by Dinesh Maity 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Shristi Mourya 8 years, 3 months ago

Different possible structures for the same molecular formula

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What is fajans rule

Posted by Harsh Vardhan Saxena 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Posted by Jay Anjana 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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What is half life?

Posted by Jackbon Mudiar 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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Why neon has maximum electron gain enthalpy

Posted by P Vikas 8 years, 3 months ago

CBSE > Class 12 > Chemistry

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